Fat-Free Mass Index (FFMI) is a calculation that accounts for your muscle mass relative to your height. Unlike BMI, it uses your body fat percentage to determine how much of your weight is lean muscle.

What is a 'natural' FFMI limit?

Research by Kouri et al. suggests that a normalized FFMI of 25 is the upper limit for the vast majority of natural (drug-free) athletes. Scores significantly above 25 are rarely achieved without the use of performance-enhancing drugs or exceptional genetics.

How is Maximum Muscular Potential estimated?

This tool uses formulas developed by researchers like Casey Butt, which use bone structure (wrist and ankle circumference) as an indicator of your frame's capacity to support muscle mass.

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Santé et Bien-être

Analyseur de Potentiel Musculaire & FFMI

La référence ultime pour les bodybuilders. Calculez votre indice de masse sans graisse (FFMI) et estimez votre limite génétique naturelle.

Body Stats

Poids Actuel (kg)

Taille (cm)

Masse Grasse (%)

15%

Bone Structure (For Potential)

Circonférence du poignet (cm)

Circonférence de la cheville (cm)

FFMI Normalisé

21.0

Statut Musculaire

Intermédiaire / Athlétique

Masse Maigre

68.0 kg

Max Potential

46.7 kg

Conseil Musculation

Le FFMI est plus utile que l'IMC pour les athlètes. Un score normalisé au-dessus de 25 est souvent considéré comme la limite supérieure pour la plupart des athlètes naturels.

FFMI Scale

18-20: Average. 22-23: Distinctly muscular. 25-26: Extremely muscular (Upper limit for most natural athletes). 26+: Exceptional/Genetic outlier.

Medical Disclaimer: This tool is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.