Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio, a simple measure of central body fat and health risk.
Keep your waist to less than half your height
The waist-to-height ratio (WHtR) divides waist circumference by height. Research shows it predicts heart disease and diabetes risk better than BMI because it reflects fat stored around the abdomen. In 2022 the UK's National Institute for Health and Care Excellence (NICE) recommended it for adults alongside BMI.
WHtR = Waist ÷ Height (same units)
A waist of 86 cm and a height of 178 cm give 86 ÷ 178 = 0.48, inside the healthy range.
| Ratio | Meaning |
|---|---|
| Under 0.4 | Possibly underweight |
| 0.4 – 0.49 | Healthy |
| 0.5 – 0.59 | Increased health risk |
| 0.6 and over | High health risk |
How to measure your waist
Stand up straight, breathe out normally and measure halfway between your lowest rib and the top of your hip bone, with the tape snug and level. Do not pull your stomach in.
Frequently asked questions
What is a healthy waist-to-height ratio?
Between 0.4 and 0.5 for most adults: keep your waist under half your height.
Is WHtR better than BMI?
It is better at reflecting abdominal fat. Using both gives a more complete picture.
Does it work for children?
Yes. The 0.5 boundary applies from about age 5, unlike BMI, which needs age charts.
Last reviewed October 2026. Results are estimates; check important decisions with a qualified professional.