What is a good WHtR?
Many guides suggest staying below 0.5—waist less than half your height.
Waist-to-Height Ratio Calculator
Divide waist circumference by height to get WHtR—a simple check for central adiposity that works in metric or US units.
Waist and height
Enter waist and height using the same unit system.
About this calculator
How to use Waist-to-Height Ratio Calculator, plus the formulas and logic behind the results.
Tool description
Waist-to-height ratio (WHtR) is waist divided by height. A common rule of thumb is keeping waist below half your height.
How to use
- Pick metric or US units.
- Measure waist and height carefully.
- Enter both values and calculate.
- Read the WHtR band shown in results.
Formulas & reference
WHtR = waist ÷ heightKeep waist below 0.5 × height (rule of thumb)Bands: <0.4 low, 0.4–0.5 healthy, 0.5–0.6 overweight, >0.6 higher risk
WHtR bands used here
- Below 0.4: low
- 0.4 to 0.5: healthy
- 0.5 to 0.6: overweight
- Above 0.6: higher risk
Calculation logic
Measurements normalize to centimeters, WHtR is calculated, then mapped to the band thresholds listed in the tool description.
WHtR is a screening metric. It does not replace blood work or clinical assessment.
Waist-to-Height Ratio Calculator FAQ
Common questions about this calculator and how to use the results.
Does this work for children?
This tool uses adult-style bands. Pediatric charts differ.
Metric or inches?
Either works if waist and height use the same system. The ratio is unitless.
Will ab workouts lower WHtR?
They can help, but waist size also reflects diet and overall fat loss.
Is WHtR sex-specific?
The ratio itself is not adjusted by sex here; interpretation may still differ individually.
How often should I check?
Monthly is enough for most people tracking lifestyle changes.