The verb calculate has 6 senses (first 2 from tagged texts)
1. (26) calculate, cipher, cypher, compute, work out, reckon, figure -- (make a mathematical calculation or computation)
2. (3) calculate, estimate, reckon, count on, figure, forecast -- (judge to be probable)
3. account, calculate -- (keep an account of)
4. forecast, calculate -- (predict in advance)
5. calculate, aim, direct -- (specifically design a product, event, or activity for a certain public)
6. count, bet, depend, look, calculate, reckon -- (have faith or confidence in; "you can count on me to help you any time"; "Look to your friends for support"; "You can bet on that!"; "Depend on your family in times of crisis")