Gauritanaya

Waist-to-hip ratio calculator

Compare your waist with your hips, and your waist size with the threshold used for your background.

Runs entirely in your browser. Nothing you type is sent anywhere.

Waist
cm
Hips
cm

Measure around the widest part of your buttocks.

The International Diabetes Federation sets waist thresholds by ethnic group, not by country of residence.

Waist-to-hip ratio—

WHO threshold for your sex
—
Waist threshold for your group (IDF)
—
Your waist
—
US clinical threshold (ATP III)
—

For general wellness only. These results are estimates from published formulas and guidelines, not a diagnosis or medical advice. They may not suit pregnancy, children, older adults, athletes or people with health conditions. Talk to a qualified health professional about your health. In an emergency, call your local emergency number.

How to use the waist-to-hip ratio calculator

Waist-to-hip ratio is waist divided by hip circumference. A WHO expert consultation describes a ratio of 0.90 or more in men and 0.85 or more in women as substantially increased risk. Waist size alone is compared with the International Diabetes Federation table: 94 cm (men) and 80 cm (women) for Europid people, 90 cm and 80 cm for South Asian and Chinese people, 85 cm and 90 cm for Japanese people as printed in the IDF table, South Asian values for South and Central Americans, and European values for Sub-Saharan African and Middle Eastern people until more data are available.

  1. Choose units and your sex.
  2. Measure and enter your waist and hips.
  3. Optionally choose your family background.
  4. Read your ratio and how your waist compares with the threshold for your group.

Understanding your result

A ratio at or above 0.90 (men) or 0.85 (women) is described by a WHO expert consultation as substantially increased risk. Your waist alone is compared with the International Diabetes Federation threshold for your ethnic group. Either result is a reason to discuss your health with a professional, not a diagnosis.

Sources

Sources checked on 9 October 2026. Formulas and thresholds are used as published; the wording on this page is our own.

Questions

Why are there different waist sizes for different groups?
Studies found that health risks start at different waist sizes in different ethnic groups. The IDF bases its table on ethnic group rather than country, so a person of South Asian background living in Europe uses the South Asian value.
My group isn’t listed by the IDF. What then?
For groups without their own values, this tool uses the European values and says so. For other Asian groups, the IDF gives no specific value.
Why is the US threshold higher?
The IDF notes that US clinicians are likely to keep using the older ATP III values of 102 cm for men and 88 cm for women.
Is this a diagnosis?
No. It compares your numbers with published ranges for general wellness. Only a qualified health professional can assess your health, taking your history and other tests into account.

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