Health

Body-Fat Percentage Calculator

Estimate adult body-fat percentage from body measurements using the U.S. Navy method.

MyToolPantry.comBody-Fat Percentage Calculator

Body-Fat Percentage Calculator result

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Height (in)Neck below larynx (in)Natural waist (in)Hips at widest point (in)

Estimated body fat32.9%

Measure bare-skin circumferences with a level tape: neck below the larynx; for the male equation, abdomen at the navel; for the female equation, natural waist plus hips at the widest point. This rough circumference estimate can differ materially from clinical measurement. Source: U.S. Navy Body Composition Assessment guidance.

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How this tool works

The estimate applies the displayed U.S. Navy base-10 logarithmic circumference equation to height, neck below the larynx, male abdomen at the navel or female natural waist, and female hips at the widest point. Results outside a broad 2–70% plausibility screen are withheld.

Limits to know

Circumference equations are estimates and are highly sensitive to the specified tape site, tape level and tension, hydration, and selected sex-based equation. Outputs outside 2–70% are withheld as implausible rather than presented as measurements; the method is not equivalent to DXA or clinical assessment.