Calculate your Body Mass Index (BMI) and get insights about your health category. Track your progress over time with our calculation history.
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in metres squared.
BMI is a useful measure of overweight and obesity. It is calculated the same way for both adults and children. However, it is interpreted differently for children.