The Body Mass Index (BMI) is a calculation, based on your height and weight, which indicates rather reliably how overweight you are. BMI applies equally to both men and women. To use this calculator, just enter your height and weight, then click the “Calculate BMI” button.

     
Source: U.S. government guidelines. Accurate classification for most people. Not accurate for minors, elderly/frail, pregnant women, or highly muscular people.