U.S. Navy circumference method. More telling than BMI for body composition — distinguishes muscle from fat without expensive equipment.
Pick gender and enter circumferences. Estimate appears here, colored by category.
The U.S. Navy formula uses circumference measurements to estimate body fat. Developed for fast field assessment without DEXA or hydrostatic equipment, it’s a useful screen — typically within 3–4% of gold-standard methods for most people.
Disclaimer. The Navy method provides an estimate only. For research-grade accuracy, see DEXA or hydrostatic weighing. Not suitable for very lean trained athletes — formula can underestimate.