A normal or healthy BMI for adults is between 18.5 and 24.9 kg/m2. Learn how to calculate your BMI below. Your height and weight are used to calculate your body mass index (BMI), which is a quick and easy way for most people to assess their body composition and ideal weight for their height. Maintaining a BMI in the Healthy Weight range is one way to support overall health as you age. Discuss your BMI with your healthcare provider as BMI may relate to your overall health and well-being. For more information about lifestyle approaches, visit Healthy Weight and Growth. BMI is a screening measure and is not intended to diagnose disease or illness. The updated guidelines establish BMI over 23 kg/m² as a new threshold for obesity. Waist Circumference and Waist-to-Height Ratio are now also considered important measures. The BMI calculator is a useful tool that measures whether you are overweight, underweight, or just right. Your weight alone is not enough to tell, as a tall, skinny man may easily weigh more than a short but rotund woman. The body mass index, or BMI, overcomes this problem by finding a ratio of your weight to your height and returning a single number. This number will fit into a category on the scale of BMI ranges, which are defined as underweight, normal, overweight, and obese. To work out ...
