Body Mass Index Calculator at the Center for Disease Control

One of the interesting statistics you can use to manage your weight is something called Body Mass Index. While calculating this number precisely involves knowing things like your bone density, you can get a reasonable approximation of BMI using just your height and weight. Doctors define a BMI of over 25 as overweight and over 30 as obese, and both of these categories correlate with increased risk of certain health problems and diseases. You can check out your own BMI at the Center for Disease Control's BMI calculator page:
http://www.cdc.gov/nccdphp/dnpa/bmi/