FFMI calculator
Measure how muscular you are for your height. Enter your weight, height and body-fat percentage, and see your fat-free mass index, normalized for height, with your category.
Normalized FFMI adjusts for height. Around 25 is the rough ceiling for a natural, drug-free lifter, so values well above that are unusual.
How FFMI is calculated
First your body-fat percentage splits your weight into fat mass and fat-free mass. FFMI is that fat-free mass divided by your height squared, so it captures muscle relative to frame. The normalized version then adjusts to a standard height so people of different heights can be compared on the same scale.
It is a far better muscularity gauge than BMI, which counts muscle as if it were fat. The often-cited ceiling near 25 marks about the most a natural lifter tends to reach.