What this calculator tells you
Waist-to-height ratio adds information about central fat distribution that BMI cannot provide. The memorable adult screening message is to keep waist circumference below half of height.
How to use the Waist-to-Height Ratio Calculator
- 1
Measure height and waist in the same unit.
- 2
Take the waist measurement midway between the lowest rib and top of the hip after a normal exhale.
- 3
Use the ratio together with other health information.
Formula and interpretation
Method
Waist-to-height ratio = waist circumference ÷ height, measured in the same unit.
How to read the result
For adults, a ratio below 0.5 is generally the lower-risk screening range; 0.5–0.59 indicates increased central adiposity and 0.6 or more indicates a further increase.
Important limitations
This is a screening measure, not a diagnosis. It does not replace clinical risk assessment, and measurement technique matters.
Waist-to-Height Ratio Calculator questions
Does the unit matter?
No, provided waist and height use the same unit.
Is this more useful than BMI for muscular people?
It can add useful context because it focuses on central adiposity rather than total weight, but it is still only a screening tool.
