Which of the following BEST describes Body Mass Index (BMI)?

Body Mass Index (BMI) is best described as a measure of body fat based on height and weight. This calculation provides a simple numeric value that allows individuals and healthcare providers to assess whether a person is underweight, normal weight, overweight, or obese based on standardized categories. The formula for calculating BMI is weight in kilograms divided by height in meters squared, which reflects how body weight correlates with height.

This method is particularly useful because it does not require specialized equipment and can be easily applied in various settings. While it has limitations—such as not distinguishing between fat and muscle mass or considering factors like age and sex—it serves as a quick screening tool for potential weight-related health issues.