An important thing to keep in mind is that ideal body weight hharts are different for men and women.  Since males and females have different body types, it is very important that you use the correct weight chart for your gender.  If you do not use the right weight chart, the numbers that you are presented with will not be accurate.  This can be a bad thing, since if you have the wrong ideal body weight it will be impossible to establish realistic goals.  To get a weight chart for your gender, checkout weightcharts.net or ask your doctor who should have free copies for you.