Discussion in 'The Bike Cafe' started by Rocket_Man, Jul 28, 2006.

1. ### Rocket_Man New Member

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How do you find the grade of a hill?? I know there is a way to figure it out...but I forgot how. The hill in question is 3 miles, with a 800' elevation change. Any help would be great...thanks!!!

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2. ### Darkhorse85 New Member

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well, just make a triangle and do some geometry. Dont forget to convert all units to be the same type. Once you find the degree, you can convert that into a percentage of 360 er whatever for percent grade.

but this would just be the average grade over that 3 miles.

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...5%

4. ### Darkhorse85 New Member

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give a man a fish, he'll eat for a day
teach a man to fish...

5. ### Rocket_Man New Member

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Hmmm...ok...so...
5280' ~ mile
x 3 ~ miles
-----
15840' Total distance

Then you divide the elevation change by the distance??

800/15840 = .05 or 5%

Hmmm...seems correct!!! And yes...that would be the AVERAGE grade over those 3 miles...there are some parts where it is steeper/flatter.

THANKS!!!