FFMI Calculator
Calculate your Fat-Free Mass Index from weight, height and body fat percentage.
FFMI
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Lean mass—
This is an estimate for general guidance, not medical advice. For a plan that fits you, talk to a doctor or qualified professional.
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How it works
FFMI = lean mass (kg) ÷ height² (m)Frequently Asked Questions
How does the FFMI Calculator work?
Calculate your Fat-Free Mass Index from weight, height and body fat percentage.
Is this medical advice?
No. It gives general estimates only. For decisions about your health, speak with a qualified professional.