Free tools

Free Fitness Tools

Free and without sign-up: the right number in a few seconds. Every tool explains its formula and answers the common questions underneath.

Where your weight sits for your height — and what BMI cannot tell you.

Daily burn at rest and in motion, then calories and macros for your goal.

Turn a calorie target into protein, fat and carb grams.

Estimate your one-rep max from any working set.

Pace, speed and predicted finish times.

A sensible daily fluid target for your size and training.

Navy tape-measure method estimate.

Healthy weight ranges for your height.

Your race plan from one target time: pace, stations and all 16 passage times.