One of the most potent risk factors for heart disease is overweight and obesity. According to the National Health and Nutrition Examination Surveys, approximately 66% of adults are overweight or obese. Body mass index (BMI) is a reliable indicator of your weight status. It assesses your weight relative to your height and provides a good indication of whether or not you are at heightened risk for disease from having excess fat. All you need in order to assess your BMI is your height and weight. Select your weight and height in the boxes below to determine BMI.