About this waist-to-hip ratio calculator
Calculate your waist-to-hip ratio, a simple measurement the World Health Organization uses as an indicator of how body fat is distributed, which relates to health risk independently of overall weight. Enter your waist and hip measurements in centimeters to get the ratio and a general low, moderate, or high risk category based on WHO reference thresholds, which differ for men and women. Carrying more fat around the waist rather than the hips is associated with higher risk for the same overall body weight.
How it works
Waist-to-hip ratio is simply the waist measurement divided by the hip measurement. WHO reference thresholds classify men below 0.90 and women below 0.80 as low risk, men from 0.90 to 0.99 and women from 0.80 to 0.85 as moderate risk, and higher ratios as high risk.
Try these examples
Male: waist 80 cm, hip 100 cm
Ratio 0.80 · Low risk
Female: waist 90 cm, hip 100 cm
Ratio 0.90 · High risk
Limitations & privacy
This is a screening indicator, not a diagnosis. It does not account for muscle mass, frame size, ethnicity-specific thresholds, or other individual health factors. Measure both waist and hip at their widest natural points for consistent results.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
A few good questions
Where do I measure my hips?
Measure around the widest part of your hips and buttocks, keeping the tape level and snug but not compressing the skin.
Why do men and women have different thresholds?
WHO reference ranges account for typical differences in body fat distribution between sexes, so the same ratio can carry different risk implications.
Is this the same as BMI?
No. BMI reflects overall weight relative to height, while waist-to-hip ratio reflects where fat is distributed, and the two provide different, complementary information.
Updated September 19, 2026