You select your gender and measurement unit, then enter your waist circumference (measured at the narrowest point, typically at the navel) and hip circumference (measured at the widest point of the buttocks). The tool divides waist by hip to produce the ratio, then compares it against WHO health risk thresholds that differ for men and women. The unit of measurement (inches or centimeters) does not affect the ratio since both measurements use the same unit.
Measure at the narrowest point of your torso, usually just above the belly button. Stand relaxed, breathe out normally, and wrap the tape snugly without compressing the skin. The WHO recommends the midpoint between the lowest rib and the top of the hip bone.
WHR and BMI measure different things. BMI estimates overall body mass relative to height; WHR focuses on where fat is stored. Abdominal fat (apple shape) carries more health risk than hip/thigh fat (pear shape). Many health professionals recommend using both metrics together.
Men and women naturally store fat in different patterns. Women typically carry more hip and thigh fat, so their "healthy" ratio is lower. The WHO thresholds reflect these biological differences in fat distribution and associated cardiovascular risk.
Yes. Diet, exercise, and aging all affect fat distribution. Cardiovascular exercise and strength training can reduce abdominal fat and improve your ratio. However, genetics also play a significant role in where your body tends to store fat.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.