Your body mass index (often called your BMI) can give a good indication of your general health. It takes several factors unique to you, including your age, gender, height, and weight, and calculates a score. This score is in a range that indicates whether you’re underweight, a healthy weight, or overweight. Learn more and see your own BMI using our calculator. You’ll get tailored information and advice based on your score. While BMI is a useful tool, it doesn’t account for factors like muscle mass, and should be used in conjunction with other health metrics.