Body Fat % Calculator

U.S. Navy Circumference Method & Composition Breakdown

Circumference Measurements

Biological Sex / Formula Mode

Male formula requires Neck and Waist circumferences.

Height

Total Body Weight

Neck Circumference (Just below Adam's apple)

Waist Circumference (At navel level / narrowest point)

For accurate results, measure directly on skin against relaxed muscle without pulling the tape excessively tight.

Estimated Body Fat

14.5%Fitness / Athletic

Essential (<6%)FitnessHigh (25%+)

Lean Body Mass (LBM)85.5%

64.1kg

Weight of muscle, bones, organs, water, and connective tissue.

Total Fat Mass14.5%

10.9kg

Estimated weight of subcutaneous and essential adipose reserves.

Classification	Men Range	Women Range	Status
Essential Fat	2–5%	10–13%	Biological minimum required for organ function
Athlete / Competition	6–13%	14–20%	High definition, optimal athletic performance
Fitness / AthleticYou	14–17%	21–24%	Healthy fit standard with low health risk
Average / Healthy	18–24%	25–31%	General healthy population average
Above Average / High	25%+	32%+	May increase metabolic strain or cardiovascular stress