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Body Fat Calculator

Free body fat calculator — estimate body fat percentage using the U.S. Navy tape method from your measurements, in your browser.

SexHeight (cm)Neck (cm)Waist (cm)Hip (female only) (cm)

Runs entirely in your browser — nothing you enter is uploaded or stored.

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Frequently asked questions

Is my data uploaded?

No. This calculator runs entirely in your browser — the numbers you enter are never sent to a server. You can verify it in the Network tab or our Content-Security-Policy.

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