Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and see your WHO health risk category instantly.
| Risk level | Male threshold | Your WHR |
|---|---|---|
| Low Risk | < 0.90 | 0.82 ← you are here |
| Moderate Risk | 0.90 – 0.99 | — |
| High Risk | ≥ 1.00 | — |
How to use this calculator
Select your gender, then enter your waist and hip measurements using the sliders or number inputs. Your waist-to-hip ratio and WHO health risk category appear instantly. For accurate results, see measurement instructions in the section below.
Understanding your waist-to-hip ratio
The waist-to-hip ratio (WHR) is calculated by dividing your waist circumference by your hip circumference. The resulting number reflects how weight is distributed in your body. Central obesity — excess weight around the waist — is associated with greater cardiovascular and metabolic health risks than weight distributed around the hips and thighs. The WHO defines risk thresholds separately for men and women because body fat distribution differs between sexes.
Frequently asked questions
WHO waist-to-hip ratio health risk thresholds
The World Health Organization defines health risk categories based on WHR as follows. These thresholds are validated against cardiovascular disease and metabolic syndrome outcomes in large population studies.
| Sex | Low Risk | Moderate Risk | High Risk |
|---|---|---|---|
| Male | < 0.90 | 0.90 – 0.99 | ≥ 1.00 |
| Female | < 0.80 | 0.80 – 0.84 | ≥ 0.85 |
Why fat distribution matters, not just total weight
Two people can weigh the same and have very different health outlooks depending on where that weight sits. WHR zeroes in on fat distribution — the apple-shaped pattern of fat around the organs versus the pear-shaped pattern around hips and thighs — and that pattern is what tracks metabolic and cardiovascular risk.
- ·Visceral fat (belly fat) is metabolically active and releases inflammatory cytokines that increase heart disease and diabetes risk — WHR captures this, BMI does not
- ·A person can have a normal BMI with high WHR ("normal weight obesity") and carry significant metabolic risk that would go undetected by BMI alone
- ·Studies show WHR predicts cardiovascular events more accurately than BMI, particularly in women
- ·WHR is useful across different body types and ethnicities where BMI cutoffs may not apply accurately
- ·Improvements in WHR (even without weight loss) indicate favorable shifts in fat distribution that reduce risk
WHR vs. waist circumference vs. waist-to-height ratio
Waist-to-hip ratio is one of three common ways to gauge central fat, and they answer slightly different questions. Knowing what each captures helps you read your own number — and explains why some clinicians prefer one over another.
| Measure | What it captures | Common high-risk cutoff |
|---|---|---|
| Waist-to-hip ratio (WHR) | How fat is distributed — apple vs. pear shape | ≥ 0.90 men / ≥ 0.85 women |
| Waist circumference | Absolute amount of abdominal fat | ≥ 40 in (102 cm) men / ≥ 35 in (88 cm) women |
| Waist-to-height ratio | Waist scaled to body size; works across heights | ≥ 0.50 for most adults |
What the INTERHEART study showed about WHR
The strongest case for WHR comes from INTERHEART, a study of roughly 27,000 people across 52 countries that examined risk factors for a first heart attack. When researchers compared ways of measuring obesity, waist-to-hip ratio was a markedly stronger predictor of heart attack than BMI. In their analysis BMI showed only a modest, partly explained-away link to heart attack, while WHR remained strongly and consistently associated with risk across populations. The takeaway is not that BMI is useless, but that where you carry fat tracks cardiovascular risk better than total mass alone.
Ethnicity affects the cutoffs that apply to you
The standard WHO thresholds were not derived from one single population, and several health bodies recommend lower waist-based cutoffs for some groups. People of South Asian, Chinese, and other Asian descent tend to accumulate more metabolically active visceral fat at a smaller waist, so the same abdominal measurement can carry more risk than it would in a European-descent population. If you belong to a higher-risk group, treat the generic thresholds as conservative and discuss group-specific cutoffs with your clinician rather than assuming a borderline number is safe.