BMI calculator
Calculate BMI (body mass index) using the WHO formula. Check whether you are underweight, normal, overweight or obese. Free BMI calculator.
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Calculator · Health
WHtR Calculator (Waist-to-Height Ratio)
Enter your waist circumference and height — the calculator returns WHtR and cardiovascular risk category.
How we calculate WHtR
WHtR = waist circumference (cm) / height (cm). Values below 0.5 are generally optimal. Above 0.55 indicates elevated risk.
Example: waist 80 cm, height 170 cm
WHtR = 80/170 = 0.47 — optimal category.
Frequently asked questions
What is WHtR?
Waist-to-Height Ratio — waist circumference divided by height. It predicts cardiometabolic risk better than BMI alone.
What is a healthy WHtR?
Below 0.5 is considered optimal for most adults. The simple rule: "keep your waist less than half your height".
How do I measure my waist correctly?
Measure at the narrowest point between your lower ribs and hip bone, or at navel level. Stand relaxed, breathe normally.
How does WHtR differ from BMI?
BMI uses weight and height; WHtR uses waist and height. WHtR better captures central obesity and visceral fat risk.
Is WHtR the same for men and women?
The formula is the same, but some studies suggest slightly different thresholds. Values above 0.5 are concerning for both.
What does WHtR above 0.6 indicate?
Very high cardiovascular risk. Abdominal obesity at this level is associated with diabetes, hypertension and metabolic syndrome.
Can children use this calculator?
WHtR thresholds differ for children. This calculator is designed for adults.
Does ethnicity affect WHtR interpretation?
Yes — some Asian populations have higher health risk at lower WHtR values. Consult country-specific guidelines.
Can I improve my WHtR?
Yes — regular aerobic exercise and a balanced diet help reduce waist circumference over time.
Is WHtR better than waist circumference alone?
Yes — it normalises for height, making it comparable across individuals of different statures.
Indicative result
For informational purposes only. Consult a physician for medical advice.
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