Fitness calculators
Body Fat Calculator
Estimate body fat percentage from height and circumference measurements using the US Navy method. Private, local math — not a clinical diagnosis.
Estimates only — not medical advice. Formulas are simplified screening tools. Talk to a qualified clinician for health decisions.
Estimated body fat
16.9%
How to use
- Select sex and enter height.
- Enter neck and waist (and hip for female formula).
- Read the estimated body fat percentage.
Features
- US Navy circumference formulas
- Metric inputs (cm)
- Runs fully in your browser
Privacy & how it works
This calculator runs entirely in your browser with JavaScript. Your inputs are not uploaded to ToolsWeb servers for this tool. Privacy Policy · Disclaimer.
FAQ
How accurate is this?expand_more
It is an estimate. Tape placement and body shape affect results. DEXA and other clinical methods differ.
Is this medical advice?expand_more
No. Use it only as a rough personal estimate.
Is this calculator free?expand_more
Yes. No signup required.
Are my numbers uploaded?expand_more
No. Calculations run in your browser. Inputs are not sent to ToolsWeb servers for this tool.
Is this professional advice?expand_more
No. Results are estimates for general information. See our Disclaimer for health, finance, and related tools.