Waist to Height Ratio Calculator

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Waist to height ratio calculator

This calculator divides your waist by your height and shows where the result sits on common screening bands. Keep your waist to less than half your height is the simple rule.

Height (cm)

Waist (cm, measured at the belly button)

Enter your height and waist to see your waist to height ratio.

What this result means

Waist to height ratio divides your waist by your height. The idea is simple: keep your waist to less than half your height. A ratio of 0.5 is a common screening threshold.

Ratio	Common band
Below 0.4	Below the healthy range
0.4 to 0.49	Healthy range
0.5 to 0.59	Increased risk
0.6 and above	High risk

This ratio can flag weight around the middle of the body, which BMI misses. It is a screening guide only. A doctor must interpret it along with your full health picture.

Limits and when to see a doctor

Measure the waist at the belly button, with the tape snug but not tight, after breathing out. The number is rough and varies with how you measure. Waist to height ratio is not accurate for children or pregnant women, and it should not be used to self diagnose. If your ratio sits in the increased or high band, see a doctor who can take your blood pressure, blood sugar, and other factors into account.