Calculate (verb)

1. To determine mathematically.
2. To make a mathematical computation.
3. To decide on the basis of reason or logic.

Origin:

Late middle english: from latin calculare, from calculus "pebble, small stone used in reckoning" (used in medieval times for counting on an abacus), diminutive of calx "limestone, pebble".

Examples:

1. He calculated the cost of the project.
2. She calculated the total cost of the trip.
3. He calculated the distance between the two cities.
4. The company calculated the profits.
5. He calculated the odds of winning the lottery.