Waist-to-Height Ratio Calculator
A sharper signal of heart and metabolic risk than BMI. Keep your waist under half your height.
Your result
Enter your waist and height on the left to see your waist-to-height ratio and risk band.
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Frequently asked
What is a healthy waist-to-height ratio?
A ratio between 0.40 and 0.49 is the healthy band: your waist is under half your height. 0.50–0.59 signals increased risk, and 0.60 or above is high risk. The simple rule is to keep your waist less than half your height.
Why is waist-to-height better than BMI?
BMI ignores where fat sits. Waist-to-height ratio captures central (visceral) fat — the fat around your organs that drives cardiometabolic and cardiovascular risk. In multiple studies it predicts mortality and disease better than BMI, and it works across heights and ethnicities.
How do I measure my waist correctly?
Measure at the level of your navel, standing relaxed after a normal breath out. Keep the tape level and snug but not compressing the skin. Use the same unit for waist and height — the ratio is unitless, so centimetres or inches both work.
Does the ratio change the target for men and women?
No. Unlike absolute waist thresholds, the 0.5 boundary applies to both sexes and to adults of different heights, which is part of why it is such a robust, easy-to-remember screening tool.