Lean Body Mass Calculator
Calculate your Lean Body Mass (LBM) — total weight minus body fat — using the Boer formula.
What is Lean Body Mass?
Lean Body Mass (LBM) is your weight excluding fat. It is useful for medication dosing and tracking strength-training progress.
How is it calculated?
Boer formula:
- Men: 0.407·kg + 0.267·cm − 19.2
- Women: 0.252·kg + 0.473·cm − 48.3
Frequently Asked Questions
- How is LBM different from FFM?
- LBM technically includes essential fat in organs; Fat-Free Mass excludes all fat. The numbers are usually similar.