Don't feel too bad if you get overweight... that is incredibly inaccurate. I know this b/c I've done a lot of BMI tests. There's no way to tell someone's BMI by their height and weight alone.
What about those who weight 200lbs and are pure muscle? what about those who weight 200 lbs and can't lift a 10 lb dumbell?

Real meathods:
water dunk test -100% accurate
Body caliper test - ~97% accurate
tape measure around belly/neck look @ chart meathod. - 95% accurate

type height and weight into a program - not accurate