Waist-to-Hip Ratio
Assess health risk with your waist-to-hip ratio (WHO).
✓ Professional standard Uses internationally recognised clinical formulas — WHO, NHS, CDC, the U.S. Navy method and Mifflin-St Jeor — for screening-grade estimates.
Waist-to-Hip Ratio is a free online medical & health tool from Toolinza. Assess health risk with your waist-to-hip ratio (WHO). It runs entirely in your browser — your data is never uploaded — needs no signup, and works on any device. Toolinza offers 293+ free tools used by people across the UK, USA, Canada, Australia, the EU, India, Pakistan, the Middle East and worldwide.
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About the Waist-to-Hip Ratio
Where you carry fat matters as much as how much you carry, and waist-to-hip ratio is a simple way to gauge it. Fat stored around the middle carries more health risk than fat on the hips, which is why this ratio is a useful complement to BMI.
This Waist-to-Hip Ratio calculator uses the World Health Organization thresholds to assess health risk from two tape measurements, giving you a quick, meaningful screening figure.
How to use the Waist-to-Hip Ratio
- Measure your waist at the narrowest point.
- Measure your hips at the widest point.
- Enter both measurements and your sex.
- See your ratio and the WHO risk category.
Key features of the Waist-to-Hip Ratio
- Uses WHO risk thresholds
- Captures health risk BMI can miss
- Just two tape measurements
- Clear risk categories by sex
- Private — calculated in your browser
How the Waist-to-Hip Ratio works
This calculator applies standard, peer-reviewed formulas used by health professionals and public-health bodies worldwide. Depending on the metric, that includes the World Health Organization (WHO) classification, NHS and CDC guidance, the Mifflin-St Jeor equation for metabolic rate, and the U.S. Navy method for body composition. Inputs are converted between metric and imperial units using exact factors so results are consistent whichever system you use.
All calculations are performed in your browser, so the health information you enter is never sent anywhere.
Tips & best practices
- Measure the waist at its narrowest point and the hips at their widest, standing relaxed, for a consistent ratio.
- A rising ratio over time is a useful early warning even if your weight is stable.
- Combine with waist-to-height ratio and BMI for a fuller picture of your risk.
Standards & accuracy
Uses internationally recognised clinical formulas — WHO, NHS, CDC, the U.S. Navy method and Mifflin-St Jeor — for screening-grade estimates.
Important: these tools provide screening-grade estimates for general information and education only. They are not a medical diagnosis and do not replace professional advice. Always consult a qualified healthcare provider before making health decisions.
Who uses the Waist-to-Hip Ratio?
- Assessing central-fat health risk
- A complement to BMI
- Tracking waist changes over time
- Health screening and education
Privacy & security
The Waist-to-Hip Ratio runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.
Why choose Toolinza?
- 100% free — no hidden charges, watermarks or usage caps.
- Private & secure — your data stays on your device.
- Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
- Works everywhere — desktop, tablet and mobile.
Frequently asked questions
It indicates how much fat you carry around your middle relative to your hips. A higher ratio suggests more central fat, which carries greater health risk than fat stored on the hips.
The WHO sets different risk thresholds for men and women, which the calculator applies. Lower ratios generally indicate lower risk, but discuss your result with a professional.
BMI does not show where fat is stored, while waist-to-hip ratio does. Using both gives a richer picture of your health than either alone.
Yes. The Waist-to-Hip Ratio is completely free with no signup, no watermarks and no usage limits. Toolinza is supported by unobtrusive advertising so every tool stays free.
Absolutely. This tool runs entirely in your browser — your data and files are never uploaded to any server, so everything stays private on your own device.
No. The Waist-to-Hip Ratio works instantly in any modern web browser on desktop, tablet and mobile — Windows, macOS, Linux, Android and iOS.