FFMI Calculator
Calculate your Fat-Free Mass Index (FFMI) - a more accurate body composition measure than BMI for athletes and fitness enthusiasts.
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About FFMI
The Fat-Free Mass Index (FFMI) is a measure of muscle mass relative to height, similar to BMI but accounting for body composition. It's particularly useful for athletes and fitness enthusiasts as it distinguishes between muscle and fat gain.
FFMI is calculated by dividing fat-free mass by height squared. The normalized FFMI adjusts for height differences, making comparisons more fair between people of different heights.
Men's FFMI Classification
- Below 18: Below Average
- 18-20: Average
- 20-22: Above Average
- 22-23: Excellent
- 23-26: Superior
- 26-28: Suspicion of steroid use
- Above 28: Steroid usage likely
Women's FFMI Classification
- Below 15: Below Average
- 15-17: Average
- 17-18: Above Average
- 18-19: Excellent
- 19-21.5: Superior
- 21.5-25: Suspicion of steroid use
- Above 25: Steroid usage likely
Frequently Asked Questions
⚠️ Medical Disclaimer
This FFMI calculator is for educational and informational purposes only. The results are estimates based on statistical data and should not be considered as medical advice. FFMI classifications are based on population averages and individual variations may exist. For health concerns or fitness planning, please consult with qualified healthcare professionals or certified fitness trainers.