Word parts calculate + -ion Pronunciation (UK) IPA (key): /kælkjuˈleɪʃən/ (US) IPA (key): /kælkjəˈleɪʃən/ Audio (UK)(file) Hyphenation: cal‧cu‧la‧tion Noun Singular calculation Plural calculations (uncountable) (mathematics) Calculation is the act of calculating. (countable) (mathematics) A calculation is the answer you get after calculating. Your calculation is wrong. Related words calculate calculator calculusWikiwand - on Seamless Wikipedia browsing. On steroids.