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Switch between “Metric” and “Imperial”; enter cm/kg or ft+in/lbs.

Fill in both values and the result updates live.

The top shows the BMI value and category, with a colored scale and guidance below.

BMI is only a rough reference; consult a professional for medical advice.

BMI = weight(kg) ÷ height(m)², shown to one decimal place.

For general adults: below 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese.

BMI is a population-level rough indicator and doesn’t reflect body fat; use specialized measures for special groups.