Body Fat Calculator

Estimate body-fat percentage from circumference measurements using the US Navy method. Measure consistently; this is an estimate, not a medical body-composition assessment. Calculate it clearly with Figur.

How the body fat calculator works

Estimate body-fat percentage from circumference measurements using the US Navy method. Measure consistently; this is an estimate, not a medical body-composition assessment.

Method and assumptions

Figur applies straightforward arithmetic to the values you enter. The calculation runs locally in your browser and is not stored.

  • The result depends on accurate inputs and units.
  • External factors, fees, taxes, or rules not requested by the calculator are not included.
  • Use the result as a planning estimate and verify any high-stakes decision.

Sources and references

No external data source is required: this calculator uses standard arithmetic and the values you enter.

Worked example

A man (sex code 1) measures 68 in tall, 15 in neck, 34 in waist, and enters 40 in for hips.

The Navy estimate is 11.9% body fat.

Frequently asked questions

How should I measure?

Use a flexible tape, keep it level, and measure relaxed skin without compressing it. Repeat if unsure.

Why can the result differ from a scan?

Tape formulas estimate from body shape and can differ from DEXA, clinical methods, and individual body composition.

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