A:hey there BMI stands for Body Mass Index. BMI is a persons hieght to wieght ratio which determines if he/she is underwieght/overwieght or obese etc. The following link is an online BMI calcultor. there are many more fun features as well that you may find useful. http://www.timeswellness.com/index.aspx?page=article§id=16&contentid=2007062421524729663d2c011§xslt=SecAllImg
good luck.
