Lean Body Mass Calculator
Calculate your lean body mass (fat-free mass) using the Boer, James, and Hume formulas.
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Lean Body Mass
Lean Body Mass (LBM) is your total weight minus fat mass. It includes muscle, bone, organs, and water. LBM is useful for calculating calorie needs, protein requirements, and medication dosing. These formulas estimate LBM from height and weight alone; for greater accuracy, consider a DEXA scan or body fat measurement.