Lean Body Mass Calculator
Calculate your lean body mass and fat percentage
Gender
Measurement System
Weight
kg
Height
cm
Calculation Method
Your Lean Body Mass Results
Based on scientific formulas
55.2 kg
Body Fat: 21.1%
Lean Body Mass
Body Composition
14.8 kg
Fat Mass
21.1%
Body Fat %
78.9%
Lean Mass %
Results by Different Formulas
About Lean Body Mass
Lean Body Mass (LBM) refers to the total weight of your body minus the weight of all fat mass. It includes muscles, bones, organs, and water - essentially everything except fat.
Calculation Formulas
| Formula | Year | Male Equation | Female Equation |
|---|---|---|---|
| Boer | 1984 | 0.407W + 0.267H - 19.2 | 0.252W + 0.473H - 48.3 |
| James | 1976 | 1.10W - 128(W²/H²) | 1.07W - 148(W²/H²) |
| Hume | 1966 | 0.32810W + 0.33929H - 29.5336 | 0.29569W + 0.41813H - 43.2933 |
Where W = weight in kg, H = height in cm
Why Calculate Lean Body Mass?
- Fitness Tracking: Monitor muscle gain and fat loss more accurately than just tracking weight
- Nutrition Planning: Determine optimal calorie and protein intake based on muscle mass
- Health Assessment: Understand body composition for better health management
- Athletic Performance: Optimize training programs based on muscle mass
Ideal Lean Body Mass Ranges
While ideal LBM varies by individual, here are general guidelines for healthy ranges:
| Category | Men | Women |
|---|---|---|
| Athletic | 70-85% of total weight | 60-75% of total weight |
| Fit | 65-80% of total weight | 55-70% of total weight |
| Average | 60-75% of total weight | 50-65% of total weight |
Limitations
- These formulas provide estimates and may not be as accurate as DEXA scans or hydrostatic weighing
- Results can vary based on ethnicity, age, and fitness level
- Formulas assume average body composition and may not be accurate for highly muscular or obese individuals
- Consult with healthcare professionals for personalized assessments