Free waist-to-hip ratio calculator
See your waist-to-hip ratio in two seconds. Enter your waist and hip measurements in inches or centimetres and the calculator divides waist by hips to return your WHR, plus your health-risk band for your sex — low, moderate, or high — with the full risk-category chart, updated live, as you type.
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WHO thresholds: male high risk > 1.0, female high risk > 0.85. WHR is a proxy for abdominal obesity risk.
Results are estimates. Consult a professional.
What is waist-to-hip ratio?
Waist-to-hip ratio (WHR) is your waist circumference divided by your hip circumference — a single number that captures where your body stores fat rather than how much you weigh. A lower ratio means your measurements are more evenly distributed; a higher ratio means more of your bulk sits around the middle. This waist-to-hip ratio calculator returns that number the moment you enter your waist and hip measurements, along with the health-risk band it falls into for your sex.
Where BMI tells you weight relative to height, WHR tells you where the weight is. Two people with an identical BMI can have very different ratios — one carrying fat around the hips and thighs, the other around the abdomen — and decades of research show those two patterns carry very different health risks. That is why the WHO, and clinicians worldwide, track WHR alongside weight.
Why abdominal fat matters more than total weight
The reason WHR is more than a vanity metric comes down to one fact: not all body fat behaves the same way. Fat stored around the abdomen is metabolically different from fat stored on the hips, thighs, and seat — and far more closely tied to chronic disease.
- Visceral fat is the problem. A high WHR usually means more visceral fat — the deep fat that wraps around the liver, pancreas, and intestines, rather than the subcutaneous fat you can pinch.
- It is metabolically active. Visceral fat releases inflammatory compounds and free fatty acids straight into the bloodstream, driving insulin resistance, high blood pressure, and abnormal cholesterol.
- Hip and thigh fat is comparatively benign. Lower-body fat is stored subcutaneously and is much less strongly linked to metabolic disease — which is why where you store fat matters, not just how much.
How to measure your waist and hips
WHR is only as accurate as your tape work, and the two measurements go in different places — a common mistake is to measure the waist where trousers sit rather than at its narrowest point. Use a soft cloth tape, measure on bare skin, and stay relaxed.
- Waist. Measure around the narrowest part of your torso, roughly midway between the bottom of your ribs and the top of your hip bone — usually just above the belly button. Breathe out normally; don't suck in.
- Hips. Measure around the widest part of your hips and seat, with your feet together. This is the fullest point of the buttocks, not where a waistband sits.
- Keep the tape level. Make sure it is parallel to the floor all the way around — letting it ride up at the back is the most common error and inflates the result.
- Snug, not tight. The tape should sit flat against the skin without compressing it. Measure each twice and use the average.
A worked example using the waist-to-hip ratio calculator
Sarah measures a 32-inch waist and 40-inch hips. She selects female and enters the two numbers. Here is exactly the arithmetic the calculator runs — waist divided by hips.
Step 1 — Divide the waist by the hips
WHR is a single division: 32 ÷ 40 = 0.80. Because it is a ratio, the inches cancel — she would get the same 0.80 measuring in centimetres (81 ÷ 102).
Step 2 — Match the ratio to her sex's risk band
The calculator compares 0.80 against the bands for women, where below 0.80 is low risk and 0.81–0.85 is moderate. At exactly 0.80 Sarah sits right at the top of the low-risk band — a healthy, balanced distribution.
Now see how a small change shifts the band. If Sarah's waist grew to 35 inches with the same 40-inch hips, her WHR would rise to 0.875 — over the 0.85 cut-off and into the high-risk band, even with no change in her hips. That sensitivity to waist size is the whole point: WHR tracks central fat, which is exactly the fat that matters most.
Waist-to-hip ratio chart: health-risk categories by sex
Once you have a ratio, the question is what it means — and the answer depends on your sex. Women naturally carry more fat on the hips and thighs for reproductive and hormonal reasons, so a healthy WHR is lower for women than for men. The bands below are the widely used sex-specific cut-offs reported by Healthline and most WHR tools, derived from population health data.
| Health risk | Women | Men |
|---|---|---|
| Low risk | 0.80 or below | 0.95 or below |
| Moderate risk | 0.81 – 0.85 | 0.96 – 1.00 |
| High risk | Above 0.85 | Above 1.00 |
Sex-specific WHR risk bands (population-derived; reported by Healthline and most WHR calculators).
Apple vs pear: what your ratio says about fat distribution
WHR is the number behind the familiar 'apple' and 'pear' body-shape labels. They describe the two basic patterns of fat storage, and the ratio is what separates them.
- Apple shape (higher WHR). Weight is carried around the middle, so the waist measurement approaches or exceeds the hips. This is the higher-risk pattern, because it reflects more visceral fat around the organs. It is more common in men.
- Pear shape (lower WHR). Weight sits on the hips, thighs, and seat, so the hips are clearly wider than the waist. This is the lower-risk pattern — lower-body fat is metabolically quieter. It is more common in women.
If you want to put a formal label on your figure, the body shape calculator sorts your bust, waist, and hip measurements into the five named shapes. WHR answers the narrower, health-focused question: how much of your weight is central, and what risk band that puts you in.
WHR vs BMI vs waist-to-height ratio
WHR is one of several quick body-measurement screens, and each answers a slightly different question. None replaces a clinical assessment, but together they give a fuller picture than any one alone.
| Measure | What it captures | Strength | Limitation |
|---|---|---|---|
| WHR (this tool) | Waist ÷ hips — fat distribution | Flags central fat that BMI misses; predicts cardiac risk well | Needs two measurements; hips dilute a large waist |
| BMI | Weight relative to height² | Fast, single screen for population weight status | Can't tell muscle from fat or where fat sits |
| Waist-to-height ratio | Waist ÷ height | Single, simple central-fat screen ('keep waist under half your height') | Ignores hips, so misses the apple/pear distinction |
Three quick screens, each measuring something different. WHR is the one that captures fat distribution.
The practical takeaway: use these together, not in isolation. A normal BMI with a high WHR is the classic warning sign — "normal weight, central obesity" — which a BMI check alone would miss entirely. For a direct read on how much of your body is fat rather than where it sits, the body fat percentage calculator is the complementary tool.
How to improve your waist-to-hip ratio
Your ratio improves when you lose fat from the waist — and the good news is that visceral fat, the kind that drives a high WHR, is often the first fat to respond to lifestyle change. There is no way to spot-reduce the belly, but the central-fat pattern is sensitive to the same levers that improve overall metabolic health.
- Run a modest calorie deficit. Losing weight overall tends to draw down visceral fat first, so a sustainable deficit of 250–500 calories below maintenance shrinks the waist over time.
- Prioritise aerobic exercise. Regular cardio — brisk walking, running, cycling — is especially effective at reducing visceral fat, more so than it changes hip fat.
- Add strength training. Building muscle raises your resting metabolism and helps preserve lean mass while you lose fat from the middle.
- Cut refined carbs and added sugar. Diets high in sugar and refined starch are linked to greater visceral-fat storage; whole foods, fibre, and protein work the other way.
- Sleep and manage stress. Chronic stress and poor sleep raise cortisol, which promotes abdominal-fat storage — so both are genuine levers on your WHR.
Re-measure every few weeks, not daily — WHR moves slowly. Pair this calculator with a calorie deficit calculator to size your target and the BMI calculator to track overall weight status alongside the ratio.
Limitations of waist-to-hip ratio
WHR is a strong, free screening tool, but it is a screen — not a diagnosis. A few honest limitations are worth knowing before you read too much into a single number.
- Two measurements, two chances for error. A high WHR can come from a large waist or unusually narrow hips, and mis-measuring either one skews the result — measure carefully and consistently.
- Large hips can mask a large waist. A genuinely large waist paired with very wide hips can still produce a 'low-risk' ratio, which is why some clinicians prefer waist circumference or waist-to-height alone.
- It doesn't apply to everyone equally. The standard cut-offs are derived mainly from general adult populations and may not fit very muscular builds, pregnant people, or some ethnic groups whose risk thresholds differ.
Sources and methodology
This calculator divides your waist circumference by your hip circumference (WHR = waist ÷ hip) and matches the result to sex-specific health-risk bands. The abdominal-obesity thresholds (>0.90 men, >0.85 women) follow the World Health Organization; the low/moderate/high bands are the population-derived cut-offs reported by Healthline and used across mainstream WHR tools. The health associations reflect published cardiovascular and metabolic research on central adiposity.
World Health Organization — "Waist Circumference and Waist–Hip Ratio: Report of a WHO Expert Consultation" (Geneva, 2008).Healthline — "Waist-to-Hip Ratio: Cut-offs, Ways to Calculate, and More."Frequently asked questions about the free waist-to-hip ratio calculator
About this waist-to-hip ratio calculator
This waist-to-hip ratio calculator runs entirely in your browser. Your measurements never leave your device — nothing is sent to a server, logged, or shared. It divides your waist by your hips and matches the ratio to the sex-specific WHO and population risk bands, updating instantly on every change.
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