Body Mass Index (BMI) is a measure of body fat based on height and weight. It is calculated as weight in kilograms divided by the square of height in meters. BMI is used to screen for weight-related health problems such as obesity and malnutrition.
BMI is a useful tool for assessing weight status, but it is important to note that it is not a perfect measure. BMI does not take into account muscle mass or body composition, so it may not be accurate for everyone. For example, a person who is very muscular may have a high BMI even if they are not overweight.