Example: Sex: Male · Weight: 170 lb · Height: 70 in → Lean body mass: 131.5 lb.
Body fat mass: 38.5 lb
LBM share: 77.4%
Formula: Boer
Frequently asked questions
How do I calculate lean body mass? Enter your numbers above and the result updates instantly. For example: Sex: Male · Weight: 170 lb · Height: 70 in → Lean body mass: 131.5 lb.
Is this Lean Body Mass Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for lean body mass. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.