Calcvers
FFMI Calculator
Body
Generated
September 24, 2026
Normalised FFMI
22.1
Excellent
Your inputs
- Weight
- 82 kg
- Height
- 178 cm
- Body fat %
- 15 %
Breakdown
- Raw FFMI
- 22
- Lean mass
- 69.7 kg
- Natural ceiling
- ~25
Where your FFMI sits
Where your FFMI sits: 22.1 — Excellent. Scale runs from 16 to 28.
What this means
FFMI (Fat-Free Mass Index) is like BMI but for muscle — it measures how much lean mass you carry relative to your height. Because it's height-adjusted and normalised, it lets you compare muscularity fairly between people of different sizes. Values near 25 represent the approximate ceiling for most drug-free men.
Recommendations
- Use FFMI to set realistic long-term muscle-building goals — most naturals top out around 23–25.
- Recheck it as your body-fat percentage changes; accuracy depends on a good body-fat estimate.
Watch out
- The result is only as accurate as your body-fat input. An off estimate will skew your FFMI.
- The '25 natural limit' is a population guideline, not a hard rule — genetics create outliers in both directions.