Originally Posted by
toucci
It's simple geometry really. I usually use the pythagorean theorem to calculate the slope, IE on a 1 mile , 500 foot climb
a^2+b^2=c^2
a^2+250000=27878400
a=5256
rise/run = b/a = 500/5256 = ~0.095 or 9.5% gradient
gradient is most definitely not calculated this way.