Calculate your fat-free mass using multiple scientific formulas
--
kg
Lean Body Mass
--
kg
Fat Mass
Body Composition
75%
25%
Lean Mass
Fat Mass
Formula Comparison
Boer Formula--
James Formula--
Hume Formula--
From Body Fat %--
What is Lean Body Mass?
LBM is your total body weight minus fat mass. It includes muscle, bone, organs, and water.
Knowing your LBM helps you set realistic fitness goals and track muscle gain during training.