Waist-to-height & waist-to-hip ratio
Compute in seconds two health indicators that predict cardiometabolic risk better than BMI: the waist-to-height ratio (WHtR) and waist-to-hip ratio (WHR). You just need a tape measure. We give your ratio and risk category.
Waist-to-height ratio
0.46
Healthy
Waist-to-hip ratio
Hip (cm) — optional
Simple rule: your waist should be less than half your height (ratio < 0.5).
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Fat-distribution / cardiometabolic-risk indicators (Ashwell / WHO). Not a substitute for medical assessment.
Why the waist matters more than weight
BMI does not tell where your fat is, and abdominal (visceral) fat around the organs is the most linked to heart disease, type-2 diabetes and hypertension. That is why waist ratios are better predictors. The waist-to-height ratio (WHtR) is your waist divided by your height: the rule is simple — your waist should be less than half your height (WHtR < 0.5). The waist-to-hip ratio (WHR) divides waist by hip and reflects the distribution pattern (apple vs pear); its thresholds depend on sex. Measure fasted, tape not tight, breathing normally, always at the same point.
FAQ
What is a healthy waist-to-height ratio?
Below 0.5 is healthy for adults. 0.5-0.6 is increased risk, above 0.6 is high risk. Below 0.4 may signal underweight. It is the "keep your waist under half your height" rule.
Where exactly do I measure the waist?
At the narrowest point of the torso, usually at or just above the navel. Standing relaxed, not sucking in or squeezing the tape, exhaling normally. Do it the same way to compare over time.
Is it better than BMI?
For fat-related risk, yes: the waist-to-height ratio predicts cardiometabolic risk better than BMI, especially for muscular people or those with abdominal fat despite a "normal" weight.
Difference between waist-height and waist-hip?
WHtR only needs waist and height and is very simple and universal. WHR compares waist and hip to see the fat-distribution pattern and uses sex-specific thresholds.