◑ HEALTH Updated July 25, 2026

Lean Body Mass Calculator

Separate muscle from fat without callipers.

Weight (kg)
Height (cm)
Sex
Result
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How it works

The Boer formula estimates lean body mass from height and weight with sex-specific coefficients; fat mass is simply total weight minus that lean figure.

Related tools

◕BMR Calculator◈Calorie Calculator▣Body Fat Calculator

Frequently asked questions

Why track lean mass?

Medication dosing, protein targets and training progress all depend on lean mass rather than total weight.

Is it as good as a DEXA scan?

No, but it is free and consistent, which makes it useful for tracking change over time.

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