WHO Standards · WHtR · Updated 2026

Waist-to-Hip Ratio Calculator

Calculate your Waist-to-Hip Ratio (WHR) and health risk category using WHO standards. Also calculates waist-to-height ratio (WHtR): a stronger predictor of cardiometabolic risk than BMI.

Last updated · WHR and waist cut-offs checked against WHO and NIH

WHO Risk Categories
WHR + WHtR
Metric & Imperial
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Waist-to-Hip Ratio
WHR + WHtR · WHO Standards
in
Measure at narrowest point between ribs and navel, or at navel level
in
Measure at widest point around buttocks
ft
in
📏

Enter your waist and hip measurements to calculate your ratio.

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WHR vs BMI: Why Waist Matters More

The World Health Organization treats a waist-to-hip ratio of 0.90 or more in men, or 0.85 or more in women, as substantially increased risk of heart disease and type 2 diabetes. Divide your waist by your hips: a 36 inch waist and 40 inch hips give 0.90. Enter both above, plus your height, to get your WHR and waist-to-height ratio.

Waist-to-Hip Ratio (WHR) measures the distribution of body fat, not just total body mass. It distinguishes between central obesity (fat stored around the abdomen and organs) and peripheral fat (stored around the hips and thighs). Central abdominal fat, even at normal BMI, is directly associated with metabolic syndrome, cardiovascular disease, type 2 diabetes, and all-cause mortality.

A growing body of research shows WHR and waist-to-height ratio (WHtR) are stronger predictors of cardiometabolic risk than BMI. The "apple vs pear" body shape distinction is clinically meaningful: an apple-shaped person (excess abdominal fat) faces significantly higher health risks than a pear-shaped person (excess hip/thigh fat) at the same BMI and body weight.

Risk LevelMen (WHR)Women (WHR)Health Risk
Low<0.90<0.80Low
Moderatenot used0.80 to 0.84Moderate
High (WHO cut-off)0.90 to 0.990.85 or moreHigh
Very high1.00 or morenot usedVery high

Waist-to-Height Ratio (WHtR): An even simpler and arguably stronger predictor. The rule of thumb is “keep your waist to less than half your height.” A WHtR above 0.50 indicates elevated cardiometabolic risk regardless of BMI. Above 0.60 indicates high risk. WHtR is particularly useful because it adjusts for height, making it applicable across different ethnicities and age groups.

How to Measure Waist Correctly

Two acceptable methods: (1) At the natural waist, the narrowest point between the lower ribs and the navel, typically 1-2 inches above the navel. (2) At the navel: used by the US Navy method. Measure after a normal exhale with relaxed abdomen. Stand upright. Take the measurement 3 times and use the average. Morning measurements (before eating) are most consistent for tracking over time.

Visceral Fat vs Subcutaneous Fat

WHR reflects visceral fat (deep abdominal fat surrounding organs) vs subcutaneous fat (under-skin fat at hips/thighs). Visceral fat is metabolically active, releasing inflammatory cytokines and free fatty acids directly into the liver. High visceral fat is associated with insulin resistance, elevated triglycerides, low HDL, hypertension, and nonalcoholic fatty liver disease: even in individuals with normal BMI.

Ethnic Differences in Risk

WHO acknowledges that South Asian, East Asian, and some other ethnic populations face higher cardiometabolic risk at lower WHR and waist circumference values than European populations. Waist circumference cut-offs also differ: South Asian men >90 cm and women >80 cm signal elevated risk (vs 102 cm/88 cm for Europeans).

Reducing Abdominal Fat

Visceral fat is highly responsive to lifestyle intervention. Most effective: calorie deficit (visceral fat mobilizes more readily than subcutaneous fat during energy restriction), aerobic exercise (particularly moderate-intensity continuous training, 150+ min/week), resistance training (preserves muscle, improves insulin sensitivity), reduced refined carbohydrate and added sugar intake, adequate sleep (sleep deprivation increases visceral fat accumulation), and stress management (cortisol directly promotes visceral fat deposition).

WHO Cut-Offs for Waist and WHR

These are the thresholds from the WHO expert consultation on waist circumference and waist-hip ratio, for adults of European descent.

MeasureMenWomenRisk of metabolic complications
Waistover 94 cm (37 in)over 80 cm (31.5 in)Increased
Waistover 102 cm (40 in)over 88 cm (35 in)Substantially increased
Waist-to-hip ratio0.90 or more0.85 or moreSubstantially increased

In the US, the NIH uses the same 40 inch and 35 inch waist lines to flag higher risk. People of South Asian, Chinese or Japanese origin reach the same risk at smaller waists, and the International Diabetes Federation uses 90 cm (35.5 in) for men and 80 cm (31.5 in) for women in those groups.

Worked Examples Step by Step

A man, 5'10", waist 36 in, hips 40 in

WHR = 36 ÷ 40 = 0.90. That is exactly the WHO cut-off for men, so the calculator shows High Risk. His waist-to-height ratio is 36 ÷ 70 = 0.514, just over the 0.5 line. Taking 2 inches off the waist would bring both measures under their limits: 34 ÷ 40 = 0.85, and 34 ÷ 70 = 0.49.

A woman, waist 32 in, hips 40 in

WHR = 32 ÷ 40 = 0.80, the start of the moderate zone. At a 34 inch waist it would be 0.85, the WHO cut-off for women.

A woman, waist 30 in, hips 38 in

WHR = 30 ÷ 38 = 0.79, low risk.

Units do not matter as long as both measurements use the same one: 91 cm ÷ 102 cm gives the same ratio as inches.

Waist Target for Your Height

A waist-to-height ratio under 0.5 means a waist less than half your height. From 0.5 to 0.59 risk is increased, and at 0.6 or more it is high. Waists below are in inches.

HeightKeep waist under (0.5)High risk from (0.6)
5'0"30 in36.0 in
5'2"31 in37.2 in
5'4"32 in38.4 in
5'6"33 in39.6 in
5'8"34 in40.8 in
5'10"35 in42.0 in
6'0"36 in43.2 in
6'2"37 in44.4 in
6'4"38 in45.6 in

Waist-to-height ratio works the same for men and women and needs no hip measurement, which makes it easier to track at home. Results are estimates of risk, not a diagnosis. If your numbers are high, a doctor can check blood pressure, blood sugar and cholesterol, which tell you much more. You can also compare with your BMI or body fat percentage.

Method and sources. WHR = waist ÷ hip; WHtR = waist ÷ height. Cut-offs: WHO, Waist Circumference and Waist-Hip Ratio, Report of a WHO Expert Consultation (2008); NIH NHLBI adult waist thresholds; International Diabetes Federation ethnic-specific waist values; waist-to-height boundaries from Ashwell M et al., Obesity Reviews (2012). The low and moderate bands below the WHO cut-offs are a common clinical convention, not WHO categories. All examples and table values were computed with the same arithmetic the calculator uses. Estimates only, not medical advice.
This calculator provides estimates based on WHO guidelines. Individual risk depends on many factors including genetics, age, blood pressure, blood glucose, and lipid profiles. Consult a healthcare professional for a complete cardiovascular risk assessment.
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WHR Questions

WHO sets one cut-off: a WHR of 0.90 or more in men, or 0.85 or more in women, means substantially increased risk of metabolic complications. Below 0.90 for men and below 0.80 for women is generally treated as low risk, women at 0.80 to 0.84 are in a moderate zone, and men at 1.00 or more are at very high risk. The lower the number, the more fat is distributed around the hips and thighs (pear shape) rather than the abdomen (apple shape). A lower ratio indicates lower cardiometabolic risk. Note that some ethnic populations face elevated risk at lower WHR values. For Asian adults the waist cut-offs are lower (men 90 cm, women 80 cm).

For cardiometabolic risk, WHR and WHtR are generally superior to BMI because they measure fat distribution rather than just total mass. BMI cannot distinguish between an apple-shaped and pear-shaped body at the same weight and height. Multiple studies have shown that WHR and waist circumference predict cardiovascular events, type 2 diabetes, and mortality better than BMI alone. A 2012 meta-analysis in Obesity Reviews (Ashwell and colleagues) found that waist-to-height ratio was a better predictor of cardiovascular risk factors than either BMI or waist circumference alone. However, BMI, WHR, and waist circumference each capture different aspects of health risk and all are used together in comprehensive assessments.

Stand upright and relaxed. Do not suck in your stomach. Exhale normally before measuring. Place a flexible (not stretchy) measuring tape horizontally around your abdomen at either: (1) the natural waist, the narrowest point between your lower ribs and navel, or (2) at the navel level (belly button). Both are acceptable measurement points; use the same method consistently for tracking over time. Measure 3 times and average the results. Morning measurements before eating give the most consistent baseline. For hips: measure at the widest point around the buttocks with feet together.

Waist-to-height ratio is calculated by dividing waist circumference by height (both in the same unit). A WHtR below 0.5 is considered healthy for most adults: this is the basis for the simple advice "keep your waist to less than half your height." WHtR above 0.5 indicates elevated risk; above 0.6 indicates high risk. WHtR has several advantages over WHR: it requires only one circumference measurement (no hip measurement), adjusts for height (useful across different heights and ethnicities), and has strong evidence as a predictor of cardiovascular disease, diabetes, hypertension, and metabolic syndrome. A major advantage over BMI is that WHtR detects "normal weight obesity": people with normal BMI but excess abdominal fat.

The key distinction is between visceral fat (stored deep in the abdomen around organs) and subcutaneous fat (stored under the skin). Visceral fat is metabolically active in ways that are harmful: it secretes inflammatory cytokines (including IL-6 and TNF-alpha) that promote systemic inflammation; it releases free fatty acids directly into the portal circulation, causing hepatic insulin resistance and non-alcoholic fatty liver disease; it is associated with elevated triglycerides, lower HDL cholesterol, higher LDL particle density, and elevated blood pressure. Hip and thigh subcutaneous fat does not have these effects and may actually be metabolically protective: some research suggests it acts as a metabolic "sink" that buffers excess calories and free fatty acids. This is why people with pear-shaped fat distribution have lower cardiometabolic risk than apple-shaped individuals at the same total body fat percentage.

Yes, this is called "normal weight obesity" or "metabolically obese normal weight" (MONW). It is estimated to affect 20-30% of adults with normal BMI. These individuals have normal total body weight but excess visceral fat and insufficient lean mass. They often have elevated cardiometabolic risk markers despite normal BMI: elevated blood glucose, insulin resistance, high triglycerides, low HDL, high blood pressure, and elevated CRP. WHR, waist circumference, and WHtR detect this condition where BMI fails. Conversely, highly muscular individuals may have elevated BMI with normal WHR and low cardiometabolic risk. Both scenarios illustrate why body fat distribution measurements are essential alongside BMI.

WHR naturally increases with age due to two converging processes: central fat accumulation increases (particularly after menopause in women, driven by declining estrogen, and gradually in men due to declining testosterone) and peripheral fat (hips and thighs) tends to decrease or redistribute centrally. Premenopausal women typically have lower WHR than men of the same age due to estrogen-driven fat storage in hips and thighs. After menopause, this protective fat distribution shifts, and women's cardiovascular risk increases to approach that of men. This age-related WHR increase is one reason cardiovascular disease risk increases substantially after age 50-60 in both sexes.

Visceral abdominal fat (which drives high WHR) is highly responsive to exercise. Most effective approaches: aerobic exercise at moderate intensity (150+ minutes per week) is the most evidence-backed intervention for reducing visceral fat. High-intensity interval training (HIIT) is time-efficient and equally or more effective per unit of time. Resistance training preserves and builds muscle, improves insulin sensitivity, and reduces visceral fat through hormonal mechanisms (increased growth hormone, testosterone, improved insulin sensitivity). Spot-reducing abdominal fat through exercises like crunches is a myth: fat loss occurs systemically, not locally. A combination of aerobic exercise, resistance training, and dietary changes produces the greatest WHR reduction. Studies show visceral fat can decrease by 30-40% with sustained lifestyle intervention even without large changes in total body weight.

Significantly. Estrogen promotes fat storage in hips and thighs (gynoid/pear distribution) and inhibits abdominal fat accumulation, which is why premenopausal women typically have lower WHR than men and lower cardiovascular risk. After menopause, estrogen decline drives fat redistribution to the abdomen, increasing WHR and cardiovascular risk. Testosterone promotes lean mass and is associated with lower WHR in men; declining testosterone with age contributes to increased abdominal fat. Cortisol (the stress hormone) directly promotes visceral fat deposition: chronic psychological stress is a significant contributor to increased WHR. Insulin resistance, common in metabolic syndrome, also promotes visceral fat storage. This hormonal landscape explains why both menopause management and stress reduction can meaningfully improve WHR independent of dietary changes.

WHO and various national health organizations provide absolute waist circumference thresholds as an additional risk indicator. For people of European descent: men above 94 cm (37 inches) have increased risk; above 102 cm (40 inches) substantially increased risk. Women above 80 cm (31.5 inches) increased risk; above 88 cm (35 inches) substantially increased risk. For South Asian, Chinese, Japanese, and other Asian populations, lower thresholds apply: men above 90 cm (35.5 in) and women above 80 cm (31.5 in). For Sub-Saharan African, Eastern Mediterranean, and Middle Eastern populations, thresholds are similar to European values. These absolute waist circumference thresholds complement WHR: someone with a low WHR but large absolute waist circumference may still have elevated risk.

It depends on sex. For a man, 0.90 is the WHO cut-off for substantially increased risk, so it is the point to start bringing the waist down. For a woman, 0.90 is above her cut-off of 0.85 and counts as high risk. Below 0.90 for men and below 0.80 for women is the low-risk zone.

Aim for a waist less than half your height, a waist-to-height ratio under 0.5. That is under 32 inches at 5'4", under 34 inches at 5'8" and under 36 inches at 6'0". A ratio of 0.6 or more (for example 43.2 inches at 6'0") signals high risk.
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