Free tools · Body Composition
FFMI Calculator
Free · No signupFat-Free Mass Index from weight, height, and body fat — how muscular you are relative to your frame.
Your stats
Normalized FFMI
20.8
Intermediate
Lean mass
144.6 lb
Raw FFMI
20.7
Body fat
18%
Questions
What is a good FFMI?
It depends on sex and height. Normalized scores in the low 20s are already well-trained for many men; the often-quoted ~25 ceiling is a research heuristic, not a lab result for you.
Is this medical advice?
No. These calculators are for wellness and fitness planning only. Talk to a physician before changing how you eat or train.
Related tools
Lean Body Mass Calculator
Fat-free mass and fat mass from scale weight and body-fat percentage, in lb or kg.
Body Fat Calculator
U.S. Navy tape-measure method. Neck, waist, and hip circumferences in, body-fat percentage and category out.
Strength Standards Calculator
Bench, squat, deadlift, press, and row from Untrained to Elite by body weight. See the load that unlocks the next tier.
Hammr Fitness is for wellness and fitness purposes only. It is not medical advice. Consult a physician before starting any exercise or nutrition program. If you have a medical emergency, call emergency services.