About FitCalcs

FitCalcs provides free, browser-based calculators. Every tool runs entirely on your device — nothing you type is sent to a server or stored.

How the numbers are produced

Each calculator uses published formulas and, where relevant, public data sources. Assumptions and methodology are stated on every tool page. Results are estimates for general information and are not professional advice.

Who runs this

FitCalcs is an independent site. Reach us at hello@getfitcalcs.com.

How we make money

The site is supported by display advertising. Ads never influence the output of a calculator.