Body Fat Calculator — US Navy Method
Calculate your body fat percentage using the US Navy method (neck, waist, hip measurements). More accurate than BMI for athletes and muscular individuals. Browser-only, no signup.
Body Fat %
US Navy circumference method
How to use this tool
1. Enter your input. Use the form above — all processing happens in your browser, no data is sent to any server.
2. View the result. The output appears instantly below the input. Copy any value with one click.
3. Explore related tools. See the related tools section below for adjacent calculators and converters.
4. Bookmark this page. This tool runs entirely client-side, so it works offline once loaded. Add it to your bookmarks for quick access.
Frequently Asked Questions
Everything you need to know about this currency pair
The US Navy method uses circumference measurements (neck, waist, hip for women) to estimate body fat percentage. The formula was developed by the US Navy in the 1980s for body composition assessment. It's reasonably accurate (within 3-4% of DEXA scans) and requires only a tape measure.