Free Fitness Calculators

All tools are free, client-side, and save your inputs automatically. No sign-up required.

Strength & Body Recomposition

Estimate your 1RM and get a full training table.

Protein, fat & carbs for cut, bulk, or maintain.

US Navy method — just a tape measure needed.

Visual plate loading guide for any target weight.

Distribute daily protein to maximise MPS.

PPL, Upper/Lower, or Full Body — tailored to you.

Project weight and body fat over time with a chart.

Body Mass Index with WHO category context.

Resting calorie burn via Mifflin-St Jeor.

Total daily calorie burn + cut/bulk targets.

Daily hydration target by weight and activity.

Three medical formulas compared side by side.