What Is Waist-Hip Ratio (WHR)?
Waist-hip ratio is the numerical ratio of waist circumference to hip circumference. It is a simple, cost-free measurement that quantifies the distribution of body fat — specifically, the degree of central (abdominal) adiposity relative to peripheral (hip and thigh) fat.
Unlike BMI, which only measures weight relative to height, WHR distinguishes between two fundamentally different fat distribution patterns with very different health consequences: android (apple-shaped) fat distribution, where fat accumulates around the abdomen, and gynoid (pear-shaped) distribution, where fat accumulates around the hips and thighs.
WHO Risk Classification
| Risk Level | Men (WHR) | Women (WHR) | Associated Risks |
|---|---|---|---|
| Low Risk | < 0.90 | < 0.80 | Low cardiovascular and metabolic risk |
| Moderate Risk | 0.90–0.99 | 0.80–0.84 | Moderately increased risk of CVD, T2DM |
| High Risk | ≥ 1.00 | ≥ 0.85 | Significantly elevated risk; clinical evaluation warranted |
Why WHR Is a Better CVD Predictor Than BMI
The INTERHEART study (2004), involving 27,000 participants across 52 countries, found that WHR was a substantially stronger predictor of myocardial infarction (heart attack) risk than BMI across all regions, ethnic groups, and both sexes. Visceral (intra-abdominal) fat — which correlates with waist circumference — is metabolically active tissue that promotes insulin resistance, dyslipidaemia, inflammation, and hypertension through release of pro-inflammatory cytokines and free fatty acids.
Waist Circumference Alone
Waist circumference alone is also a validated cardiovascular risk marker:
| Population | Increased Risk | Substantially Increased Risk |
|---|---|---|
| Men (European) | ≥ 94 cm (37 in) | ≥ 102 cm (40 in) |
| Women (European) | ≥ 80 cm (31.5 in) | ≥ 88 cm (35 in) |
| South Asian / Chinese men | ≥ 90 cm | — |
| South Asian / Chinese women | ≥ 80 cm | — |
Frequently Asked Questions
What is a good waist-hip ratio for women?
Can I reduce my waist-hip ratio?
Should I use WHR or BMI to assess my health risk?
Is WHR accurate for all ethnic groups?
Related Tools
Combine WHR with BMI Calculator for a complete body composition risk assessment. For cardiovascular disease risk beyond body measurements, see Framingham Risk Score. For body fat percentage, see Body Fat Percentage Calculator.
References
- World Health Organization. Waist Circumference and Waist-Hip Ratio: Report of a WHO Expert Consultation. WHO Press, 2008.
- Yusuf S, et al. "Obesity and the risk of myocardial infarction in 27,000 participants from 52 countries: a case-control study (INTERHEART)." Lancet. 2005;366(9497):1640-1649.
- Alberti KG, et al. "Harmonizing the metabolic syndrome." Circulation. 2009;120(16):1640-1645.