Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio and assess health risks. A useful indicator of body fat distribution.

This calculator divides your waist circumference by your hip circumference and bands the result into a health-risk category. The ratio itself is pure arithmetic — Gender plays no role in computing it — but the risk thresholds behind the label are sex-specific: for men the moderate band starts at 0.90 and high risk at 0.95, while for women those lines sit lower at 0.80 and 0.85, reflecting different baseline fat distribution. Because the output is a division, the two measurements pull in opposite directions — adding a centimeter to your waist raises the ratio while adding one to your hips lowers it — and near the default measurements they matter almost exactly equally, since an 8 cm waist change and a 9.5 cm hip change each swing the ratio by about 0.08. The banding is a step function: sitting at 0.89 versus 0.90 produces nearly the same number but a different label, so treat results near a threshold as borderline rather than categorically different. The ratio captures fat distribution, not fat amount — two people with identical waist-to-hip ratios can carry very different total fat, which is why this pairs poorly with no other measure. Measurement technique (relaxed abdomen, widest hip point) moves the result more than most users expect, and the tool does not account for it.