<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPolicies" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesReconciliationOfCashCashEquivalentsAndRestrictedCashDetails" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPoliciesReconciliationOfCashCashEquivalentsAndRestrictedCashDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesScheduleOfRestatementToRevenuesDetails" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPoliciesScheduleOfRestatementToRevenuesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="saic-20190201.xsd#BusinessOverviewAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessSegmentInformation" xlink:href="saic-20190201.xsd#BusinessSegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/BusinessSegmentInformationDetails" xlink:href="saic-20190201.xsd#BusinessSegmentInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponent" xlink:href="saic-20190201.xsd#ChangesInAccumulatedOtherComprehensiveLossByComponent" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:href="saic-20190201.xsd#ChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponentTables" xlink:href="saic-20190201.xsd#ChangesInAccumulatedOtherComprehensiveLossByComponentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedBalanceSheets" xlink:href="saic-20190201.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="saic-20190201.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfEquity" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfEquityParenthetical" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/ConsolidatedStatementsOfIncome" xlink:href="saic-20190201.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligations" xlink:href="saic-20190201.xsd#DebtObligations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligationsMaturitiesOfLongTermDebtDetails" xlink:href="saic-20190201.xsd#DebtObligationsMaturitiesOfLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligationsNarrativeDetails" xlink:href="saic-20190201.xsd#DebtObligationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligationsScheduleOfLongTermDebtDetails" xlink:href="saic-20190201.xsd#DebtObligationsScheduleOfLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligationsScheduleOfLongTermDebtDetailsCalc2" xlink:href="saic-20190201.xsd#DebtObligationsScheduleOfLongTermDebtDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DebtObligationsTables" xlink:href="saic-20190201.xsd#DebtObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedges" xlink:href="saic-20190201.xsd#DerivativeInstrumentsDesignatedAsCashFlowHedges" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesNarrativeDetails" xlink:href="saic-20190201.xsd#DerivativeInstrumentsDesignatedAsCashFlowHedgesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesScheduleOfDerivativeInstrumentsDesignatedAsCashFlowHedgesDetails" xlink:href="saic-20190201.xsd#DerivativeInstrumentsDesignatedAsCashFlowHedgesScheduleOfDerivativeInstrumentsDesignatedAsCashFlowHedgesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesTables" xlink:href="saic-20190201.xsd#DerivativeInstrumentsDesignatedAsCashFlowHedgesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/DocumentAndEntityInformation" xlink:href="saic-20190201.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividends" xlink:href="saic-20190201.xsd#EarningsPerShareShareRepurchasesAndDividends" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsNarrativeDetails" xlink:href="saic-20190201.xsd#EarningsPerShareShareRepurchasesAndDividendsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsScheduleOfWeightedAverageSharesOutstandingDetails" xlink:href="saic-20190201.xsd#EarningsPerShareShareRepurchasesAndDividendsScheduleOfWeightedAverageSharesOutstandingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsTables" xlink:href="saic-20190201.xsd#EarningsPerShareShareRepurchasesAndDividendsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisition" xlink:href="saic-20190201.xsd#EngilityAcquisition" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionFairValueOfIntangibleAssetsAndRelatedWeightedAverageUsefulLivesDetails" xlink:href="saic-20190201.xsd#EngilityAcquisitionFairValueOfIntangibleAssetsAndRelatedWeightedAverageUsefulLivesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:href="saic-20190201.xsd#EngilityAcquisitionFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionNarrativeDetails" xlink:href="saic-20190201.xsd#EngilityAcquisitionNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionProFormaDetails" xlink:href="saic-20190201.xsd#EngilityAcquisitionProFormaDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionSummaryOfPreliminaryPurchaseConsiderationDetails" xlink:href="saic-20190201.xsd#EngilityAcquisitionSummaryOfPreliminaryPurchaseConsiderationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/EngilityAcquisitionTables" xlink:href="saic-20190201.xsd#EngilityAcquisitionTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/GoodwillAndIntangibleAssets" xlink:href="saic-20190201.xsd#GoodwillAndIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/GoodwillAndIntangibleAssetsEstimatedAnnualAmortizationExpenseDetails" xlink:href="saic-20190201.xsd#GoodwillAndIntangibleAssetsEstimatedAnnualAmortizationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:href="saic-20190201.xsd#GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/GoodwillAndIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:href="saic-20190201.xsd#GoodwillAndIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/GoodwillAndIntangibleAssetsTables" xlink:href="saic-20190201.xsd#GoodwillAndIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxes" xlink:href="saic-20190201.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesNarrativeDetails" xlink:href="saic-20190201.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:href="saic-20190201.xsd#IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesReconciliationOfProvisionForIncomeTaxesDetails" xlink:href="saic-20190201.xsd#IncomeTaxesReconciliationOfProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesScheduleOfChangesInUnrecognizedTaxBenefitsDetails" xlink:href="saic-20190201.xsd#IncomeTaxesScheduleOfChangesInUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsLiabilitiesDetails" xlink:href="saic-20190201.xsd#IncomeTaxesScheduleOfDeferredTaxAssetsLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/IncomeTaxesTables" xlink:href="saic-20190201.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/LegalProceedingsAndCommitmentsAndContingencies" xlink:href="saic-20190201.xsd#LegalProceedingsAndCommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/LegalProceedingsAndCommitmentsAndContingenciesDetails" xlink:href="saic-20190201.xsd#LegalProceedingsAndCommitmentsAndContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/OperatingLeases" xlink:href="saic-20190201.xsd#OperatingLeases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/OperatingLeasesFutureMinimumOperatingLeaseCommitmentsDetails" xlink:href="saic-20190201.xsd#OperatingLeasesFutureMinimumOperatingLeaseCommitmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/OperatingLeasesNarrativeDetails" xlink:href="saic-20190201.xsd#OperatingLeasesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/OperatingLeasesTables" xlink:href="saic-20190201.xsd#OperatingLeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/PropertyPlantAndEquipment" xlink:href="saic-20190201.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/PropertyPlantAndEquipmentNarrativeDetails" xlink:href="saic-20190201.xsd#PropertyPlantAndEquipmentNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:href="saic-20190201.xsd#PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/PropertyPlantAndEquipmentTables" xlink:href="saic-20190201.xsd#PropertyPlantAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlans" xlink:href="saic-20190201.xsd#RetirementPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansAmountsRecognizedInBalanceSheetDetails" xlink:href="saic-20190201.xsd#RetirementPlansAmountsRecognizedInBalanceSheetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansAssumptionsUsedDetails" xlink:href="saic-20190201.xsd#RetirementPlansAssumptionsUsedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansEstimatedFutureBenefitPaymentDetails" xlink:href="saic-20190201.xsd#RetirementPlansEstimatedFutureBenefitPaymentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansFairValueMeasurementPlanAssetsDetails" xlink:href="saic-20190201.xsd#RetirementPlansFairValueMeasurementPlanAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansNarrativeDetails" xlink:href="saic-20190201.xsd#RetirementPlansNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansObligationsAndFundedStatusDetails" xlink:href="saic-20190201.xsd#RetirementPlansObligationsAndFundedStatusDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RetirementPlansTables" xlink:href="saic-20190201.xsd#RetirementPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/Revenues" xlink:href="saic-20190201.xsd#Revenues" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesChangeInEstimatesOnContractsDetails" xlink:href="saic-20190201.xsd#RevenuesChangeInEstimatesOnContractsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesContractBalancesDetails" xlink:href="saic-20190201.xsd#RevenuesContractBalancesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesDeferredCostsDetails" xlink:href="saic-20190201.xsd#RevenuesDeferredCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesDisaggregationOfRevenuesDetails" xlink:href="saic-20190201.xsd#RevenuesDisaggregationOfRevenuesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesNarrativeDetails" xlink:href="saic-20190201.xsd#RevenuesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesPerformanceObligationDetails" xlink:href="saic-20190201.xsd#RevenuesPerformanceObligationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/RevenuesTables" xlink:href="saic-20190201.xsd#RevenuesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:href="saic-20190201.xsd#SelectedQuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:href="saic-20190201.xsd#SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:href="saic-20190201.xsd#SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensation" xlink:href="saic-20190201.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationFairValueAndValuationAssumptionsOfStockOptionsDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationFairValueAndValuationAssumptionsOfStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationNarrativeDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationScheduleOfPerformanceShareAwardActivityDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationScheduleOfPerformanceShareAwardActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationScheduleOfSharedBasedCompensationCostRelatedToStockOptionsDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationScheduleOfSharedBasedCompensationCostRelatedToStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationScheduleOfStockBasedCompensationExpenseAndRelatedTaxBenefitsDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationScheduleOfStockBasedCompensationExpenseAndRelatedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationScheduleOfStockOptionActivityDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationScheduleOfStockOptionActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationScheduleOfVestingStockAwardActivityDetails" xlink:href="saic-20190201.xsd#StockBasedCompensationScheduleOfVestingStockAwardActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.saic.com/role/StockBasedCompensationTables" xlink:href="saic-20190201.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesReconciliationOfCashCashEquivalentsAndRestrictedCashDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1ce4b89e-fa52-7101-5bea-622168a4559a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1ce4b89e-fa52-7101-5bea-622168a4559a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_9b51435d-78b0-60ad-5d83-343c76eab3d9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1ce4b89e-fa52-7101-5bea-622168a4559a" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_9b51435d-78b0-60ad-5d83-343c76eab3d9" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesScheduleOfRestatementToRevenuesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessOverviewAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessSegmentInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/BusinessSegmentInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponent" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_fd048371-7ae9-878a-d401-982ff73ca2e8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_3abb3548-5c4d-f7e9-ec84-657c5af7d43a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_fd048371-7ae9-878a-d401-982ff73ca2e8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_3abb3548-5c4d-f7e9-ec84-657c5af7d43a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_19a9882d-ffc5-f60a-48da-a57a1ebf19e9" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_fd048371-7ae9-878a-d401-982ff73ca2e8" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_19a9882d-ffc5-f60a-48da-a57a1ebf19e9" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/ChangesInAccumulatedOtherComprehensiveLossByComponentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherEmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent_de27263b-a98d-f670-4fa8-a1549c395ddb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent_de27263b-a98d-f670-4fa8-a1549c395ddb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedVacationCurrent" xlink:label="loc_us-gaap_AccruedVacationCurrent_b8f4ceb9-0776-826c-20ff-62f5117a67ea" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_AccruedVacationCurrent_b8f4ceb9-0776-826c-20ff-62f5117a67ea" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_d9354686-0832-bbe3-9389-140489c487e8" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_d9354686-0832-bbe3-9389-140489c487e8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_LongTermDebtCurrent_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_d3ba3006-9df7-8186-2eb2-dc5094562cfe" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_d3ba3006-9df7-8186-2eb2-dc5094562cfe" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_f0c68f4f-7ec1-d447-8ba7-0f2766abbe67" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_CommitmentsAndContingencies_f0c68f4f-7ec1-d447-8ba7-0f2766abbe67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_df284507-8ac7-eed1-41db-05e81b70be6d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_df284507-8ac7-eed1-41db-05e81b70be6d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_a9feabf5-0bf0-3efe-740e-f5e41a4b3194" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e0c0480e-e6f5-c4df-ce25-1ffa4a8c827a" xlink:to="loc_us-gaap_MinorityInterest_a9feabf5-0bf0-3efe-740e-f5e41a4b3194" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_66bcd79a-a1c3-c24d-b8b4-7a0ce373714b" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_InventoryNet_66bcd79a-a1c3-c24d-b8b4-7a0ce373714b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_b69fa2fe-d7f6-024f-39fb-29cad0c95853" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_b69fa2fe-d7f6-024f-39fb-29cad0c95853" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_OtherAssetsCurrent_79aabdc0-b963-1fd1-4e81-8c0801b1ebca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_9743d583-dfae-6ae9-f133-a1e331df792c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_9743d583-dfae-6ae9-f133-a1e331df792c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_97b88949-d4fc-dff4-be7f-d39018557f4e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_DepreciationAndAmortization_97b88949-d4fc-dff4-be7f-d39018557f4e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d346b6a0-4ddf-16a5-9e91-c8c6b50db7a6" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d346b6a0-4ddf-16a5-9e91-c8c6b50db7a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_90cbc3ab-f555-6407-b3b4-b2bfa84c9f18" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_ShareBasedCompensation_90cbc3ab-f555-6407-b3b4-b2bfa84c9f18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_05d184be-d5e1-45d0-e2a4-9f9da06e5071" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_05d184be-d5e1-45d0-e2a4-9f9da06e5071" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ef1b7738-192b-a4ca-6396-5577f303c271" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ef1b7738-192b-a4ca-6396-5577f303c271" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_11620bd8-431c-98f6-ac51-02db9613dc06" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_11620bd8-431c-98f6-ac51-02db9613dc06" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_InventoryFirmPurchaseCommitmentLossandDeferredContractCosts" xlink:label="loc_saic_InventoryFirmPurchaseCommitmentLossandDeferredContractCosts_F7003D91798F261D2A88B55CDD46A504" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_saic_InventoryFirmPurchaseCommitmentLossandDeferredContractCosts_F7003D91798F261D2A88B55CDD46A504" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_5f96c19e-85fe-99f6-cec0-c2c9d7470ed4" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_5f96c19e-85fe-99f6-cec0-c2c9d7470ed4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0e4168a9-901d-abb5-15c0-3622e9e2c070" xlink:type="locator" />
    <link:calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0e4168a9-901d-abb5-15c0-3622e9e2c070" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_366aa09e-f759-b63b-77e0-83ad3a947a55" xlink:type="locator" />
    <link:calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_366aa09e-f759-b63b-77e0-83ad3a947a55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_91c354d1-d18f-051e-80cb-f13c01058b9d" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_91c354d1-d18f-051e-80cb-f13c01058b9d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_bb8c0c41-60b6-6ad9-c835-6a671aae07c5" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_bb8c0c41-60b6-6ad9-c835-6a671aae07c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_4e0ea51c-d09a-0164-9f15-a1d8d4927a87" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_4e0ea51c-d09a-0164-9f15-a1d8d4927a87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_9743d583-dfae-6ae9-f133-a1e331df792c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_80abba07-181c-6ed2-349d-9d7dfc078eab" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_80abba07-181c-6ed2-349d-9d7dfc078eab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_9743d583-dfae-6ae9-f133-a1e331df792c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_15de0c29-7f29-fc68-dcff-36f8e7ff06d8" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_15de0c29-7f29-fc68-dcff-36f8e7ff06d8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_7d42c724-e395-d9cd-4d02-38341e761dae" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_RepaymentsOfDebt_7d42c724-e395-d9cd-4d02-38341e761dae" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_6ec8bc8e-bcd9-36ad-d8ae-2c2fa1dfd920" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_6ec8bc8e-bcd9-36ad-d8ae-2c2fa1dfd920" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d4a92697-d008-996b-823a-bd9a56a04b3a" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d4a92697-d008-996b-823a-bd9a56a04b3a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_533cef65-f809-b4cc-fbfc-c72da59ce951" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_533cef65-f809-b4cc-fbfc-c72da59ce951" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_DisbursementsForObligationsAssumedFromAcquisition" xlink:label="loc_saic_DisbursementsForObligationsAssumedFromAcquisition_302a9553-9602-dec9-781f-42bc8a3b6350" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_saic_DisbursementsForObligationsAssumedFromAcquisition_302a9553-9602-dec9-781f-42bc8a3b6350" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_51c81063-9b68-dd0f-b2a1-9bda45041695" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_51c81063-9b68-dd0f-b2a1-9bda45041695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_6accd1a2-f190-7888-29dd-29802af49bdc" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_6accd1a2-f190-7888-29dd-29802af49bdc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_ea422513-12bd-029b-0166-7c34286633bc" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_ea422513-12bd-029b-0166-7c34286633bc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_a5dc819c-8eaf-e4c1-9f51-d9cf65264aae" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_a5dc819c-8eaf-e4c1-9f51-d9cf65264aae" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:to="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_e68ce304-18e4-96c0-3260-363a872863db" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0e67d263-6e0f-cbd4-f553-6c8cebeb68d8" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_e68ce304-18e4-96c0-3260-363a872863db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_740d7ae2-7793-6003-66da-fd16a2cbdae4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_e68ce304-18e4-96c0-3260-363a872863db" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_740d7ae2-7793-6003-66da-fd16a2cbdae4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_5ce14451-f6e2-484d-255e-9e8a7cec2fca" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_740d7ae2-7793-6003-66da-fd16a2cbdae4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_5ce14451-f6e2-484d-255e-9e8a7cec2fca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_c191821c-f252-2803-a04e-b4cba8a22b8d" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_740d7ae2-7793-6003-66da-fd16a2cbdae4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_c191821c-f252-2803-a04e-b4cba8a22b8d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_ff106bf5-082b-8f58-cc36-c7f91866b7d3" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_ff106bf5-082b-8f58-cc36-c7f91866b7d3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfEquityParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:to="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c604cfe-da19-5194-72b6-98be0130cfb7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c604cfe-da19-5194-72b6-98be0130cfb7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_a79a15e4-e17e-4bc8-9f1a-c19d2040db8f" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_CostOfRevenue_a79a15e4-e17e-4bc8-9f1a-c19d2040db8f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_693c47dd-e6fa-9c85-6a65-7baa26f76b5e" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_693c47dd-e6fa-9c85-6a65-7baa26f76b5e" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_BusinessCombinationAcquisitionAndIntegrationRelatedCosts" xlink:label="loc_saic_BusinessCombinationAcquisitionAndIntegrationRelatedCosts_F1885464E21859C16DAD55CBA3172118" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_saic_BusinessCombinationAcquisitionAndIntegrationRelatedCosts_F1885464E21859C16DAD55CBA3172118" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_a56b34b7-57ab-a07c-7f03-8366849a14f0" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_InterestExpense_a56b34b7-57ab-a07c-7f03-8366849a14f0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_8aa68cfb-2df7-9a23-d1ed-4fe33385b4a2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_f5ae002e-8316-7bc0-1b41-6cd171b53db3" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_f5ae002e-8316-7bc0-1b41-6cd171b53db3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligationsMaturitiesOfLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_5cb3949c-1d57-8f66-f002-a3389de7aec0" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_5cb3949c-1d57-8f66-f002-a3389de7aec0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_53634569-cdf7-3d1b-42b0-596cb4175c67" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_53634569-cdf7-3d1b-42b0-596cb4175c67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_c4573bf7-1f66-8dfe-59b9-b6903f55406f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_c4573bf7-1f66-8dfe-59b9-b6903f55406f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_e00da32d-ed06-bb21-8b28-7e7ede769972" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_e00da32d-ed06-bb21-8b28-7e7ede769972" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_89018c92-f86f-28e7-853c-438f4a34e1f6" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_89018c92-f86f-28e7-853c-438f4a34e1f6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_3b793654-c1ac-69c9-9cf3-81e6dfe102d7" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_3b793654-c1ac-69c9-9cf3-81e6dfe102d7" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligationsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligationsScheduleOfLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="locator" />
    <link:loc xlink:href="saic-20190201.xsd#saic_DebtInstrumentNonCurrentCarryingAmount" xlink:label="loc_saic_DebtInstrumentNonCurrentCarryingAmount_00e13036-37b4-25bc-8114-42bc8abf0ada" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:to="loc_saic_DebtInstrumentNonCurrentCarryingAmount_00e13036-37b4-25bc-8114-42bc8abf0ada" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_450782c6-2839-854f-cd33-795c87a08ecc" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_450782c6-2839-854f-cd33-795c87a08ecc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFinanceCostsCurrentNet" xlink:label="loc_us-gaap_DeferredFinanceCostsCurrentNet_bbb2f385-336f-29e8-a9b4-26ef5da47e20" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_450782c6-2839-854f-cd33-795c87a08ecc" xlink:to="loc_us-gaap_DeferredFinanceCostsCurrentNet_bbb2f385-336f-29e8-a9b4-26ef5da47e20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_fa5260eb-4b1c-e22f-06c9-c0ec68b6fbe9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_450782c6-2839-854f-cd33-795c87a08ecc" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_fa5260eb-4b1c-e22f-06c9-c0ec68b6fbe9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_DebtInstrumentCurrentCarryingAmount" xlink:label="loc_saic_DebtInstrumentCurrentCarryingAmount_cc04855c-8ab2-5abb-7fc3-96a109a91f95" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_saic_DebtInstrumentCurrentCarryingAmount_cc04855c-8ab2-5abb-7fc3-96a109a91f95" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_88b8f1df-ff6f-5cd6-e45f-5878f70c11d5" xlink:to="loc_saic_DebtInstrumentNonCurrentCarryingAmount_00e13036-37b4-25bc-8114-42bc8abf0ada" xlink:type="arc" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_450782c6-2839-854f-cd33-795c87a08ecc" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligationsScheduleOfLongTermDebtDetailsCalc2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_84C19DE72CEAFF167BDEA1A3C3AF663B_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_84C19DE72CEAFF167BDEA1A3C3AF663B_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_84C19DE72CEAFF167BDEA1A3C3AF663B_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:to="loc_us-gaap_LongTermDebtCurrent_84C19DE72CEAFF167BDEA1A3C3AF663B_0d8925ae-714a-26e4-aa69-2d9eac65a5c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_84C19DE72CEAFF167BDEA1A3C3AF663B_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_84C19DE72CEAFF167BDEA1A3C3AF663B_80dca0ba-44dc-8565-fb9b-c2edfc8c357d" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_84C19DE72CEAFF167BDEA1A3C3AF663B_fcfc6b17-bfc5-2ebc-3fc1-751aa446a572" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/DebtObligationsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedges" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesScheduleOfDerivativeInstrumentsDesignatedAsCashFlowHedgesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DerivativeInstrumentsDesignatedAsCashFlowHedgesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividends" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsScheduleOfWeightedAverageSharesOutstandingDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_21ce4f2f-397c-6c02-8635-7c94146a06a0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2dd9a981-e559-d141-f1c2-4db79f71a7ef" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_21ce4f2f-397c-6c02-8635-7c94146a06a0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2dd9a981-e559-d141-f1c2-4db79f71a7ef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_e52bef3f-d63a-d129-8b6a-48192f5d97b3" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_21ce4f2f-397c-6c02-8635-7c94146a06a0" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_e52bef3f-d63a-d129-8b6a-48192f5d97b3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/EarningsPerShareShareRepurchasesAndDividendsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisition" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionFairValueOfIntangibleAssetsAndRelatedWeightedAverageUsefulLivesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_d9dcc428-b4f5-c94e-93ed-e250b0970b4c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_58fd71e3-3809-06f4-f87c-261f89531a0a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_d9dcc428-b4f5-c94e-93ed-e250b0970b4c" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_58fd71e3-3809-06f4-f87c-261f89531a0a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_d9dcc428-b4f5-c94e-93ed-e250b0970b4c" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_fbe331bf-e36a-7435-2eec-e3249b6c0997" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_fbe331bf-e36a-7435-2eec-e3249b6c0997" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayrollAndEmployeeBenefits" xlink:label="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayrollAndEmployeeBenefits_000eb335-e7d7-88fb-d02d-96a1092a6709" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:to="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPayrollAndEmployeeBenefits_000eb335-e7d7-88fb-d02d-96a1092a6709" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesAccruedVacation" xlink:label="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesAccruedVacation_290A81DBEE247BDEAA06979C102897DF" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:to="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesAccruedVacation_290A81DBEE247BDEAA06979C102897DF" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesOtherAccrued" xlink:label="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesOtherAccrued_E077D9CE91AF5ED1721B979CA2F0010B" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:to="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLiabilitiesOtherAccrued_E077D9CE91AF5ED1721B979CA2F0010B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_403bd7bd-aec1-42d0-9dba-3894488c17e9" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_cc1d8741-0bf1-0f1b-dbad-6859add56d00" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_403bd7bd-aec1-42d0-9dba-3894488c17e9" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill" xlink:label="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest_d9dcc428-b4f5-c94e-93ed-e250b0970b4c" xlink:to="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_395f9bb0-2492-f247-ce6b-39e67453292c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_395f9bb0-2492-f247-ce6b-39e67453292c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_8ce68675-8129-3ab4-cbd9-33127f150e28" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_8ce68675-8129-3ab4-cbd9-33127f150e28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_9ad6eb0b-0be8-3959-8888-f510808da951" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_9ad6eb0b-0be8-3959-8888-f510808da951" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_4969e367-c531-0df1-f44b-bfbc106efa7e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_4969e367-c531-0df1-f44b-bfbc106efa7e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_787094fe-6809-3d48-32a0-016251d35e96" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_787094fe-6809-3d48-32a0-016251d35e96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_588b212f-0609-2b89-932f-cbe7e57377ff" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_588b212f-0609-2b89-932f-cbe7e57377ff" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_090d08a1-b8fd-3634-47b8-7dcb68699de1" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_090d08a1-b8fd-3634-47b8-7dcb68699de1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_03034168-0c29-957e-9b7e-01ea7f13c7d8" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_03034168-0c29-957e-9b7e-01ea7f13c7d8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_0babce17-76af-948e-bcee-dc3ef7464b2a" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_0babce17-76af-948e-bcee-dc3ef7464b2a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsIncludingGoodwill_6C99DE7DA7C9D27A077CA1058FD29C66" xlink:to="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionProFormaDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionSummaryOfPreliminaryPurchaseConsiderationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/EngilityAcquisitionTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/GoodwillAndIntangibleAssets" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/GoodwillAndIntangibleAssetsEstimatedAnnualAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_423e6bba-f43d-931c-5711-51d5522b2aaa" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_423e6bba-f43d-931c-5711-51d5522b2aaa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_28c91f3b-370e-e76f-4199-69e4166aabc6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_28c91f3b-370e-e76f-4199-69e4166aabc6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f7796428-4176-97fe-5145-79a026d8547a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f7796428-4176-97fe-5145-79a026d8547a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_71fd8e03-8eaf-f20c-786b-5e0492fb281b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_71fd8e03-8eaf-f20c-786b-5e0492fb281b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8d652bfd-fc92-51b1-30d6-b90c4a94f960" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8d652bfd-fc92-51b1-30d6-b90c4a94f960" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_0e7343bd-e798-afc0-7fcc-ed296ae9f91c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_0e7343bd-e798-afc0-7fcc-ed296ae9f91c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/GoodwillAndIntangibleAssetsScheduleOfIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_7a49df76-38f6-6baa-87dd-2e9a7efd8303" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_7a49df76-38f6-6baa-87dd-2e9a7efd8303" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c9279b6a-f262-f140-7696-5ec40778343f" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c9279b6a-f262-f140-7696-5ec40778343f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/GoodwillAndIntangibleAssetsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b975ff9b-a11f-f2b5-e104-e0266dbbbfc6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b975ff9b-a11f-f2b5-e104-e0266dbbbfc6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_4d365c95-da3d-c3cb-6f6b-7945d285af9f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_4d365c95-da3d-c3cb-6f6b-7945d285af9f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_650e6c8f-1409-4de1-126f-784909f82e64" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_650e6c8f-1409-4de1-126f-784909f82e64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_10aa09ac-60b4-bd88-6c3b-c85b3f0fbf0a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_10aa09ac-60b4-bd88-6c3b-c85b3f0fbf0a" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesReconciliationOfProvisionForIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_46fd3e47-b379-3d5b-dad7-1fdc5e88b67f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_46fd3e47-b379-3d5b-dad7-1fdc5e88b67f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_147896db-b2dd-402f-9f5b-8c57c745a45a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_147896db-b2dd-402f-9f5b-8c57c745a45a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_1c8f4a72-9556-38d6-3d32-089e2d1a35fe" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_1c8f4a72-9556-38d6-3d32-089e2d1a35fe" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_b8a6f67f-d570-db88-37fa-3568c826ebc5" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_b8a6f67f-d570-db88-37fa-3568c826ebc5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductions" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductions_5e7a278e-ad20-8c20-ddc0-5b79841b3aed" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductions_5e7a278e-ad20-8c20-ddc0-5b79841b3aed" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_2fc8d554-3ed0-9aae-a23b-3842180d9904" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_2fc8d554-3ed0-9aae-a23b-3842180d9904" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_dccbbcdf-3af2-54ab-0e51-b4372916415d" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_dccbbcdf-3af2-54ab-0e51-b4372916415d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_2e521c71-adfb-ca01-5f8a-91ef5de0c792" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_2e521c71-adfb-ca01-5f8a-91ef5de0c792" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_7c88fa1f-0edb-d24c-9b87-0646da5010cf" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_7c88fa1f-0edb-d24c-9b87-0646da5010cf" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesScheduleOfChangesInUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences_eb75c0e2-c88b-e3b8-5fbb-1a0f57e86ebb" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences_eb75c0e2-c88b-e3b8-5fbb-1a0f57e86ebb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_0864ed24-ce54-e1c2-020c-493202e26239" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_0864ed24-ce54-e1c2-020c-493202e26239" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_e8fd0f39-0d07-8442-4833-5ebc3fe9de2e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_e8fd0f39-0d07-8442-4833-5ebc3fe9de2e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_187bb760-9cde-c4af-d9e1-306e7a6330eb" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_187bb760-9cde-c4af-d9e1-306e7a6330eb" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_DeferredTaxAssetsOperatingLossCarryForwardAndTaxCreditsCarryForward" xlink:label="loc_saic_DeferredTaxAssetsOperatingLossCarryForwardAndTaxCreditsCarryForward_7afbd97f-a5e3-f89c-b615-96a10a1f3007" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_saic_DeferredTaxAssetsOperatingLossCarryForwardAndTaxCreditsCarryForward_7afbd97f-a5e3-f89c-b615-96a10a1f3007" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOtherComprehensiveLoss" xlink:label="loc_us-gaap_DeferredTaxAssetsOtherComprehensiveLoss_97c70d14-75ef-8417-954c-ccefc9bfa5f6" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsOtherComprehensiveLoss_97c70d14-75ef-8417-954c-ccefc9bfa5f6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_d9af76c3-a64a-3b37-1d7d-4e9be8c70af6" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_d9af76c3-a64a-3b37-1d7d-4e9be8c70af6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_b4dece9a-8c95-7770-52f2-bc14b57aa839" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_b4dece9a-8c95-7770-52f2-bc14b57aa839" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_b80864bb-54da-8919-3a7e-ad4de5af52b3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_b80864bb-54da-8919-3a7e-ad4de5af52b3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_4ed01819-014a-ce74-957e-ddc9b0c1d62e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_4ed01819-014a-ce74-957e-ddc9b0c1d62e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_42b61cde-44f6-df44-52b0-1b84b1e28a47" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_42b61cde-44f6-df44-52b0-1b84b1e28a47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_eafacbfa-f592-0957-6cc6-8e08a8157f71" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_eafacbfa-f592-0957-6cc6-8e08a8157f71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_cee36967-7b64-56b0-03ea-66fbd4d14899" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_cee36967-7b64-56b0-03ea-66fbd4d14899" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_cee36967-7b64-56b0-03ea-66fbd4d14899" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/LegalProceedingsAndCommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/LegalProceedingsAndCommitmentsAndContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/OperatingLeases" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/OperatingLeasesFutureMinimumOperatingLeaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_f67237f3-7c78-8a5c-b7b3-17f1eb0b017a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_f67237f3-7c78-8a5c-b7b3-17f1eb0b017a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_ccaff3fc-3d87-e58a-0083-69dda0c10f9d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_ccaff3fc-3d87-e58a-0083-69dda0c10f9d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_39e76369-4fdc-9d5f-860a-45d0795e5fb0" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_39e76369-4fdc-9d5f-860a-45d0795e5fb0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_fe404cae-7fcc-3489-844f-4d90e9776180" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_fe404cae-7fcc-3489-844f-4d90e9776180" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5b651b24-1278-4eab-c840-7002c6d68546" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5b651b24-1278-4eab-c840-7002c6d68546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_36c616b1-40de-90d4-3c05-7e224ce1169a" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_36c616b1-40de-90d4-3c05-7e224ce1169a" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/OperatingLeasesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/OperatingLeasesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/PropertyPlantAndEquipment" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/PropertyPlantAndEquipmentNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_0a08cda9-11b3-e7ac-3fc9-3a23c67d9b96" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_0a08cda9-11b3-e7ac-3fc9-3a23c67d9b96" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/PropertyPlantAndEquipmentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlans" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansAmountsRecognizedInBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_7e70cbd0-3c12-25b5-5c59-d2236b678578" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_ce0a2b9f-7d6d-5f26-0a1b-2f0b2915c2e1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_7e70cbd0-3c12-25b5-5c59-d2236b678578" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_ce0a2b9f-7d6d-5f26-0a1b-2f0b2915c2e1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_e69973b2-6cb8-6605-6335-92ae4455489c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_7e70cbd0-3c12-25b5-5c59-d2236b678578" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_e69973b2-6cb8-6605-6335-92ae4455489c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansAssumptionsUsedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansEstimatedFutureBenefitPaymentDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansFairValueMeasurementPlanAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansObligationsAndFundedStatusDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_6756bfa8-d44d-11e3-e639-2c0d1784c09a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_4a6a9edc-7d09-7c7e-e64b-45faecd35930" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_6756bfa8-d44d-11e3-e639-2c0d1784c09a" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_4a6a9edc-7d09-7c7e-e64b-45faecd35930" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_166d727c-5242-f06b-d573-7921ffbf75e2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_6756bfa8-d44d-11e3-e639-2c0d1784c09a" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_166d727c-5242-f06b-d573-7921ffbf75e2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/RetirementPlansTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/Revenues" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesChangeInEstimatesOnContractsDetails" xlink:type="extended">
    <link:loc xlink:href="saic-20190201.xsd#saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax" xlink:label="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax_9cdd5569-cbd7-d867-4ed2-96a109a12ba3" xlink:type="locator" />
    <link:loc xlink:href="saic-20190201.xsd#saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates" xlink:label="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates_c6cf1e7f-04ca-b3cd-fd71-96a10a037b76" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax_9cdd5569-cbd7-d867-4ed2-96a109a12ba3" xlink:to="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates_c6cf1e7f-04ca-b3cd-fd71-96a10a037b76" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_IncreaseInIncomeFromChangeInContractEstimates" xlink:label="loc_saic_IncreaseInIncomeFromChangeInContractEstimates_c4469a7f-e406-adf9-5715-96a109a89d84" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates_c6cf1e7f-04ca-b3cd-fd71-96a10a037b76" xlink:to="loc_saic_IncreaseInIncomeFromChangeInContractEstimates_c4469a7f-e406-adf9-5715-96a109a89d84" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_DecreaseInIncomeFromChangeInContractEstimates" xlink:label="loc_saic_DecreaseInIncomeFromChangeInContractEstimates_e80d7398-bf68-6249-c98d-96a10a1d5c21" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimates_c6cf1e7f-04ca-b3cd-fd71-96a10a037b76" xlink:to="loc_saic_DecreaseInIncomeFromChangeInContractEstimates_e80d7398-bf68-6249-c98d-96a10a1d5c21" xlink:type="arc" />
    <link:loc xlink:href="saic-20190201.xsd#saic_ChangeInContractEstimatesIncomeTaxEffect" xlink:label="loc_saic_ChangeInContractEstimatesIncomeTaxEffect_f0e84f90-933c-09ee-7cb8-96a10a107234" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_saic_IncreaseDecreaseInIncomeFromChangeInContractEstimatesNetOfTax_9cdd5569-cbd7-d867-4ed2-96a109a12ba3" xlink:to="loc_saic_ChangeInContractEstimatesIncomeTaxEffect_f0e84f90-933c-09ee-7cb8-96a10a107234" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesContractBalancesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesDeferredCostsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesDisaggregationOfRevenuesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesPerformanceObligationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/RevenuesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationFairValueAndValuationAssumptionsOfStockOptionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationScheduleOfPerformanceShareAwardActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationScheduleOfSharedBasedCompensationCostRelatedToStockOptionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationScheduleOfStockBasedCompensationExpenseAndRelatedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationScheduleOfStockOptionActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationScheduleOfVestingStockAwardActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.saic.com/role/StockBasedCompensationTables" xlink:type="extended" />
</link:linkbase>
