My post college weight was about 185 lbs which was about 20 lbs more than when I left high school without increasing my waist size of 34", but the increase was due to growing (vertically) and the Army. Today I'm hovering around 205 lbs and my waist is 36" and according to the BMI calculator used by the Army, I'm around 21%. The charts that have been posted are great starting points, but you really have to use other means to determine your BMI. Here is a link to the calculator that we use and I consider it to be accurate, without getting into more complicated (or costly) means of determining your BMI.
Army Body Fat Calculator