About the BMI Calculator

Note: The BMI ranges used in this calculator derive from the BMI guidelines of the National Heart, Lung and Blood Institute (NHLBI), in cooperation with the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), of the National Institutes of Health, as published in Clinical Guidelines on the Identification, Evaluation and Treatment of Overweight and Obesity in Adults, 1998.

Entering Your Information: The Body Mass Index Calculator can be used as a general gauge of how appropriate your body weight is for your height. By entering your current height and weight, you can assess if you are underweight, overweight or just right.

The BMI Calculator is based on data taken from middle-aged man and women. It may not be accurate for pregnant or nursing women, competitive athletes, and the elderly. The normal ranges for BMI in children are entirely different, and vary according to age and gender.

If you have used other A.D.A.M. tools, some of this information may be filled in for you.