Muscle Mass Calculator
Calculate your estimated skeletal muscle mass, Fat-Free Mass Index (FFMI), and protein requirements.
Important Health Disclaimer
This calculator provides general health information based on standard medical formulas and WHO guidelines. Results are for informational and educational purposes only and should not be considered as professional medical advice, diagnosis, or treatment recommendations.
For health concerns, medical conditions, fitness plans, or dietary decisions, please consult with qualified healthcare professionals, licensed physicians, registered dietitians, or certified fitness trainers who can evaluate your individual health status and medical history.
Individual health needs vary significantly. These calculations are general estimates and may not be appropriate for everyone, especially those with existing medical conditions, pregnant women, children, or elderly individuals.
Not a substitute for professional medical advice
Body Measurements
If unknown, use body fat calculator or estimate
Estimated Skeletal Muscle Mass
32.3 kg
43.1% of body weight
Fat-Free Mass
61.5 kg
Fat Mass
13.5 kg
Fat-Free Mass Index (FFMI)
20.08
kg/m2
Above Average
Adjusted FFMI: 20.39
Skeletal Muscle Index
10.55
kg/m2
Average
Protein Requirements
Daily protein: 90g
Per meal (4 meals): ~23g
Muscle gain potential: 0.12-0.25 kg/week
Expected Muscle Mass Range
For men: 40-50% of body weight
Disclaimer: These calculations provide estimates based on population equations. Actual muscle mass can only be accurately measured with DEXA, BIA, or MRI. Results may vary based on individual body composition and measurement accuracy.
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