Waist-to-Hip Ratio Calculator
Compute your waist-to-hip ratio (WHR) — a simple but powerful indicator of abdominal fat distribution and cardiometabolic risk — using WHR = Waist / Hip. Get your ratio, health-risk category based on WHO thresholds for men and women, and a visual body-proportion schematic.
WHR reflects fat distribution, not total fat
Unlike BMI, which measures overall body mass relative to height, WHR specifically captures where fat is stored. Fat around the abdomen (visceral fat) is metabolically active and strongly associated with cardiovascular disease, type 2 diabetes, and dyslipidemia. Fat around the hips and thighs (gluteofemoral fat) is comparatively benign. Two people with the same BMI can have very different WHRs — and very different health risks. WHR captures that difference.
Sex-specific thresholds
The World Health Organization defines abdominal obesity risk using different WHR thresholds for each sex: for men, WHR ≥ 0.90 is "substantially increased risk" and ≥ 1.00 is "high risk"; for women, WHR ≥ 0.85 is "substantially increased risk" and ≥ 0.90 is "high risk." These differences reflect typical male vs. female fat-distribution patterns and the corresponding baseline risk. Using the correct threshold is essential — a WHR of 0.88 means very different things for a man and a woman.
WHR predicts cardiovascular events
Large epidemiological studies (INTERHEART, Nurses' Health Study, and others) have shown that WHR predicts myocardial infarction, stroke, and type 2 diabetes more strongly than BMI. In the INTERHEART study of 27,000 participants across 52 countries, WHR was the single strongest anthropometric predictor of myocardial infarction, outperforming BMI, waist circumference alone, and even the waist-to-height ratio. For this reason, WHR is included in many clinical risk-assessment guidelines.
How to measure accurately
Measure waist at the narrowest point between the lowest rib and the top of the hip bone — usually just above the navel. Measure hips at the widest point of the buttocks. Keep the tape horizontal and snug, but not compressing the skin. Measure after exhaling normally (not after a deep breath). Take two or three measurements and average them, or better, have someone else measure you to reduce bias. Small measurement errors can shift WHR by 0.02–0.05, so consistency matters.
How to Use This Calculator
The WHR formula links waist circumference, hip circumference, and the resulting ratio. Pick what you want to compute, choose your biological sex for the correct risk thresholds, and read your risk category.
1. Select biological sex
WHO risk thresholds differ for men and women. Choose the option that matches your biological sex for the correct interpretation.
2. Choose what to solve for
Usually you'll solve for WHR. If you know your target WHR and hip size, you can solve for the waist circumference required. If you know your target WHR and waist, solve for hip size.
3. Enter your measurements
Waist at the narrowest point, hips at the widest point. Both in centimetres. Presets cover typical adult ranges from 65–115 cm for waist and 85–130 cm for hips.
4. Read your result and risk category
WHR is reported as a decimal (e.g., 0.80). The verdict badge classifies your result as low, moderate, or high risk, using WHO thresholds for your sex.
5. Check the schematic and chart
The schematic shows the body silhouette with waist and hip lines scaled to your measurements. The risk-zone chart shows where your WHR falls relative to low, moderate, and high-risk bands.
6. Switch to Advanced for depth
Advanced mode adds a chart of WHR vs. waist at fixed hip, a sensitivity check, and companion metrics including waist-to-height ratio, BMI-equivalent context, and the waist reduction needed to reach the low-risk threshold.
What This Tool Offers
Built around the classic WHR formula Waist / Hip, one of the most widely-used anthropometric indicators of cardiometabolic risk.
Sex-specific WHO thresholds
Risk categories follow WHO guidance with different cutoffs for men (0.90 / 1.00) and women (0.85 / 0.90).
Live body schematic
A body silhouette with waist and hip measurement lines scaled to your input, and a readout of WHR and risk category.
Colour-coded risk verdict
Each result is classified as low, moderate, or high risk with a colour-coded badge that matches WHO guidance.
Companion health metrics
Waist-to-height ratio, waist reduction needed to reach low risk, hip increase needed, and body-shape classification (apple vs. pear).
Dual comparison charts
WHR risk-zone chart and an advanced WHR vs. waist chart at fixed hip, with your WHR and the risk threshold both marked.
Reference tables
WHO thresholds by sex, comparison with waist-to-height ratio, and a full reference table for interpreting WHR values.
Reference Tables & Conversions
WHO risk thresholds, typical WHR values, and comparison with related metrics.
WHO WHR risk thresholds
Typical WHR Values by Population
Representative WHR ranges for various adult populations, based on WHO and published epidemiological data.
| Population | Men (mean) | Women (mean) | Notes |
|---|---|---|---|
| Healthy young adults | 0.83 – 0.88 | 0.71 – 0.78 | Typical reference range |
| Middle-aged adults | 0.88 – 0.95 | 0.78 – 0.85 | Gradual increase with age |
| Older adults (60+) | 0.93 – 1.00 | 0.83 – 0.90 | Fat redistribution to abdomen |
| Apple-shaped (android) | > 0.95 | > 0.85 | Central obesity pattern |
| Pear-shaped (gynoid) | < 0.85 | < 0.75 | Peripheral fat pattern |
| Athletes (male) | 0.80 – 0.88 | — | Low visceral fat, high lean mass |
| Athletes (female) | — | 0.68 – 0.76 | High gluteofemoral mass |
| Metabolic syndrome | > 0.90 | > 0.85 | WHO abdominal obesity threshold |
WHR vs. Waist-to-Height Ratio
Both are simple anthropometric indices. Waist-to-height ratio is often recommended as an even simpler screening tool.
| Index | Formula | Low risk cutoff | Notes |
|---|---|---|---|
| WHR | Waist / Hip | < 0.90 (M), < 0.85 (F) | Sex-specific; reflects fat distribution |
| Waist-to-height ratio | Waist / Height | < 0.50 | Same cutoff for both sexes |
| Waist circumference alone | Waist | < 94 cm (M), < 80 cm (F) | WHO abdominal obesity thresholds |
| BMI | kg / m² | 18.5 – 24.9 | Overall body mass, not distribution |
| Body fat % | Various methods | 10–20% (M), 18–28% (F) | Total fat, not distribution |
Variable Reference
| Symbol | Meaning | Typical range | Units |
|---|---|---|---|
| WHR | Waist-to-hip ratio | 0.65 – 1.20 | dimensionless |
| W | Waist circumference | 60 – 130 | cm |
| H | Hip circumference | 80 – 140 | cm |
| WHtR | Waist-to-height ratio | 0.35 – 0.80 | dimensionless |
| BMI | Body mass index | 15 – 45 | kg/m² |
What Does WHR = Waist / Hip Measure?
The waist-to-hip ratio is a simple, inexpensive anthropometric index that captures how body fat is distributed between the central (abdominal) region and the peripheral (gluteofemoral) region. Unlike BMI, which reflects overall body mass relative to height, WHR distinguishes between two very different patterns of fat storage: an "apple" shape with fat concentrated around the waist, and a "pear" shape with fat concentrated at the hips and thighs. This distinction matters because abdominal fat — especially visceral fat surrounding the internal organs — is metabolically active and strongly associated with cardiovascular disease, insulin resistance, and type 2 diabetes, while gluteofemoral fat is comparatively protective.
WHR Formula
The defining relationship is:
Both measurements should be in the same units (typically centimetres or inches), so the ratio is dimensionless. Rearranged to solve for the other two quantities:
Hip = Waist / WHR
The related waist-to-height ratio is:
WHR Variables
| Symbol | Meaning | Notes |
|---|---|---|
| WHR | Waist-to-hip ratio | Dimensionless; typical adult range 0.65–1.20 |
| W | Waist circumference | Measured at narrowest torso point |
| H | Hip circumference | Measured at widest gluteal point |
| WHtR | Waist-to-height ratio | Alternative index; same cutoff for both sexes |
How Each Variable Affects WHR
WHR increases when waist circumference increases relative to hip circumference, or when hip circumference decreases relative to waist. In practice, the ratio is most sensitive to changes in waist size: a 5 cm increase in waist at constant hip raises WHR by about 0.05 — enough to move a person from low to moderate risk. Hip circumference changes more slowly in adults, so most short-term change in WHR is driven by the waist.
Because WHR is a ratio, it can be misleading in people at the extremes of body size. A very lean person with narrow hips and a narrow waist can have a high ratio despite low total body fat, while a person with wide hips and a large waist can have a moderate ratio despite high visceral fat. For this reason, WHR is best interpreted alongside waist circumference alone, waist-to-height ratio, and other risk factors such as blood pressure, lipids, and fasting glucose.
WHR Calculation Examples
WHR = 80 / 100 = 0.800
For a male: low risk (below 0.90 threshold) · For a female: low risk (below 0.85 threshold)
WHR = 95 / 100 = 0.950
For a male: moderate risk (0.90–0.99) · For a female: high risk (≥ 0.90)
Waist = 0.90 × 100 = 90.0 cm
To reach low risk, this person would need to reduce waist from 95 cm to below 90 cm.
Hip = 78 / 0.85 = 91.8 cm
In practice, reducing waist is more effective than changing hip circumference.
Frequently Asked Questions
Men and women naturally have different fat-distribution patterns. Men tend to store more fat abdominally (visceral and subcutaneous), while women tend to store more fat at the hips and thighs (gluteofemoral). As a result, the same WHR value corresponds to a higher absolute abdominal fat burden in women than in men. The WHO thresholds reflect this: men are considered at substantially increased risk at WHR ≥ 0.90 and high risk at ≥ 1.00, while women are at substantially increased risk at ≥ 0.85 and high risk at ≥ 0.90. Using the wrong threshold for your sex would give misleading risk information.
For many outcomes, yes. Studies such as INTERHEART (27,000 participants across 52 countries) found that WHR was a stronger predictor of myocardial infarction than BMI, waist circumference alone, or even the waist-to-height ratio. WHR captures fat distribution, which is more closely linked to cardiometabolic risk than total body mass. That said, no single anthropometric index is perfect. BMI still has value for population-level screening, and a comprehensive risk assessment should consider blood pressure, lipids, fasting glucose, smoking, family history, and other factors.
For waist: stand relaxed, breathe out normally, and measure at the narrowest point of the torso — usually just above the navel or midway between the lowest rib and the top of the hip bone. For hips: stand with feet together and measure at the widest point of the buttocks, keeping the tape parallel to the floor. Use a flexible, non-stretch tape. Keep it snug but not compressing the skin. Take two or three measurements and average them. Ideally, have someone else measure you — self-measurement tends to underestimate waist and overestimate hip in some studies.
WHR changes substantially during childhood and adolescence as the body grows and fat distribution shifts. Adult thresholds are not appropriate for children. Pediatric WHR should be interpreted against age- and sex-specific reference percentiles, which vary by population. For children and adolescents, BMI-for-age percentile is generally the preferred screening tool, supplemented by waist circumference percentile charts. If you are concerned about a child's weight or fat distribution, consult a pediatrician rather than relying on adult WHR thresholds.
WHR is less informative for very muscular or very lean individuals. A bodybuilder with a narrow waist and narrow hips may have a high WHR despite very low body fat. Conversely, a very lean distance runner with wide hips may have a low WHR despite having almost no fat. WHR is a population-level screening tool; for athletes, more direct measures such as DEXA body-fat percentage, visceral fat imaging, or waist-to-height ratio may give a better picture of health risk.
WHR is improved primarily by reducing waist circumference, which reflects a reduction in abdominal fat. The most effective strategies are: reducing overall calorie intake, increasing physical activity (especially aerobic exercise plus resistance training), reducing added sugar and refined carbohydrate intake, improving sleep quality, and managing stress. Resistance training can also increase hip and gluteal muscle mass, which reduces WHR from the other direction. Changes take time — aim for a gradual loss of 0.5–1.0 cm of waist circumference per month, and re-measure every 4–8 weeks. Because WHR is a ratio, avoid dramatic short-term dieting, which can cause loss of lean mass along with fat.
Yes. WHR does not distinguish between visceral fat (metabolically harmful, around the organs) and subcutaneous abdominal fat (less harmful). It is affected by measurement technique and can vary by 0.02–0.05 with small measurement differences. It is less informative in people at the extremes of height, body size, or muscularity. And it is a ratio, which means that someone with both narrow waist and narrow hips can have a high WHR despite low total body fat. For these reasons, WHR is best used alongside other measures — waist circumference alone, waist-to-height ratio, BMI, and clinical biomarkers — rather than as a stand-alone risk assessment.
Variables
| Symbol | Quantity | Unit |
|---|---|---|
| WHR | Waist-to-hip ratio | |
| waist_circumference | Waist circumference | cm |
| hip_circumference | Hip circumference | cm |
What it means
The waist‑to‑hip ratio (WHR) is an anthropometric measure that compares the circumference of the waist and hips. It is used as an indicator of central obesity and associated health risks. A higher WHR (greater than 0.9 for men, 0.85 for women) indicates a higher proportion of abdominal fat, which is linked to increased risk of cardiovascular disease, type 2 diabetes, and metabolic syndrome. It is more informative than BMI in assessing risk from fat distribution. WHR is used in clinical and epidemiological studies, and in fitness assessments. Understanding WHR helps in identifying those at higher risk and in tailoring interventions.
Worked example
Waist‑to‑Hip Ratio – Two Detailed Examples
Real‑World| Parameter | Value |
|---|---|
| waist (cm) | 80 |
| hip (cm) | 95 |
| Parameter | Value |
|---|---|
| waist | 90 |
| hip | 100 |
Common mistakes
- Waist circumference: Measure at the narrowest point between the ribs and iliac crest.
- Hip circumference: Measure at the widest point of the buttocks.
- Both in the same units: Use cm or inches – ratio is dimensionless.
- Interpretation: WHR > 0.9 (men) or >0.85 (women) indicates increased cardiovascular risk.
- Limitations: Does not reflect total body fat – waist circumference alone is also useful.
Applications
Waist‑to‑hip ratio (WHR) is a measure of abdominal obesity, calculated by dividing waist circumference by hip circumference. It is a better predictor of cardiovascular disease risk than BMI alone, as it reflects visceral fat. Healthcare professionals use WHR to screen for metabolic syndrome, to assess risk for heart disease and type 2 diabetes, and to monitor changes in body fat distribution. A WHR above 0.90 in men and 0.85 in women is associated with increased health risk. By measuring WHR, clinicians and individuals can identify those who may benefit from lifestyle changes. This simple measurement is a valuable tool in preventive medicine and health promotion.
- Cardiovascular and metabolic risk screening
- Assessment of central obesity and visceral adiposity
- Monitoring of lifestyle interventions for weight loss
- Public health surveillance of obesity trends
- Clinical research on risk factor modification
Related calculators · Physiological Systems
Recently updated formulas
Suggest an improvement
Found a mistake? Have a better example? Let us know.
You may send up to 3 suggestions per 24 hours.