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Exactly how much does a 2% percent grade go up by in a certain distance? Or in other words, how many feet does a 2% grade go up by per mile?
5280 ft x .02 = 105.6ft
2% is 2/100. So a 2% grade goes up 2 units in 100 units. 2" in 100", 2 ft in 100 ft, 105.6 ft in 5280 ft.
5280' = I mile, so a 1% grade would go up 52.8' per mile. Multiply that 52.8' by 2 for a 2% grade, by 3 for a 3% grade etc.