Body Mass Index (BMI) is a numerical value calculated from a person’s weight and height. It is a simple yet valuable tool for quickly assessing whether an individual’s weight falls within a healthy range for their height. BMI is used to categorize people into different weight categories, such as underweight, normal weight, overweight, and obese. While BMI is not a perfect measure of body fat, it is widely used in healthcare settings to identify individuals who may be at risk for weight-related health issues.