The metric system is used by the vast majority of countries for health measurements, and most clinical BMI references use kilograms and meters. This calculator is preset to metric units so you can enter your weight in kilograms and your height in centimeters without toggling settings. It computes your BMI using the standard formula of weight divided by height squared and maps the result to WHO health categories immediately.
Calculator
Calculate your Body Mass Index and see exactly where you land on the healthy-weight scale.
Enter your height and weight
Your BMI and weight category will appear here instantly.
Body Mass Index (BMI) is calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). It provides a simple numeric measure of a person's thickness or thinness. While widely used by health organizations, BMI does not directly measure body fat percentage.