How do you calculate %gradient of a hill?

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08-20-11 | 08:00 PM

#51

oilman_15106

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Answer to the OP's question: Google "gradient calculator"

08-20-11 | 10:37 PM

#52

gregf83

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Joined: Jun 2008

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From: Vancouver, BC

Quote:

Originally Posted by Wogster

It's useless unless your trying to compute the %grade on a hill, think about it this way, you really don't care if point A and point B are 400m apart, if your 40m higher up you want the running distance, 401.996m because that is how far the wheels have turned.

A <.5% error when you're going up a 10% hill is hardly useless. For all practical purposes the horizontal distance works just fine.

08-20-11 | 10:56 PM

#53

Robert Foster

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Joined: May 2008

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From: Southern california

Bikes: Lapierre CF Sensium 400. Jamis Ventura Sport. Trek 800. Giant Cypress.

Quote:

Originally Posted by TheHen

Fixed it to reflect my own problems.

All this talk of slopes, triangles and such has me yearning for some pi(e).

Yes that would work as well.

About 2 years ago and 60 extra pounds I thought every hill was at least an 8 percent grade. I would punch the bike computer into alt mode and then go for grade and discover it was a 4 to 5 percent grade. I thought the computer was less than honest.