BMI Calculator
Body Mass Index estimates whether your weight is healthy for your height. It's a screening tool, not a diagnosis.
How to calculate your BMI
Enter your height in centimetres and weight in kilograms, and this free BMI calculator instantly works out your Body Mass Index and which category it falls into — underweight, normal, overweight or obese. BMI is a quick screening number based on a simple height-to-weight ratio, not a full health assessment, so treat the result as a starting point rather than a diagnosis. For a personal health reading, it's worth checking the number with a doctor.