Calculate your waist-to-height ratio (WHtR), a simple screening measure often summarized as 'keep your waist to less than half your height'.
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Waist-to-height ratio (WHtR) is your waist circumference divided by your height, in the same units. It's often summarized with the simple rule of thumb 'keep your waist circumference to less than half your height', equivalent to a ratio below 0.5. This calculator uses commonly cited bands: below 0.40 suggests possible underweight, 0.40 to 0.49 is generally considered healthy, 0.50 to 0.59 indicates increased risk, and 0.60 or above indicates high risk.
Because WHtR directly reflects abdominal fat relative to body size, some studies suggest it may be a better predictor of cardiovascular and metabolic risk than BMI, and it applies a single simple threshold (0.5) reasonably consistently across different heights, unlike BMI, which uses more complex category boundaries.
The commonly cited guidance is to stay below 0.5 (waist less than half your height) as a general target for reduced health risk, though this is a population-level guideline, not a precise medical threshold for any one individual.
Waist-to-height ratio compares your waist to your height, while waist-to-hip ratio compares your waist to your hip circumference. Both screen for abdominal-fat-related health risk, but use different reference measurements and different risk bands.
No, this is a general screening tool. Speak with a healthcare professional for a full assessment of your individual health risk, especially if you have other risk factors or existing health conditions.
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