Estimate your body fat percentage using the U.S. Navy method.
This calculator estimates body fat percentage using the U.S. Navy circumference method — a formula developed by Hodgdon and Beckett that requires only a tape measure. It correlates strongly with hydrostatic weighing while being far more accessible.
U.S. Navy method
Validated circumference-based formula used by the military for body composition assessment.
Category classification
See where you fall: essential fat, athletes, fitness, average, or obese.
Fat & lean mass
Enter weight to get an exact breakdown of fat and lean tissue.
Metric & imperial
Use cm/kg or inches/lbs — your choice.