Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio — a simple central-obesity screen.
Results update as you type.
About this calculator
A waist-to-height ratio (WHtR) calculator divides your waist circumference by your height. The simple public-health rule is to "keep your waist to less than half your height", so a ratio under 0.5 is the healthy target for most adults. Research suggests WHtR predicts cardiometabolic risk at least as well as BMI while being easy to measure.
Frequently asked questions
What is a healthy waist-to-height ratio?
Below 0.5 is the widely-used healthy cut-off — your waist should be less than half your height. Ratios of 0.5–0.6 suggest increased risk and above 0.6 high risk.
How does WHtR compare to BMI?
WHtR directly measures central fat, which is the more dangerous kind, and applies the same 0.5 threshold across ages and sexes. Several studies find it predicts heart and metabolic risk as well as, or better than, BMI.
Results are estimates for general guidance only, not financial, medical or tax advice.