Body Fat Calculator

Estimate body fat % using the U.S. Navy method (in cm).

Sex

Height (cm)

Neck (cm)

Waist (cm)

Estimated body fat

23.5%

Category: Average

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What is Body Fat Calculator?

The FreeGeron Body Fat Calculator lets you estimate your body fat percentage using the Navy or BMI method. Built for speed and simplicity, it works entirely in your browser with no sign-up, no downloads, and no limits. Whether you are a student, professional, creator, or casual user, this free tool gives you fast, accurate results in seconds so you can focus on what matters.

How to use Body Fat Calculator

Open the Body Fat Calculator on this page.
Enter or upload the information required by the tool.
Adjust any available options to match your needs.
Click the action button to get your result instantly.
Copy, download, or share the result wherever you need it.

Common use cases

Tracking everyday health metrics without a smartwatch.
Using Body Fat Calculator to plan diet, exercise, or recovery goals.
Helping coaches and trainers prepare guidance for clients.
Educational reference for understanding personal health numbers.

Frequently Asked Questions

Is the Body Fat Calculator free to use?

Yes, it is 100% free with no sign-up, subscription, or hidden costs.

Do I need to create an account?

No account is required. The tool works instantly in your browser.

Is my data safe?

Yes, your input is processed securely and never sold or shared with third parties.