Lean Body Mass by Height Calculator
Calculate lean body mass by height and weight to understand your body composition. Find ideal lean body mass percentage and track muscle mass versus fat mass accurately.
Quick Answer
Lean Body Mass = Total Weight × (100% - Body Fat %). 150lb person at 20% body fat = 120lb lean mass. Ideal LBM varies by height and gender. Essential for fitness and health assessment.
Calculator Preview
Lean Body Mass: 143.5 lbs
Fat Mass: 31.5 lbs
LBM Percentage: 82%
Key Features
LBM Calculation
Calculate lean body mass
Body Fat Analysis
Track fat vs muscle mass
Gender Specific
Different formulas by gender
Height Consideration
Height-based ideal ranges
How It Works
Enter Body Data
Input weight, height, and gender
Add Body Fat %
Input or estimate body fat percentage
Calculate LBM
System calculates lean body mass
See Analysis
View body composition breakdown
Why Calculate Lean Body Mass?
Fitness Tracking
Monitor muscle vs fat
Health Assessment
Evaluate body composition
Goal Setting
Set realistic targets
Ideal Lean Body Mass by Height
Men: 70-75% Lean Body Mass
Healthy range for men is 70-75% lean body mass. Athletes may have 80-85%. 5'10" man at 150lbs: 105-113lbs lean mass.
Women: 65-70% Lean Body Mass
Healthy range for women is 65-70% lean body mass. Athletes may have 75-80%. 5'6" woman at 130lbs: 85-91lbs lean mass.
Age Considerations
Lean body mass naturally decreases with age due to sarcopenia. Adults lose 3-5% lean mass per decade after age 30.
Height Impact
Taller individuals have more absolute lean mass but similar percentages. Shorter people may have slightly higher lean mass percentages.
Body Fat Percentage Guidelines
Men Body Fat %
- • Athletes: 6-13%
- • Fitness: 14-17%
- • Average:18-24%
- • Obese: 25%+
Women Body Fat %
- • Athletes: 14-20%
- • Fitness: 21-24%
- • Average: 25-31%
- • Obese: 32%+
Lean Body Mass Calculation Methods
Simple Formula
LBM = Total Weight × (1 - Body Fat %). Most accurate if you know your exact body fat percentage.
Boer Formula (Men)
LBM (kg) = (0.407 × Weight) + (0.267 × Height) - 19.2. Provides estimate without body fat measurement.
James Formula (Women)
LBM (kg) = (0.298 × Weight) + (0.107 × Height) - 5.4. Provides estimate without body fat measurement.
BMI Method
Estimates LBM based on BMI and height. Less accurate but useful when body fat % unknown.
Calculate Your Lean Body Mass
Analyze your body composition and track muscle vs fat mass accurately
Use Full CalculatorFrequently Asked Questions
How do I measure my body fat percentage?
Methods include DEXA scan (most accurate), skinfold calipers, bioelectrical impedance analysis (BIA), and Navy/Army circumference formulas. DEXA is considered the gold standard.
Is lean body mass the same as muscle mass?
No. Lean body mass includes muscle, bone, organs, and essential fat. Muscle mass is just the muscle component. About 45-50% of lean body mass is muscle in healthy individuals.
Can I increase my lean body mass?
Yes, through resistance training and proper nutrition. Focus on progressive overload, adequate protein intake (1.6-2.2g per kg), and caloric surplus for muscle growth.
What's a healthy lean body mass percentage?
For men: 70-75%, women: 65-70%. Athletes may be higher. These ranges support optimal health and function while maintaining necessary essential fat.