Percent Grade
Someone asked me how to compute the grade of a climb. Here's a quick and fairly accurate way. Divide the elevation gain ("rise") in feet by the length ("run") of the climb in miles. Then divide the result by 50 (52.8 = 1% of a mile). So 2500 feet of rise divided by 5 miles of run is 500. 500 divided by 50 is 10. So a 10% grade.
posted by Joe Friel @ 11:54 AM
3 Comments
3 Comments:
that's interesting. are you sure that you divide feet by miles and not feet by feet or miles by miles?
Well, you're actually dividing feet by feet since the 50 is just a quick way of getting at it instead of using 52.8 feet (1% of a mile).
got it and makes sense. work smarter and not harder!
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