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  <link:roleRef roleURI="http://www.northropgrumman.com/role/SegmentInformationCapitalExpendituresandDepreciationandAmortizationDetails7" xlink:type="simple" xlink:href="noc-20201231.xsd#SegmentInformationCapitalExpendituresandDepreciationandAmortizationDetails7"/>
  <link:calculationLink xlink:role="http://www.northropgrumman.com/role/SegmentInformationCapitalExpendituresandDepreciationandAmortizationDetails7" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyData" xlink:type="simple" xlink:href="noc-20201231.xsd#UnauditedSelectedQuarterlyData"/>
  <link:calculationLink xlink:role="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyData" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyDataTables" xlink:type="simple" xlink:href="noc-20201231.xsd#UnauditedSelectedQuarterlyDataTables"/>
  <link:calculationLink xlink:role="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyDataTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyDataDetails" xlink:type="simple" xlink:href="noc-20201231.xsd#UnauditedSelectedQuarterlyDataDetails"/>
  <link:calculationLink xlink:role="http://www.northropgrumman.com/role/UnauditedSelectedQuarterlyDataDetails" xlink:type="extended"/>
</link:linkbase>
