Lean Body Mass Calculator
Calculate your lean body mass using scientifically proven formulas including Boer, James, Hume, and Peters methods.
LBM Calculation
Enter your details to calculate lean body mass
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If known, provides the most accurate LBM calculation
Lean Body Mass
Enter your details to calculate lean body mass.
About Lean Body Mass
What is LBM?
- Lean Body Mass: Total body weight minus fat mass
- Includes: Muscles, organs, bones, and water
- Uses: Medication dosing, sports nutrition, health tracking
- Difference: Slightly higher than fat-free mass
Formula Accuracy
- Body Fat % Method: Most accurate when BF% is known
- Peters Formula: Recommended for children ≤14 years
- Boer Formula: Good for general adult population
- Hume Formula: Preferred for clinical applications
- James Formula: Moderate accuracy for adults
Clinical Applications
- Medication Dosing: More accurate than total body weight
- Nutritional Assessment: Protein and calorie requirements
- Athletic Performance: Training and recovery optimization
- Health Monitoring: Tracking muscle mass changes
Typical LBM Ranges
| Category | Male (%) | Female (%) |
|---|---|---|
| Athletes | 85-95% | 75-85% |
| Fit Adults | 80-90% | 70-80% |
| Average Adults | 75-85% | 65-75% |