Lean body mass
Boer formula. Muscle, bone, water, organs.
Lean body mass
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Enter weight, height, and sex.
Body fat %
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Fat mass
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Boer formula: Men: 0.407 x kg + 0.267 x cm - 19.2. Women: 0.252 x kg + 0.473 x cm - 48.3.
Lean body mass is everything that is not fat: muscle, bone, water, and organs. It is the number behind smarter protein targets and drug dosing, estimated here with the validated Boer formula.
Boer formula. Muscle, bone, water, organs.
Enter weight, height, and sex.
Validated against underwater weighing, Boer estimates lean mass from weight and height: men 0.407 x kg + 0.267 x cm - 19.2, women 0.252 x kg + 0.473 x cm - 48.3. Subtracting it from total weight gives fat mass and an implied body fat percentage.
Protein needs, creatine doses, and many medications scale better with lean mass than total weight. Tracking lean mass over months also shows whether your training is building muscle or your diet is costing it.