1. To ascertain by computation; reckon: calculating the area of a circle; calculated their probable time of arrival.
2. To make an estimate of; evaluate: calculating the team's chances of winning.
3. To make for a deliberate purpose; design: a sturdy car that is calculated to last for years; a choice that was calculated to please.
4. also cal'late (kāl'āt', -lāt') Chiefly New England
   1. To suppose: "I cal'late she's a right smart cook" (Dialect Notes).
   2. To plan, intend, or count on.

1. To perform a mathematical process; figure: We must measure and calculate to determine how much paint will be needed.
2. To predict consequences.
3. Regional
   1. To suppose; guess.
   2. To count, depend, or rely on someone or something: We're calculating on your help.

Synonyms: These verbs refer to the use of mathematical methods to determine a result. Calculate, the most comprehensive, often implies a relatively high level of abstraction or procedural complexity: The astronomer calculated the planet's position.
Compute applies to possibly lengthy arithmetic operations: computing fees according to time spent.
Reckon, cipher, and figure suggest the use of simple arithmetic: reckoned the number of hours before her departure; had to be taught to read and to cipher; trying to figure my share of the bill.