FFMI Calculator — Free Online Fat-Free Mass Index Tool
Calculate your fat-free mass index from your weight, height, and body fat percentage.
kg
cm
%
Your FFMI Results
21.0
is your fat-free mass index
Adjusted to 1.80 m height21.0
Fat-free mass68.0 kg
Height-Adjusted FFMI Reported by Kouri et al. (1995)
| Group | Height-Adjusted FFMI |
|---|---|
| Male athletes who had not used steroids (74) | Up to 25.0 |
| Mr. America winners, 1939–1959 (20) | Average 25.4 |
| Many of the steroid users in the study (83) | Above 25.0, some above 30 |
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About this calculator
Sources
- Kouri EM, Pope HG Jr, Katz DL, Oliva P. Fat-free mass index in users and nonusers of anabolic-androgenic steroids. Clin J Sport Med. 1995;5(4):223-8: pubmed.ncbi.nlm.nih.gov
Disclaimer: This calculator is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional for medical guidance.
Last updated: November 8, 2026