Lean Body Mass Calculator
Lean body mass using the Boer formula.
years
Formula: Boer formula
Worth Knowing
Lean body mass is everything that isn't fat — muscle, bone, organs, and the water they hold — and the Boer formula estimates it from just height and weight, so it can't distinguish a heavily muscled frame from a lighter one at the same body size. It's most useful as a baseline for setting protein targets and for tracking whether a diet is preserving muscle, since holding LBM steady while total weight drops is the clearest sign you're losing fat rather than tissue.
How to Use
- Enter Gender into the first field of the Lean Body Mass Calculator.
- Fill in the rest: Age, Weight, Height.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
Boer formula