More tools · Body composition
Lean Body Mass Calculator
Estimate your lean body mass and fat mass from your height and weight.
How this is calculated
This uses the Boer formula, one of the more widely used equations for estimating lean body mass (everything in your body that isn't fat: muscle, bone, organs, water) from height and weight alone. Like all such formulas, it's a population-based estimate, not a substitute for a DEXA scan or other direct body-composition measurement.