Body Fat Calculator
Estimate body fat percentage with the US Navy method and a BMI-based estimate. Fully in the browser.
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Tool guide
Body Fat Calculator: how it works
Practical information to understand the result and use this tool correctly.
About Body Fat Calculator
Estimate body fat percentage with the US Navy method and a BMI-based estimate. Fully in the browser.
The tool runs directly in the browser for immediate results.
How to use it
- 1Enter the values you want to calculate or process.
- 2The result updates instantly on the same page.
- 3Copy, share, or export the result if the tool allows it.
Frequently asked questions
- Do I need to sign up?
- No. The tool works without an account.
- Are my data uploaded?
- Compatible operations run locally in the browser.
- How accurate is the Navy method?
- It is a widely used circumference estimate. Results are approximate; DEXA or other methods are more precise. Measure consistently.
- Do I need hip measurement?
- Yes for women (waist + hip - neck). Men use waist - neck. Measure at the navel for waist and widest point for hips.