Body Fat Calculator
Last updated: June 1, 2026Estimate body fat % with the Navy method.
Body Fat Calculator is a free online calculator to estimate body fat % with the Navy method. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Body Fat Calculator
Estimate your body fat percentage with the U.S. Navy circumference method — just a few tape measurements. See your body fat percent and category for men and women. Free, private, no sign-up. It runs entirely in your browser, so it's fast, private and free — no software to install.
- 1Enter your numbers.
- 2See the result update instantly.
- 3Adjust the inputs to compare scenarios.
Free to use
No watermarks and no forced sign-up. Free credits to get started.
Private by design
Runs in your browser — your files never leave your device.
Fast & simple
A clean interface, instant results, and it works on any device.
Body Fat Calculator — frequently asked questions
Is Body Fat Calculator free?
Yes. Body Fat Calculator is free to use — no watermarks and no forced sign-up. New visitors get free credits to start, and you can upgrade any time for more.
Is Body Fat Calculator safe and private?
Body Fat Calculator runs entirely in your browser. Your files never leave your device and nothing is uploaded to a server.
Do I need to create an account to use Body Fat Calculator?
No account is required. Open the tool and start right away.
Does Body Fat Calculator work on mobile?
Yes — it works in any modern browser on phones, tablets and desktops.
Share this tool
Send it to someone who needs it or save the link for later.
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