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Calculation
FFMI Calculator
Calculate Fat-Free Mass Index (FFMI), BMR, and body composition from height, weight, and body fat percentage.
Body fat percentage is high; FFMI accuracy may be reduced.
FFMI (Fat-Free Mass Index)
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Adjusted FFMI (Height-Normalized)
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Lean Body Mass (LBM)
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Fat Mass
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BMI
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Basal Metabolic Rate (BMR)
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Estimated Muscle Mass
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Estimated Muscle Rate
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FFMI Rating Scale
Male
Female
* FFMI may not be accurate for men with body fat above 25% or women above 35%.
Comment utiliser
Enter height, weight, body-fat percentage, and sex to get your FFMI (fat-free mass index) along with normalized FFMI, lean body mass, fat mass, BMR, estimated muscle mass, and BMI — each with a visual gauge for context. FFMI measures how much lean mass you carry for your height, making it a better progress metric for lifters than BMI. Values are estimates from standard formulas.
- FFMI and height-normalized FFMI
- Lean body mass and fat mass breakdown
- Basal metabolic rate (BMR)
- Estimated muscle mass and BMI
- Visual gauges for interpretation
Cas d'utilisation
- Tracking muscle-building progress
- Setting realistic physique goals
- Comparing body composition over time
- Understanding what BMI misses for athletes