Body Mass Index (BMI) is a numerical value calculated from a person's weight and height. It is a commonly used tool to estimate whether an individual has a healthy body weight in relation to their height. BMI is a simple and widely accepted method for classifying individuals into different weight categories, which can be helpful in assessing health risks associated with body weight.

Body Mass Index (BMI) is a person's weight in kilograms (or pounds) divided by the square of height in meters (or feet). A high BMI can indicate high body fatness.