Body fat calculator

Estimate body fat percentage from body measurements and see the result as a rough guide, not medical advice.

Estimate body fat percentage

Choose the U.S. Navy formula you want to use. The male formula uses height, waist and neck measurements. The female formula also uses hip measurement.

Body fat estimate

The calculator estimates body fat percentage from height and body circumference measurements using the U.S. Navy formula.

Measurements

The formula uses waist and neck measurements, and for female estimates it also uses hip measurement. Use the same unit consistently and measure carefully.

How to measure consistently

Use a flexible tape measure, keep it level and avoid pulling it too tight. Repeating the measurement can help catch obvious mistakes before relying on the estimate.

Formula limitations

Circumference formulas are practical but approximate. They cannot replace professional body composition measurements and may be less accurate for some body types or training backgrounds.

Health note

The result is an estimate and is not medical advice. Body composition can vary by age, training background and measurement method, so use the result as a rough guide only.

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