LEAN BODY MASS CALCULATOR
Calculate your lean body mass using multiple scientific formulas for accurate body composition analysis
CALCULATE YOUR LEAN BODY MASS
YOUR LEAN BODY MASS
61.5 kg
82% of total weight
RESULTS COMPARISON
Calculations by Different Formulas
| Formula | Lean Body Mass | Category |
|---|---|---|
| Boer Formula | 61.5 kg | Most Accurate |
| James Formula | 60.8 kg | Widely Used |
| Hume Formula | 59.7 kg | Research-Based |
| Body Fat Method | 61.5 kg | Direct Calculation |
What is Lean Body Mass?
Lean Body Mass (LBM) refers to the total weight of your body minus all the weight due to fat. It includes the weight of:
- Muscles
- Bones
- Organs
- Skin
- Body water
Knowing your LBM is essential for:
- Tracking muscle growth during fitness programs
- Determining optimal calorie intake
- Assessing metabolic rate
- Monitoring health conditions
About the Formulas
This calculator uses multiple scientific formulas to estimate lean body mass:
- Boer Formula (2014): Developed for adults aged 18-81, considered the most accurate for diverse populations
- James Formula (1976): Widely used in clinical settings and research studies
- Hume Formula (1966): Developed through extensive research on body composition
- Body Fat Method: Direct calculation when body fat percentage is known (LBM = Weight × (1 – Body Fat % / 100))
For best results, use the average of the formula results.
Interpreting Your Results
Lean body mass percentages typically fall into these categories:
| Category | Men | Women |
|---|---|---|
| Excellent | > 85% | > 78% |
| Good | 75-85% | 68-78% |
| Average | 65-75% | 58-68% |
| Below Average | < 65% | < 58% |
Note: These ranges may vary based on age, fitness level, and individual factors.