Body Fat Percentage Calculator

Enter your height and circumference measurements; see your estimated body fat percentage and category using the US Navy method.

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Estimated Body Fat Percentage
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Frequently Asked Questions

The US Navy method estimates body fat percentage using a logarithmic formula based on neck, waist (and for women, hip) circumference measurements. Since it doesn't require calipers or special equipment, it's a reasonably accurate method that can easily be done at home.

Neck: just below the larynx, angled slightly downward. Waist: at the level of the navel, without sucking in your stomach. Hip (for women): at the widest point of the hips. The tape should touch your skin snugly but not compress it.

For men: 2-5% Essential Fat, 6-13% Athletic, 14-17% Fitness, 18-24% Average, above 25% Obese. For women: 10-13% Essential Fat, 14-20% Athletic, 21-24% Fitness, 25-31% Average, above 32% Obese.

The US Navy method is an estimate, not a precise measurement, and can deviate from the true value by a few percentage points. Methods like DEXA scans, hydrostatic weighing, or professional caliper measurement provide higher accuracy. This tool is for informational purposes only.

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