Lean Body Mass Calculator
Calculate lean body mass using the Boer formula. LBM is your total body weight minus fat mass.
Enter weight and height to calculate lean body mass.
Lean Body Mass Formulas
Boer (Male): LBM = 0.407 × W + 0.267 × H − 19.2
Boer (Female): LBM = 0.252 × W + 0.473 × H − 48.3
Boer (Female): LBM = 0.252 × W + 0.473 × H − 48.3
Lean body mass (LBM) includes muscle, bone, organs, and water — everything except stored fat.
Example: Male, 80 kg, 180 cm.
LBM = 0.407 × 80 + 0.267 × 180 − 19.2 = 32.56 + 48.06 − 19.2 = 61.4 kg
LBM = 0.407 × 80 + 0.267 × 180 − 19.2 = 32.56 + 48.06 − 19.2 = 61.4 kg
Why Lean Body Mass Matters
- Better indicator of fitness than total weight alone.
- Used to calculate accurate protein requirements.
- Helps determine medication dosages.
- Useful for tracking body composition changes.
Disclaimer: This is an estimate. For precise body composition, use DEXA scanning or similar methods.
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Last updated: 2026-08-08