Body Fat Percentage Calculator (US Navy)

Estimate body fat percentage using the US Navy circumference method — waist, neck, and hip measurements.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Estimate body fat percentage using the US Navy circumference method — waist, neck, and hip measurements

Each component has a specific meaning:

  • US Navy circumference method — waist — The us navy circumference method — waist recorded for the scenario being assessed.
  • Neck — The neck recorded for the scenario being assessed.
  • Hip measurements — The hip measurements recorded for the scenario being assessed.

Note: Interpret the body fat % result against the thresholds and context described above.

How to Use

Enter the US Navy circumference method — waist, neck, hip measurements for the scenario you are assessing. Estimate body fat percentage using the US Navy circumference method — waist, neck, and hip measurements. Use the body fat % result to inform your calculation.

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Frequently Asked Questions