BVK lean mass tool
Measure relative mass.
Skip the mythology.
Relate estimated fat free mass to height. See raw FFMI, a value adjusted to 1.80 metres and the body composition figures behind the result.
What this number means
FFMI describes estimated fat free mass relative to height. It is not a direct measure of muscle mass, strength, health or performance. The result inherits every error in the body fat estimate.
The widely repeated FFMI value of 25 came from a study of male athletes. It is not a universal natural limit and cannot prove or disprove drug use. Later athlete samples have included many values above 25.
Method and context sources: Kouri and colleagues, 1995, and Harty and colleagues, 2018.