FFMI & Muscular Potential
Fat-Free Mass Index with a natural-ceiling gauge & classification.
Normalized to a height of 1.8 m so results compare across athletes.
Normalized FFMI
21.8 Score
Where you sit on the natural scale
16 Below Avg20 Average25 Natural Limit
Lean Body Mass
70.5 kg
Raw FFMI
21.8
25 is the widely-cited natural ceiling. Elite drug-free bodybuilders have approached ~28.
Did you know?
Muscle is denser than fat — 1 kg of muscle takes up ~20% less space than 1 kg of fat, which is why you can weigh the same but look leaner after a recomp.
Formula
Normalized FFMI = [LBM / H²] + 6.1 × (1.8 − H)
FAQs
What is a good FFMI?
~20 is typical for active lifters, 22 is excellent, and 25 is the recognized natural limit.