How to use Waist-to-Hip Ratio Calculator
The waist-to-hip ratio (WHR) calculator divides your waist circumference by your hip circumference and classifies the result against WHO health-risk thresholds by biological sex. Unlike BMI, WHR captures fat distribution — specifically, how much fat is stored around the abdomen versus the hips. Abdominal (visceral) fat is metabolically active and more strongly linked to cardiovascular disease, type 2 diabetes and metabolic syndrome than total body fat or peripheral (hip/thigh) fat.
- Select your unit system (cm or inches) and biological sex.
- Measure your waist at the narrowest point — typically just above the belly button or at the natural waistline.
- Measure your hips at the widest point of the buttocks, keeping the tape level.
- Enter both measurements and click Calculate WHR.
- Review your ratio and risk band against the WHO thresholds.
Your data never leaves your device — 100% private processing.
WHO risk thresholds by sex
The World Health Organization classifies WHR risk as follows: for males — Low risk below 0.90, Moderate risk 0.90–0.99, High risk at 1.00 or above; for females — Low risk below 0.80, Moderate risk 0.80–0.84, High risk at 0.85 or above. These thresholds were established from population studies correlating WHR with cardiovascular outcomes. Because the ratio is dimensionless, it makes no difference whether you measure in centimetres or inches — the result is identical.
| Risk level | Male WHR | Female WHR | Associated risk |
|---|---|---|---|
| Low | < 0.90 | < 0.80 | Lower cardiovascular risk |
| Moderate | 0.90–0.99 | 0.80–0.84 | Increased risk, lifestyle changes advisable |
| High | ≥ 1.00 | ≥ 0.85 | Substantially elevated cardiovascular risk |
WHR vs BMI vs waist circumference
WHR, BMI and waist circumference each capture a different dimension of health risk. BMI relates total weight to height but cannot distinguish fat from muscle. Waist circumference alone is a strong predictor of metabolic risk (>94 cm for men and >80 cm for women by IDF criteria). WHR adds a distributional dimension: two people with the same waist can have very different risk profiles based on hip size. Research suggests WHR may be a better predictor of cardiovascular events than BMI, particularly for women, though combining all three metrics gives the most complete picture.
Worked examples
Woman, waist 85 / hip 100 cm
Inputs: Female, 85 ÷ 100
Result: WHR 0.85 → high risk (WHO ≥ 0.85)
Man, waist 90 / hip 100 cm
Inputs: Male, 90 ÷ 100
Result: WHR 0.90 → moderate-risk band
Glossary
- WHR
- Waist-to-Hip Ratio — waist circumference divided by hip circumference.
- Visceral fat
- Fat stored within the abdominal cavity around organs; metabolically active and high-risk.
- Peripheral fat
- Fat stored in hips, thighs and buttocks; considered lower cardiovascular risk than visceral fat.
- Android obesity
- "Apple-shaped" fat distribution with more abdominal fat — associated with higher metabolic risk.
- Gynoid obesity
- "Pear-shaped" fat distribution with more hip/thigh fat — considered lower cardiovascular risk.
Related reading
Frequently Asked Questions
Why use Waist-to-Hip Ratio Calculator?
- Captures fat distribution — not just total weight — to flag abdominal obesity risk that BMI misses
- Classifies results against WHO thresholds for both male and female biology
- Dimensionless ratio makes results equally valid whether measurements are in cm or inches
- Provides plain-language context on visceral versus peripheral fat risk alongside the ratio value
Common use cases
- Check WHR alongside BMI for a fuller picture of cardiovascular risk at an apparently healthy weight
- Track abdominal fat distribution changes across a 12-week dietary intervention
- Identify whether a high BMI result reflects central obesity or proportionate body composition
- Assess WHR after significant weight loss to confirm reduction in abdominal fat specifically
- Use as a screening metric when discussing metabolic syndrome risk factors in a health-education setting
Get weekly tool tips & updates
New tools, power-user tips, and productivity hacks — delivered free every Friday.
No spam, ever. Unsubscribe with one click.
Related Health & Fitness
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR) and see your category. A simple central-fat screen using the "keep your waist under half your height" rule.
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports metric (kg/cm) and imperial (lbs/ft+in) units. Free online BMI calculator.
Body Fat Percentage Calculator
Calculate your body fat percentage using the US Navy or BMI method. Find your fat mass, lean mass, and fitness category. Free body fat estimator.
Ideal Weight Calculator
Calculate your ideal body weight using 4 proven formulas: Robinson, Miller, Devine, and Hamwi. Find the healthy weight range for your height.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle formula. Free online BMR calculator.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and get personalized calorie and macro targets for weight loss, maintenance, or muscle gain.
Explore all Health & Fitness.