To learn more about BMI for adults, visit the Centers for Disease Control Body Mass Index section.

To learn more about BMI for kids and teens, visit the Centers for Disease Control BMI for Children and Teens pages.

Please note: BMI is not a fool-proof method for evaluating weight. Some people who are "underweight" are healthy. Some with a "normal" BMI have a lot of body fat. Some who are classified as "overweight" by this method have a lot of muscle and little fat. Some other people who are classified as "overweight" by this method are actually at a healthy weight for them and do not need to lose weight. Please discuss your BMI weight category with your health care provider to decide whether weight gain or loss is right for you and if so, how to improve your exercise and eating patterns for better health.