This waist-to-height ratio calculator compares your waist circumference with your height and shows your WHtR score, category, half-height waist target, and a sex-specific waist circumference check. The main waist-to-height ratio categories follow NICE guidance for identifying central adiposity, while the sex-specific waist check uses common adult waist circumference cutoffs of 88 cm / 35 in for women and 102 cm / 40 in for men.
What this calculator does
Enter your waist and height, choose your measurement system, and select woman or man for the waist circumference cutoff. The calculator will show your waist-to-height ratio and explain what the number means in plain language.
- Waist-to-height ratio: waist circumference divided by height
- WHtR category: healthy, increased, or high central adiposity range
- Sex-specific waist check: compares your waist to the selected adult cutoff
- Half-height target: shows the waist size equal to 50% of your height
- Copy results: copies the meaningful result summary with the page URL
How to measure your waist
Use a flexible tape measure. Measure around your waist at about belly button level, while standing relaxed. Keep the tape level, snug, and not pulled tight. For the most consistent result, measure after breathing out normally.
How to use the calculator
- Select Woman or Man for the waist circumference cutoff.
- Choose Metric or Imperial.
- Enter your waist and height.
- Click Calculate.
- Read your ratio, category, waist cutoff check, and half-height target.
What your waist-to-height ratio means
A waist-to-height ratio below 0.50 means your waist is less than half your height. A result from 0.50 to 0.59 suggests increased central adiposity, and 0.60 or higher suggests high central adiposity. A lower number is generally better, but this tool should be used as a screening guide, not as a diagnosis.
Waist-to-height ratio focuses on central body fat, which BMI alone may miss. Two people can have the same BMI but very different waist measurements. Because this calculator compares waist directly with height, it can be a practical way to check whether waist size is proportionate to body size.
This calculator is for adults and gives a general screening estimate. Body composition, age, ethnicity, pregnancy, athletic build, medical conditions, and personal health history can affect interpretation. For medical decisions, use this result together with professional health advice.
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