AI Website GeneratorEstimate your body fat percentage using the U.S. Navy circumference method.
The U.S. Navy method provides an estimate, not a direct measurement of body fat. Results may be less accurate for highly muscular individuals and people with unusual body proportions.
Body fat percentage describes how much of your total body weight consists of fat mass. Unlike body weight alone, it provides additional information about body composition. Tracking body fat estimates alongside other measurements may help you evaluate changes during training.
| Measurement | How to Measure |
|---|---|
| Height | Stand upright without shoes. |
| Neck Circumference | Measure just below the Adam's apple, keeping the tape snug without compressing the skin. |
| Waist – Male | Measure horizontally around your abdomen at belly button level. |
| Waist – Female | Measure around the narrowest part of your waist. |
| Hips – Female | Measure around the widest part of your hips and buttocks. |
The U.S. Navy circumference method estimates body fat percentage using height and specific body measurements. It uses different equations for males and females. Measurements are converted to inches for the calculation, even when you choose metric units.
For bodybuilding and strength training, body composition can be more informative than scale weight alone. Estimated fat mass and lean body mass can help you monitor changes during muscle-building and fat-loss phases.
For additional insight, consider other methods such as DXA scans or professional body composition assessments. No single method is perfectly accurate, and results may vary depending on the measurement technique.
Use U.S. customary units to enter your weight in pounds, height in feet and inches, and body circumferences in inches. Switch to metric units to enter kilograms and centimeters. Your values are automatically converted, and the body fat estimate remains based on the same underlying equation.
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