Use this calculator to determine your body-mass index―a ratio of height to weight that may indicate if your heart is at risk.

By Real Simple
Updated December 02, 2004
Advertisement
Lucy Vigrass

Rather than getting stuck on a number on your bathroom scale, pay attention to body mass index (BMI). It’s a ratio of height to weight that indicates if your weight puts your health at risk. To find your BMI, use this formula: Your weight (in pounds), divided by your height in inches squared, multiplied by 703. Or use the on-line BMI calculator below, courtesy of the National Heart, Lung, and Blood Institute: nhlbi.nih.gov.