Waist-to-Height Ratio Calculator

For most adults a ratio below 0.5 is considered healthy. The plain rule is to keep your waist circumference under half of your height, which is the boundary this tool uses to draw the healthy waist limit.

The tool labels a ratio below 0.4 as Underweight (low), 0.4 up to 0.5 as Healthy, 0.5 up to 0.6 as Increased risk, and 0.6 or above as High risk. These bands are a screening guide, not a diagnosis.

BMI cannot separate muscle from fat or show where fat sits. Waist-to-height ratio focuses on abdominal fat, which sits around the organs and is more closely tied to heart and metabolic risk than overall weight.

Wrap the tape around your bare middle, roughly level with or just above the navel, at the point where your torso is narrowest. Stand relaxed, breathe out normally, and keep the tape horizontal and snug without digging in.

No. Because the ratio divides waist by height, it is unit-independent, so 80 cm over 180 cm and 32 in over 72 in give the same figure. Switching the Unit menu converts both fields together so the physical body stays the same.

The ratio is rounded to three decimals and the healthy waist limit to two. A tape measure is usually accurate to about half a centimeter, so treat the last digit as an estimate rather than an exact value.

The 0.5 threshold is meant for non-pregnant adults. Children use age-specific charts, and waist measurements are not meaningful during pregnancy. This calculator is not designed for those cases.

Yes. The calculation runs entirely in your browser and nothing is sent to a server, so your waist, height, and result never leave your device.

No. Waist-to-height ratio is a screening number, not a diagnosis, and it does not account for your full health picture. Discuss your result and any concerns with a qualified healthcare professional.