Originally Posted by jetjockee

Try this-

Ft per NM divided by 6000 times 100, this will give you the Climb Gradient..

500
----- X 100 = .0833333 X 100 = 8.33% Climb Gradient
6000

500' = Ft per NM

6000' = How many feet in a NM ( I believe its 6032' per NM, I just round it off )