simple way to calculate climb gradient?

[novicef]

Old Smokey.

In your calculation where did you get the .3048 from?

For your example of a 500 foot obstacle at 5000 M, the obstacle-clear gradient is 500 / (5000 / .3048) X 100 = 3.05%

I am just doing my ATPL's so its nice to know this stuff.