Waist-to-Height Ratio Calculator
Your waist-to-height ratio (WHtR) compares waist size to height and predicts cardiometabolic risk better than BMI for many people. The simple rule: keep your waist under half your height.
How to find your waist-to-height ratio
- Measure your waist at the navel and your height in the same unit.
- Enter both values and pick cm or inches.
- Read your ratio, category, and the healthy waist limit for your height.
Examples
Healthy ratio
Waist 80 cm, height 180 cm
Ratio 0.444 (Healthy), healthy waist up to 90 cm
Increased risk
Waist 100 cm, height 180 cm
Ratio 0.556 (Increased risk)
Frequently asked questions
What is a healthy waist-to-height ratio?
A ratio below 0.5 is considered healthy for most adults. The simple guideline is to keep your waist circumference under half of your height.
Why use waist-to-height ratio instead of BMI?
BMI cannot tell muscle from fat or where fat sits. Waist-to-height ratio captures abdominal fat, which is more closely tied to heart and metabolic risk.
Where do I measure my waist?
Measure around the narrowest part of your torso, usually just above the navel, with the tape snug but not compressing the skin, after a normal breath out.
Does the unit matter?
No. Because the ratio divides waist by height, any consistent unit works. Just be sure both measurements use the same unit, either cm or inches.
Is this a medical diagnosis?
No. Waist-to-height ratio is a screening guide, not a diagnosis. Discuss your results and any concerns with a qualified healthcare professional.
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