Lean Body Mass Calculator
Estimate lean mass and fat mass with the Boer formula.
kg
cm
How it works
Uses the Boer formula. Men: 0.407 × weight + 0.267 × height − 19.2. Women: 0.252 × weight + 0.473 × height − 48.3. It is an estimate; body scans measure composition far more precisely.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.