Body mass index (BMI) is a measure of body fat based on height and weight. It is used to screen for weight-related health problems such as obesity, underweight, and eating disorders. BMI is calculated by dividing weight in kilograms (kg) by the square of height in meters (m).
BMI is a useful tool for public health and clinical practice because it is simple to calculate and can be used to track changes in weight over time. BMI can also be used to identify individuals who are at risk for weight-related health problems and to develop interventions to prevent or treat these problems.