A simple ratio between two body measurements, computed directly.
How it works
Dividing the waist measurement by the hip measurement gives the ratio. Both measurements must use the same unit.
What this does not include
This does not include a health-risk classification for the ratio — published clinical thresholds for waist-to-hip ratio could not be independently verified against a primary source for this calculator, so it reports the number only, not a risk category.
How to use this calculator
- Enter your waist and hip measurements in the same unit.
A worked example
A 32-inch waist and 40-inch hip: ratio = 32 ÷ 40 = 0.8.
A 90 cm waist and 100 cm hip: ratio = 0.9.
What the variables mean
| Variable | Meaning |
|---|---|
| Waist | Waist circumference |
| Hip | Hip circumference at the widest point |
Edge cases worth knowing
Both measurements must use the same unit — mixing inches and centimeters produces a meaningless ratio, even though the math itself runs without error.
A hip measurement of zero makes the ratio undefined — there’s nothing to divide the waist measurement by, so the calculator declines to show a result.
Frequently asked questions
Why doesn’t this calculator say whether my ratio is healthy?
Because a specific numeric health threshold needs a directly verified source, and one could not be confirmed for this build — the ratio is reported plainly rather than paired with an unverified claim.
Does the unit of measurement matter?
Only that both measurements use the same unit — the ratio itself is unitless, so inches, centimeters, or any other consistent unit works identically.
Where should I measure my waist and hips?
Common practice measures the waist at its narrowest point and the hips at their widest point, though exact technique can vary by source.
