Overview
Waist-to-height ratio (WHtR) is a quick screen for central (abdominal) fat, which carries more health risk than fat elsewhere. It's often a better predictor of cardiometabolic risk than BMI and works across heights and sexes.
How it's calculated
Measure your waist at the navel, relaxed, and enter it with your height in the same units. The ratio falls into bands: below 0.4 low, 0.4–0.5 healthy, 0.5–0.6 increased risk, and 0.6 or above high risk.
WHtR = waist (cm) / height (cm)
How to read your result
The simple rule is 'keep your waist to less than half your height' — a ratio under 0.5. Rising WHtR signals accumulating abdominal fat even if your weight looks stable, making it a useful trend to track.
Frequently asked questions
Is WHtR better than BMI?
For health risk, often yes — it captures dangerous central fat that BMI misses, and the 0.5 threshold works across heights and both sexes.
Where do I measure my waist?
At the navel, standing relaxed after a normal exhale, with the tape level and snug but not compressing the skin.
What's a healthy ratio?
Below 0.5 is considered healthy for most adults. Climbing toward 0.6 and above signals rising central-fat risk.
Sources & references
- Ashwell M, Gunn P, Gibson S. Waist-to-height ratio as an indicator of early health risks: systematic review and meta-analysis. Obes Rev. 2012;13(3):275-286.
- Browning LM, Hsieh SD, Ashwell M. A systematic review of waist-to-height ratio as a screening tool: suggested boundary value of 0.5. Nutr Res Rev. 2010;23(2):247-269.
Medical disclaimer
This calculator is for general educational purposes only and is not medical advice. Estimates are based on population formulas and may not fit your individual situation. Consult a qualified healthcare or fitness professional before making health, nutrition or training decisions.