Calculate body fat percentage with the US Navy method. Free body fat calculator with visual guides, animated diagram, and category breakdown.
Calculate your body fat percentage using the scientifically validated US Navy method — also used as the Army body fat calculator standard. Enter neck, waist, hip (women), and height measurements to get an accurate body fat estimate. Works as a body fat content calculator, body fat ratio calculator, and fat index calculator. Features animated body silhouette that changes with your results, visual measurement guides showing exactly where to measure, a color-coded gauge, lean body mass and fat mass breakdown, and a reference table comparing male and female body fat categories with visual descriptions of each range. Also functions as a lean mass calculator to determine lean body mass, and as an army height weight calculator and army tape test calculator for military body composition assessments. Use it as a male body fat calculator or female body fat percentage estimator.
The US Navy method is accurate within 1-3% for most people. It is the most reliable method that does not require special equipment. DEXA scans and hydrostatic weighing are more precise.
Women store fat differently than men, with more subcutaneous fat around the hips and thighs. The hip measurement improves accuracy for the female formula.
For men, 14-17% is considered "Fitness" level and 18-24% is average. For women, 21-24% is "Fitness" and 25-31% is average.
Lean body mass is your total weight minus fat mass. It includes muscle, bone, organs, and water — everything except stored body fat.
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