Estimate Body Fat %

Estimate your body fat percentage using the US Navy method.

Sex

Weight (kg)

Height (cm)

Waist (cm)

Neck (cm)

Hip (Female only) (cm)

Estimated Body Fat %

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Fat Mass

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The Methodology

US Navy Circumference Method

This tool uses the verified professional formula shown above. We cite our sources so you can trust every result.

How it works

The US Navy formula is a widely used method for estimating body fat without expensive equipment. It requires measuring the circumference of your neck, waist, and (for females) hips. Accuracy is typically within 3-4%.