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Waist-to-Hip Ratio Calculator

Assess cardiometabolic risk with the WHO-validated Waist-to-Hip Ratio. Simple two-measurement test with strong predictive power for disease.

What Is Waist-to-Hip Ratio and Why It Matters

The Waist-to-Hip Ratio (WHR) is a simple measurement that divides waist circumference by hip circumference, producing a single number that reflects how body fat is distributed. The World Health Organization 2008 Expert Consultation report established that a WHR above 0.90 for men and above 0.85 for women indicates abdominal obesity and elevated cardiometabolic risk, independent of overall body weight. The reason WHR is so informative is that fat stored around the waist, particularly visceral adipose tissue surrounding internal organs, is metabolically active and releases inflammatory cytokines that impair insulin sensitivity and raise cardiovascular risk. Fat stored in the hips and thighs, by contrast, is largely subcutaneous and may even be protective. Large prospective studies including the INTERHEART study have shown that WHR predicts myocardial infarction risk more accurately than BMI, especially in populations where normal-BMI individuals still carry central fat.

How to Measure Waist and Hips Correctly

Accurate measurement matters because a 1 centimetre error on the waist can shift your classification. Stand upright with feet together and arms at your sides, breathing normally. Measure waist circumference at the midpoint between the bottom of the rib cage and the top of the iliac crest, which usually corresponds to the narrowest part of the torso. Measure hip circumference at the widest part of the buttocks, keeping the tape horizontal around the body. Take each measurement three times and average the results to reduce error. If your WHR is elevated, the most effective interventions include creating a moderate caloric deficit, prioritising resistance training to preserve lean mass, and reducing added sugars and refined carbohydrates which specifically drive visceral fat storage. Aerobic exercise reduces visceral fat even at modest doses of 150 minutes per week.

Frequently Asked Questions

What is a healthy waist-to-hip ratio?▼
According to the World Health Organization, a healthy WHR is below 0.90 for men and below 0.85 for women. Values above these thresholds indicate abdominal obesity and elevated cardiometabolic risk. The ratio is more predictive of heart disease risk than BMI alone because it captures fat distribution rather than just total body weight.
Is WHR better than BMI for predicting heart disease?▼
Research shows that WHR is often a better predictor of cardiovascular events than BMI, particularly in normal-BMI individuals who still carry central fat. The INTERHEART study of over 27,000 participants demonstrated that WHR had a stronger association with myocardial infarction risk than BMI across all ethnic groups studied. Using both metrics together provides the clearest picture.
How do I reduce my waist-to-hip ratio?▼
Reducing visceral fat requires a combination of caloric deficit, resistance training, and aerobic exercise. Prioritise whole foods with adequate protein at 1.6 to 2.2 grams per kilogram of body weight to preserve muscle during weight loss. Studies show that even 150 minutes of moderate aerobic exercise per week reduces visceral fat independently of total weight change.
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