calculation
US /ˌkæl.kjəˈleɪ.ʃən/
UK /ˌkæl.kjəˈleɪ.ʃən/

1.
the process of assessing or determining something by mathematical means
:
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The engineer performed a complex calculation to determine the bridge's load capacity.
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The tax calculation was incorrect, leading to an overpayment.
2.
a forecast or plan made by assessing the circumstances
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His calculation was that the market would recover by next quarter.
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Every decision was made with careful calculation of the risks involved.