verb
calculate
To determine something using mathematics or careful reasoning.
Where it comes from
Calculate ordinarily means to determine something using mathematics or careful reasoning. Calculate comes from Late Latin calculare, to count or reckon, derived from calculus. A calculus was a small stone or pebble, including one used as a counter on a counting board. The counter's name expanded to the reckoning performed with counters, then to computation generally.
How the meaning developed
The physical stone survives in medical calculus, such as a kidney stone, while mathematical calculus preserves the reckoning branch.
Sources
Definitions adapted from Open English WordNet where applicable. License and attribution. Word-history text comes from Lexifour’s sourced social research; pages are assembled automatically, not individually fact-checked on every update.
Updated 2026-10-05. Report a correction.