BMI stands for
Body
Mass
Index. BMI is a ratio between you height in Meters and your weight in kilograms.
The BMI Formula: Weight in Kilograms / (Height in Meters)^2
According to the Centers of Disease Control a "good" BMI is withing the range: 18.50 - 24.99. Overweight is between 25.00 - 29.99, and Obese applies to all people with BMI's 30, and higher. (My BMI was 45.89 when I started my weight loss!)
If you do not know your weight and height in the metric system,
Aaron Scott (who is the sexiest sweetheart in the whole world!) wrote a JAVA applet to automatically calculate BMI (and BMR).
You can find it here.
