What does BMI stand for and what does it measure?

BMI stands for Body Mass Index, and it is a widely used tool that estimates body fat based on an individual's height and weight. The calculation involves dividing a person's weight in kilograms by the square of their height in meters. This metric helps categorize individuals into different weight categories, such as underweight, normal weight, overweight, and obese.

Understanding BMI is important for assessing potential health risks associated with body weight. While it does not directly measure body fat or account for factors like muscle mass, age, or sex, it serves as a useful screening tool to identify potential weight-related health issues. This is why the definition provided in the correct answer clearly and accurately encompasses both what BMI stands for and what it measures.