0 kg lean mass
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Fat mass
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Lean mass %
Uses the Boer formula. Lean body mass = total weight − fat mass (everything except fat: muscle, bone, organs, water).
Frequently Asked Questions
What is lean body mass?
Lean body mass (LBM) is your total weight minus body fat — it includes muscle, bone, organs and water. Tracking it helps ensure weight loss comes from fat rather than muscle.
Which formula is used?
The Boer formula: men LBM = 0.407·kg + 0.267·cm − 19.2; women LBM = 0.252·kg + 0.473·cm − 48.3.
Estimate your lean body mass (muscle, bone, organs and water) and fat mass using the Boer formula.