About this tool
Waist-to-hip ratio (WHR) divides waist circumference by hip circumference to describe how body fat is distributed rather than how much of it there is. The World Health Organization popularized WHR as a screening tool after large cohort studies — including the INTERHEART study across 52 countries — found that central (abdominal) fat distribution predicted cardiovascular events more strongly than BMI alone, even in people classified as a normal weight.
Because WHR needs only a tape measure, it's a quick, equipment-free complement to BMI or a full body-fat percentage estimate — but like any single-number screening ratio, it has limits: it doesn't account for muscle mass, bone structure, pregnancy, or age-related changes in fat distribution, and measurement technique (where exactly you place the tape, and whether you measure at rest after exhaling) can shift the result by a few points. Use it as one data point among several, not a stand-alone diagnosis.
Frequently asked questions
Is WHR better than BMI?
Not "better," just different — they measure different things. BMI relates weight to height and says nothing about where fat is distributed on the body. WHR specifically captures fat distribution (central/abdominal vs. hip/thigh), which some research suggests correlates independently with cardiovascular risk beyond what BMI alone captures. Many health professionals view them as complementary metrics to consider together, not as competitors where one replaces the other.
Should I measure at the narrowest or widest point of my waist?
The most commonly recommended technique for waist measurement (used in the studies this classification is based on) is at the midpoint between the bottom of your ribcage and the top of your hip bone, roughly at or just above your navel — not necessarily the visually "narrowest" or "widest" point, which can vary by body shape. For hip measurement, measure around the widest point of your hips/buttocks. Measure directly against skin (not over thick clothing), standing relaxed with the tape snug but not compressing the skin, at the end of a normal exhale for consistency.