FFMI Calculator
Fat-Free Mass Index, an advanced measure of muscle development relative to your height.
Your Composition
FFMI compares muscle mass relative to your height.
Gender
Height *
cm
Weight *
kg
%
Enter height, weight and body fat % to see your FFMI.
Measure your Fat-Free Mass Index to evaluate muscularity and physique development. Popular among athletes and advanced fitness enthusiasts.
How this is calculated
Formula: FFMI = LBM (kg) ÷ Height² (m)
Adjusted FFMI = FFMI + 6.1 × (1.8 − height in m), normalizing to a 1.8 m reference height.
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These calculators provide general health and fitness estimates based on the information entered and standard scientific formulas. They are intended for educational and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment.
Results may vary based on individual health conditions, body composition, lifestyle, medications, and clinical factors. Always consult a qualified healthcare professional or doctor before making significant changes to your diet, exercise routine, medication, or health management plan.