# calculus vs callus

> English confusable word pair

## The two words

### calculus
*noun · IPA /ˈkæl.kjʊ.ləs/ · frequency rank #12,930*
Calculation; computation.

### callus
*noun · IPA /ˈkæləs/ · frequency rank #47,517*
A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/calculus-vs-callus