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Body Fat Calculator â US Navy Circumference Method
Accurately estimate your body fat percentage, lean body mass, and fat mass using official US Navy body measurements.
Body Fat Calculator â US Navy Circumference Method
Accurately estimate your body fat percentage, lean body mass, and fat mass using official US Navy body measurements.
Calculated Results
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Enter your values on the left and click Calculate to view instant results.
How to Use This Body Fat Calculator
- Select gender and enter height and weight.
- Measure neck circumference at narrowest point.
- Measure waist circumference (at navel for men, narrowest point for women).
- Women: Measure hip circumference at widest point.
- Click Calculate Body Fat.
Mathematical Formula & Methodology
Uses the official U.S. Navy Circumference Equations:
Men: %Fat = 495 / (1.0324 – 0.19077(log10(waist – neck)) + 0.15456(log10(height))) – 450
Women: %Fat = 495 / (1.29579 – 0.35004(log10(waist + hip – neck)) + 0.22100(log10(height))) – 450
Women: %Fat = 495 / (1.29579 – 0.35004(log10(waist + hip – neck)) + 0.22100(log10(height))) – 450
Frequently Asked Questions
For men: 10â20% is typical fitness/healthy; 2â5% is essential. For women: 18â28% is healthy; 10â13% is essential.