Body Composition
Body Composition
Muscle
Lean Body Mass Calculator
🧮 About this calculator
Lean Body Mass (LBM) is everything in your body that isn't fat — muscle, bone, organs, water, blood. It's a useful metric for setting protein targets (1g per pound of LBM is a common rule) and for normalising drug dosages in clinical settings.
Inputs
📘 Formula & explanation
LBM = weight * (1 - body fat / 100)
Subtract the fat mass (weight * body fat %) from total weight to get lean body mass. The remaining mass includes muscle, bone, organs, water and glycogen.
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