The short answer is 0.85 for women and 0.90 for men: below those values, waist-to-hip ratio is not flagged as elevated by the World Health Organization. The longer answer is that age, ethnicity, hip width and measurement technique all change what a given ratio means. Here is how to read yours without overinterpreting a single number.
Waist-to-hip ratio compares waist circumference to hip circumference. The WHO's widely used cutoffs for elevated risk are:
| Group | Lower risk | Elevated risk |
|---|---|---|
| Women | Below 0.85 | 0.85 or above |
| Men | Below 0.90 | 0.90 or above |
These are population screening thresholds. They identify a pattern — fat stored disproportionately around the waist — that is associated with higher metabolic risk at the population level. They do not diagnose an individual. A ratio above the line is a prompt to look at the whole picture, not a verdict.
For the arithmetic, examples and a shape-based chart, see the waist-to-hip ratio chart.
Men and women store fat differently. Men are more likely to accumulate fat in the abdominal region, while women are more likely to store it in the hips and thighs before menopause. Men also tend to have narrower hips relative to the waist. As a result, the same waist-to-hip ratio carries a different risk signal depending on sex.
The 0.85 and 0.90 cutoffs are not claims that one body is healthier than another. They are calibration points derived from population data. Using one cutoff for everyone would misclassify a large number of people in one direction or the other.
After menopause, fat distribution often shifts toward the abdomen, and a woman's ratio may rise even if her weight is stable. That is one reason a ratio should be read alongside age and waist circumference rather than in isolation.
There is no separate WHO waist-to-hip ratio cutoff for each age group. The 0.85 and 0.90 thresholds apply across adulthood in the guidance most often cited. But age changes the context in three ways.
Some research uses age-specific percentiles to compare an individual with their peers. That can be useful clinically, but it is not the same as saying the healthy cutoff changes. If you want a peer comparison, ask a clinician; if you want a simple screening number, use the standard thresholds and track your own trend.
Ratio alone can hide an important fact: both the waist and the hip can be large, producing a ratio that looks acceptable while waist circumference is high. That is why guidelines also use waist circumference directly.
| Source | Women | Men | Meaning |
|---|---|---|---|
| WHO | ≥80 cm | ≥94 cm | Increased risk |
| WHO | ≥88 cm | ≥102 cm | Substantially increased risk |
| IDF (Europid) | ≥80 cm | ≥94 cm | Abdominal obesity criterion |
| IDF (South Asian, Chinese, Japanese) | ≥80 cm | ≥90 cm | Lower male cutoff |
These are waist circumference thresholds, not waist-to-hip ratio thresholds. They answer a related but different question: how much fat is around the abdomen in absolute terms. A person can have a “healthy” ratio and a waist circumference above the action level. In that case, the waist circumference is the more informative number.
It does not measure visceral fat directly. Waist circumference includes subcutaneous fat, muscle, bone and organs. Imaging is needed to quantify visceral fat. The ratio is a proxy.
It does not capture fitness. A person with a high ratio can have excellent cardiorespiratory fitness, and a person with a low ratio can be unfit. Fitness, blood pressure, glucose, lipids and smoking status all contribute to risk.
It does not account for hip bone width. Wide hips can lower the ratio without any difference in waist fat. Narrow hips can raise it. This is a particular issue when comparing people of different frames.
It is not stable across pregnancy or medical conditions. Pregnancy, fluid retention, large abdominal masses and some medications change the measurements. A ratio taken during those periods is not comparable to a baseline.
Measure at the same time of day, ideally in the morning before eating, with the same tape and the same landmarks. Waist at the narrowest point or the midpoint between the lowest rib and the hip bone; hip at the widest point of the seat. Breathe out normally; do not suck in.
Take two readings and average. Record the numbers, the date and any context — for example, “after four weeks of strength training” or “before breakfast”. A single ratio is a snapshot; a series is a trend. The measurement guide covers the landmarks in detail.
If you want to track more than the ratio, the body shape calculator also reports BMI, a healthy weight range, a Navy body fat estimate and your shape label from the same inputs. Each result includes its formula and its uncertainty, so you can see which numbers are estimates and which are direct arithmetic.
The ratio is a description of circumference, not a measurement of body composition. It does not tell you how much of your waist is visceral fat, how much is subcutaneous fat, or how much is muscle. A strength athlete with a thick torso and narrow hips can have a ratio above the threshold without excess visceral fat. A person with a normal ratio can still have metabolic risk from other factors.
It also does not capture height, which is why waist-to-height ratio is sometimes used as a complementary measure. A common screening rule is to keep waist circumference below half your height, although the evidence and the exact cutoff vary. The ratio and waist-to-height ratio can disagree; neither is a diagnosis.
Use the number as one input among several. Blood pressure, fasting glucose, lipids, smoking, physical activity, sleep and family history all carry information that a tape measure cannot.
Body fat distribution and cardiometabolic risk at a given waist circumference vary across populations. Some guidelines use lower waist thresholds for people of South Asian, Chinese, Japanese or other Asian descent, because the same waist circumference can correspond to a higher risk than in European populations.
The International Diabetes Federation, for example, uses a waist circumference of 90 cm for men of South Asian, Chinese or Japanese descent, compared with 94 cm for Europid men, while keeping 80 cm for women in both groups. Waist-to-hip ratio cutoffs are less consistently stratified, but the principle is the same: a single global chart is a rough approximation.
If you know that your population has a different risk profile, mention it to a clinician rather than trying to adjust the number yourself. The chart is a screening aid, not a personalized risk calculator.
Yes, the ratio can change, but not always in the way people expect. Losing overall body fat tends to reduce waist circumference, which lowers the ratio. Strength training can increase hip circumference by building glute and thigh muscle, which also lowers the ratio, even if waist fat is unchanged. Both are legitimate changes; the health meaning is different.
Visceral fat often responds to a calorie deficit and regular aerobic activity, and it can decrease relatively quickly at the start. Subcutaneous hip and thigh fat may be more resistant. You cannot spot-reduce the waist, and waist trainers do not produce lasting change.
A realistic plan is the usual one: a sustainable calorie deficit if weight loss is appropriate, strength training two or three times a week, aerobic activity, adequate protein and sleep. The ratio may move slowly. Track monthly, not daily. For the broader picture of what changes shape, see can you change your body shape.
Consider a conversation with a healthcare professional if your waist circumference is above the action level, your ratio is repeatedly above the sex-specific threshold, or you have other risk factors such as high blood pressure, high blood sugar, abnormal lipids, a family history of cardiovascular disease or type 2 diabetes. A ratio alone is not a reason to panic; a cluster of signals is a reason to get a proper assessment.
This guide is an editorial reference, not medical advice. It explains how the numbers are defined and what they are used for; it cannot tell you whether you personally have a health condition.
Below 0.85 is the WHO lower-risk threshold. Waist circumference also matters: 80 cm and 88 cm are commonly used action levels for increased and substantially increased risk, with variation by population.
Below 0.90 is the WHO lower-risk threshold. Waist circumference action levels are commonly 94 cm and 102 cm, with a lower male cutoff of 90 cm for some Asian populations.
The standard WHO cutoffs are not age-specific, but fat distribution and muscle mass change with age, so the ratio often rises. Age also raises baseline risk, so the same number carries more weight later in life.
This is an editorial reference, not medical advice. Body shape and body fat estimates describe proportions; they do not diagnose health.
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