# formula vs formulae

> English confusable word pair

## The two words

### formula
*noun · IPA /ˈfɔː.mjʊ.lə/ · frequency rank #3,301*
Any mathematical rule expressed symbolically.

### formulae
*noun · IPA /ˈfɔː(ɹ).mjə.li/ · frequency rank #38,402*
plural of formula

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