Body Mass Index (BMI) is a tool commonly used to assess general weight categories based on height and weight. Different ranges are used to classify whether a person may be underweight, within a typical range, or at a higher weight category. For example, BMI ranges like 10–15, 18.5–24.9, 25–30, and 30–40 are often referenced in health assessments to help screen for potential concerns. However, BMI does not account for muscle mass, bone structure, age, or sex, and should not be viewed as a comprehensive measure of health. Two individuals with the same BMI may have very different body compositions and fitness levels. While it’s a quick and accessible tool, BMI is best used as one part of a broader conversation about wellness, alongside lifestyle habits, medical history, and physical exams. Knowing how it’s calculated and interpreted helps you better understand health guidelines and limitations.