Lean Body Mass Calculator
Estimate how much of your weight is muscle, bone, organs, and water — everything except body fat.
About this calculator
Lean body mass (LBM) is total weight minus fat mass. The Boer formula is the most widely validated estimate and is used clinically for drug dosing. Typical LBM is 75–90% of body weight for men and 65–85% for women.
Formula
Men: LBM = 0.407×kg + 0.267×cm − 19.2 Women: LBM = 0.252×kg + 0.473×cm − 48.3
Results are estimates for information only — not medical advice. Sources: WHO, CDC, and peer-reviewed research.
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