Waist-to-Height Ratio Calculator
The Waist-to-Height Ratio (WHtR) is a simple yet powerful screening tool that measures central adiposity — the accumulation of fat around the abdomen — by dividing waist circumference by height, both measured in the same unit. Because abdominal fat is more metabolically harmful than fat stored elsewhere, WHtR is considered a stronger predictor of cardiovascular disease, type 2 diabetes, and metabolic syndrome than BMI alone.
A healthy WHtR is generally below 0.5, meaning your waist should be less than half your height. Values between 0.5 and 0.6 indicate overweight, while 0.6 or above signals obesity and elevated cardiometabolic risk. The ratio is sex-neutral and applies across different ethnicities, making it a versatile complement to other body composition measures.
How it works
WHtR = Waist Circumference ÷ Height (both in the same unit, e.g. cm or inches). The result is a dimensionless ratio. Healthy range: WHtR < 0.5. Overweight: 0.5 ≤ WHtR < 0.6. Obese / High risk: WHtR ≥ 0.6.
Use cases
- Screening for abdominal obesity and elevated cardiometabolic risk
- Tracking changes in central fat distribution during a diet or exercise program
- Complementing BMI assessments in clinical or wellness settings
- Comparing health risk across different body types and ethnicities
- Setting waist circumference goals relative to your own height
Frequently asked questions
What is a healthy waist-to-height ratio?
A healthy WHtR is generally below 0.5, meaning your waist measures less than half your height. Values from 0.5 to under 0.6 indicate overweight, and 0.6 or above signals obesity and elevated cardiometabolic risk. The simple rule of thumb is to keep your waist under half your height.
How do I calculate my waist-to-height ratio?
Divide your waist circumference by your height, using the same unit for both. For example, a 80 cm waist and 175 cm height gives 80 ÷ 175 = 0.46. Because it is a ratio of two lengths, the result is the same whether you measure in centimeters or inches.
Is waist-to-height ratio better than BMI?
WHtR is often considered a stronger predictor of cardiovascular disease, type 2 diabetes, and metabolic syndrome than BMI because it captures central abdominal fat, which is more metabolically harmful. It also works well across sexes and ethnicities, but it is best used alongside BMI rather than as a complete replacement.
Where should I measure my waist for the ratio?
Measure your waist circumference at the midpoint between the bottom of your ribs and the top of your hip bones, usually near the navel, with the tape snug but not compressing the skin. Measure after breathing out normally and keep the tape level all the way around for a consistent reading.
Does waist-to-height ratio differ for men and women?
The 0.5 threshold is sex-neutral, so the same healthy cutoff applies to both men and women, which is one of the reasons WHtR is popular as a screening tool. Body-fat distribution does differ between sexes, but the ratio itself uses the same boundaries for everyone.