Measure waist at narrowest point, hips at widest. The ratio reveals cardiovascular risk from fat distribution — something BMI cannot assess.
Waist-to-hip ratio = waist ÷ hips. WHO cardiovascular risk thresholds: below 0.90 (men) or 0.85 (women) = low risk. WHR measures where you store fat — abdominal fat is more metabolically dangerous than hip/thigh fat. The INTERHEART study found WHR predicts heart attack risk better than BMI.
Written by Ash K · Last updated: June 2026 · Sources cited below
Your waist-to-hip ratio (WHR) measures where your body stores fat — and that location matters more for cardiovascular risk than how much fat you carry overall. Abdominal fat (visceral fat surrounding your organs) is metabolically active and strongly associated with heart disease, type 2 diabetes, and stroke.
Measure your waist at the narrowest point and your hips at the widest point. Divide waist by hips. That ratio tells you more about cardiovascular risk than BMI alone.
Key Takeaway: WHR = waist circumference ÷ hip circumference. According to WHO guidelines, cardiovascular risk is elevated when WHR exceeds 0.90 for men or 0.85 for women. This measures fat distribution, not total fat — a critical distinction BMI cannot make.
Step 1 — Measure your waist. Stand straight. Wrap a flexible measuring tape around your waist at the narrowest point — typically just above your belly button, at the level of your navel. Don't suck in. Breathe normally. Record in cm or inches.
Step 2 — Measure your hips. Wrap the tape around the widest part of your hips/buttocks. Keep the tape level all the way around.
Step 3 — Divide. Waist ÷ Hips = your WHR.
Example: Waist 32 inches, Hips 40 inches → 32 ÷ 40 = 0.80
Tip: Measure at the same time of day (morning is best), in minimal clothing, using the same tape measure. Small differences in placement can shift the ratio. Consistency across measurements matters more than any single reading.
WHO Waist-to-Hip Ratio Risk Thresholds
| Risk Level | Men (WHR) | Women (WHR) |
|---|---|---|
| Low risk | Below 0.90 | Below 0.80 |
| Moderate risk | 0.90–0.99 | 0.80–0.84 |
| High risk | 1.0 or above | 0.85 or above |
Source: WHO Expert Consultation on Waist Circumference and Waist-Hip Ratio (2008).
Note: These thresholds were established from large epidemiological studies linking WHR to cardiovascular events, type 2 diabetes, and all-cause mortality. A WHR above the threshold doesn't diagnose disease — it identifies elevated statistical risk.
BMI tells you if your weight is proportionate to your height. WHR tells you where your fat is stored. Both provide different information — and both have blind spots.
Where WHR excels: Two people with identical BMI of 27 can have very different cardiovascular risk profiles. One stores fat on their hips and thighs (gynoid pattern) — lower metabolic risk. The other stores fat around their abdomen (android pattern) — higher metabolic risk. BMI treats them identically; WHR distinguishes them.
Where BMI excels: BMI is simpler, more widely studied, and doesn't require tape measurements. WHR can be affected by measurement technique.
Research by Yusuf et al. in The Lancet (2005) — the INTERHEART study involving 27,000 participants across 52 countries — found that WHR was a stronger predictor of heart attack risk than BMI.
Warning: Waist-to-hip ratio is a screening tool for fat distribution patterns. It does not diagnose cardiovascular disease, diabetes, or any specific condition. Your provider assesses cardiovascular risk using multiple factors: WHR, blood pressure, lipid panel, blood glucose, family history, smoking status, and age. No single metric is sufficient.
The "perfect" hip-to-waist ratio doesn't exist as a universal number — optimal varies by sex, age, and ethnicity. The WHO thresholds above represent population-level risk boundaries.
Visceral vs. subcutaneous fat. The danger isn't fat under the skin (subcutaneous) — it's fat around your organs (visceral). Visceral fat produces inflammatory cytokines, disrupts insulin signaling, and contributes to metabolic syndrome. WHR is a proxy for visceral fat that doesn't require imaging.
Genetics. Fat distribution is partly inherited. Some people preferentially store fat abdominally regardless of overall weight. This doesn't make the ratio less useful — it makes monitoring it more important.
Hormones. Estrogen promotes hip/thigh fat storage (gynoid pattern). Testosterone promotes abdominal storage (android pattern). Menopause shifts women toward more abdominal storage, which partly explains increasing cardiovascular risk after menopause.
Age. Both men and women tend toward more abdominal fat storage with age, even without weight gain. This is why cardiovascular risk increases with age independent of BMI changes.
Bottom Line: Your waist-to-hip ratio is one of the simplest, most informative cardiovascular screening tools available. Measure waist at the narrowest point, hips at the widest, divide. Below 0.90 (men) or 0.85 (women) is the WHO threshold. Use it alongside BMI and your cholesterol ratio for a more complete cardiovascular risk picture.
How do you calculate the waist-to-hip ratio?
Divide your waist circumference by your hip circumference. Measure waist at the narrowest point (navel level), hips at the widest point. Example: 30-inch waist ÷ 38-inch hips = 0.79.
What is a good waist-to-hip ratio?
According to WHO: below 0.90 for men and below 0.80 for women indicates low cardiovascular risk. These are population-level thresholds — individual context (age, fitness, family history) matters.
Is waist-to-hip ratio better than BMI?
For cardiovascular risk specifically, research (INTERHEART study) suggests WHR is a stronger predictor. But BMI has broader research support for overall mortality risk. Using both provides the most complete picture.
What is the perfect hip-to-waist ratio?
There's no universally "perfect" ratio. Optimal varies by sex, age, and ethnicity. For general cardiovascular health, below 0.80 (women) and below 0.90 (men) are the WHO-recommended targets.
This tool is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider with questions about your health.