About Lean Body Mass Calculator
Calculate lean muscle weight and fat mass using Boer and James formulas.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Boer Men: 0.407×W + 0.267×H - 19.2 | Women: 0.252×W + 0.473×H - 48.3
Example Calculation
A 75kg male at 180cm has ~59.4 kg of lean body mass.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.