Body Fat Calculator
Estimate your body-fat percentage using the U.S. Navy circumference method.
Inputs explained
- Gender — Male or Female — changes which measurements are used.
- Height (cm) — Your height in centimetres.
- Neck (cm) — Neck circumference in centimetres.
- Waist (cm) — Waist circumference in centimetres.
- Hip (cm) — women only — Hip circumference in centimetres (required for women).
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: A man at 180 cm with a 40 cm neck and 85 cm waist is roughly 18% body fat.
Frequently asked questions
Is the Body Fat Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Gender, Height (cm), Neck (cm), Waist (cm), Hip (cm) — women only. Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Body Fat Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.