Free calculators

Fitness calculators, free.

Five of the most useful tests from Ritual Lab, ready to use in your browser. The app has all 15, and keeps every result.

Estimate your 1RM from any set, without testing a true max.

Estimate your aerobic fitness with two established field tests: the Cooper 12-minute run or the Rockport 1-mile walk..

Find your five training zones from your age and resting heart rate.

A simple check of your CO₂ tolerance.

Compare your powerlifting total fairly across bodyweights.

Keep exploring

All 15 calculators in the app.

Six pillars, one number.

Train and recover better.

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