Waist-to-Hip Ratio Calculator
Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.
Last updated: May 2026
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About this calculator
Waist-to-hip ratio (WHR) is simply waist circumference divided by hip circumference, and it captures something BMI misses: where your body stores fat. Two people can share an identical BMI yet have very different health risks depending on whether their fat sits around the abdomen or on the hips and thighs. Abdominal (visceral) fat is metabolically active and strongly linked to type 2 diabetes, high blood pressure, and cardiovascular disease, whereas lower-body fat is comparatively benign. The World Health Organization defines elevated risk at a WHR above 0.90 for men and above 0.85 for women; ratios at or below those thresholds are considered lower risk. To measure correctly, find the waist at the midpoint between the lowest rib and the top of the hip bone (roughly the narrowest part of the torso), and measure the hips at the widest point of the buttocks, keeping the tape horizontal and snug but not compressing the skin. Breathe out normally and do not suck in. Because both numbers are circumferences in the same unit, the ratio is unitless and the choice of centimetres or inches does not matter as long as both use the same unit. WHR is cheap, needs only a tape measure, and tracks visceral fat better than BMI, but it does not measure total body fat and can be distorted by very muscular glutes or by measuring at inconsistent landmarks.
How to use
Example 1 — Lower-risk woman. A woman measures a waist of 80 cm and hips of 100 cm. Enter 80 and 100. Result: 0.80. Verify: 80 ÷ 100 = 0.80. ✓ Because 0.80 is at or below the 0.85 female threshold, this is in the lower-risk band. Example 2 — Elevated-risk man. A man measures a waist of 102 cm and hips of 98 cm. Enter 102 and 98. Result: 1.04. Verify: 102 ÷ 98 ≈ 1.0408, rounded to 1.04. ✓ This is well above the 0.90 male threshold and signals elevated abdominal-fat risk worth discussing with a clinician.
Frequently asked questions
What is a healthy waist-to-hip ratio?
The WHO considers a WHR of 0.90 or lower healthy for men and 0.85 or lower healthy for women. Ratios above those cutoffs indicate abdominal obesity and a higher risk of heart disease, stroke, and type 2 diabetes. The thresholds differ by sex because women naturally carry more fat on the hips and thighs. These are population-level risk markers, not diagnoses — a single number slightly over the line is a prompt to look at the whole picture (blood pressure, blood sugar, activity), not a verdict. Tracking your own ratio over time is more informative than a one-off reading.
Where exactly should I place the tape measure?
Measure the waist at the midpoint between the bottom of your lowest rib and the top of your hip bone — for most people this is near the navel or the narrowest part of the torso. Measure the hips at the widest part of the buttocks. Keep the tape horizontal all the way around, snug against the skin without digging in, and take the reading after a normal exhale. Stand with feet together and weight evenly distributed. Consistent landmarks matter enormously: measuring the waist a few centimetres higher or lower can change the ratio enough to move you between risk categories.
Is waist-to-hip ratio better than BMI?
They measure different things and work best together. BMI estimates overall weight-for-height but cannot tell muscle from fat or say where fat is stored. WHR specifically flags abdominal fat, which is the most dangerous depot, and several large studies have found it predicts cardiovascular events at least as well as BMI. However, WHR says nothing about total body fat and can be misleading for very muscular or very lean people. Many clinicians now also use waist-to-height ratio, which only needs the waist measurement and a simple "keep your waist under half your height" rule. Use WHR alongside BMI and waist circumference rather than instead of them.
What are common mistakes when calculating WHR?
The biggest mistake is inconsistent tape placement — measuring the waist at the navel one time and at the narrowest point another time produces ratios that are not comparable. A second mistake is pulling the tape too tight or sucking in the stomach, both of which artificially lower the waist reading. People also mix units, measuring waist in inches and hips in centimetres, which makes the ratio meaningless (both must use the same unit). Finally, some measure over thick clothing, which inflates both numbers unpredictably. Measure against skin or a thin layer, exhale normally, and use the same landmarks every time.
When should I not use waist-to-hip ratio?
WHR is unreliable during pregnancy, when abdominal circumference reflects the pregnancy rather than fat distribution. It is also a poor measure for bodybuilders or athletes with very developed glute muscles, which enlarge the hip measurement and artificially lower the ratio. People with significant abdominal bloating from digestive conditions, ascites, or hernias will get distorted readings. Children should not be assessed with adult WHR thresholds. In all these cases, and whenever you have known cardiovascular or metabolic disease, a clinician should interpret body-composition measures in context rather than relying on a single ratio.