Lean Body Mass Calculator
Estimate lean body mass using multiple research-based formulas.
Three formulas
LBM in kg + lb
Quick comparison
Why lean mass matters
Lean body mass reflects the weight of everything in the body except fat. It can guide protein targets and training goals.
Assumptions
Boer, James, and Hume formulas estimate lean mass from height and weight and assume adult body proportions.
Formula differences
Different formulas estimate lean mass from height and weight. Compare them to see a realistic range.