The word(s) "calculation" appears 2 time(s) in 2 verse(s) in Quran in Saheeh International translation.

(1) [He is] the cleaver of daybreak and has made the night for rest and the sun and moon for calculation. That is the determination of the Exalted in Might, the Knowing.

(سورة الأنعام, Al-An'aam, Chapter #6, Verse #96)
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(2) The sun and the moon [move] by precise calculation,

(سورة الرحمن, Ar-Rahmaan, Chapter #55, Verse #5)
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