BMI Calculator
Enter your weight and height to calculate your BMI and see the matching classification, right in your browser.
Classification: Normal weight
Formula used: BMI = weight (kg) ÷ height (m)²
Reference ranges (WHO)
- UnderweightBelow 18.5
- Normal weight18.5 – 24.9
- Overweight25.0 – 29.9
- Obesity class I30.0 – 34.9
- Obesity class II35.0 – 39.9
- Obesity class III40.0 or above
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How it works
BMI (Body Mass Index) is calculated by dividing weight in kilograms by height in meters squared: BMI = weight ÷ height². It's a simple indicator used for population-level screening, but it doesn't distinguish muscle mass from body fat and doesn't account for factors like age, sex, or body composition — so it isn't a substitute for an individual medical assessment.