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Estimate body fat percentage using the standard U.S. Navy circumference method based on height, neck, waist, and hip measurements.
Category: Fitness (14–17%)
175 cm
85 / 38 cm
83.0%
2–5%
6–13%
14–17%
18–24%
≥ 25%
Anthropometric circumference estimate results.
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Body Fat Percentage & Composition Calculator. Estimate your body fat percentage, fat mass, and lean mass using US Navy anthropometric circumference measurements. ZechKit provides this tool completely free and online, optimized for instant, accurate computations directly inside your web browser.
A Body Fat Calculator estimates the proportion of adipose fat tissue relative to total body weight using the US Navy circumference method.
Measurement Protocol: Men measure neck and waist circumferences; women measure neck, waist, and hip circumferences along with height.
Body Fat Categories: Essential Fat (Men: 2%–5%, Women: 10%–13%), Athletes (Men: 6%–13%, Women: 14%–20%), Fitness (Men: 14%–17%, Women: 21%–24%), Average (Men: 18%–24%, Women: 25%–31%), and Obese (Men: ≥ 25%, Women: ≥ 32%).
Fitness Tracking: Tracking changes in body fat percentage provides a clearer picture of body recomposition progress than scale weight alone, especially when building muscle while losing fat.
How does the US Navy body fat formula work?
The formula estimates body density and fat percentage using logarithmic relationships between body height and neck, waist (and hip for women) circumferences.
