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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Analisador de Potencial Muscular e FFMI

A referência definitiva para fisiculturistas. Calcule seu índice de massa livre de gordura (FFMI) e estime seu limite genético natural.

Body Stats

Peso Atual (kg)

Altura (cm)

Gordura Corporal (%)

15%

Bone Structure (For Potential)

Circunferência do pulso (cm)

Circunferência do tornozelo (cm)

FFMI Normalizado

21.0

Estado de Musculação

Intermediário / Atlético

Massa Magra

68.0 kg

Max Potential

46.7 kg

Dica de Musculação

O FFMI é mais útil que o IMC para atletas. Uma pontuação normalizada acima de 25 é frequentemente considerada o 'limite superior' para a maioria dos atletas naturais.

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.