Estimate body fat percentage using the US Navy circumference method with neck, waist, and hip measurements. This Body Fat Calculator is part of our free productivity tools collection on freetoolstouse. It runs entirely in your browser, so your files and inputs stay on your device unless the tool explicitly performs a network check (for example DNS or SSL lookups). There is no signup, no watermark, and no usage cap. Use it whenever you need a fast, accurate result without installing software.
Estimate body fat percentage using the US Navy circumference method with neck, waist, and hip measurements.
Uses the US Navy circumference method. Results are estimates — DEXA, hydrostatic weighing, or professional assessment are more accurate. See also the BMI Calculator.
