This calculator will calculate the height difference in inches based on the required slope percentage and the length of the area that requires the slope.
24'-6" = 100% To make it easier and more useful, convert the foot value into inches 24 * 12 = 288 + 6 = 294" 294 = 100%Divide this amount by one hundred and multiply it by two to get the 2 percent value;
294 ÷ 100 = 2.94 * 2 = 5.88"The garage floor needs a height difference of 5.88 inches to get the required 2% slope. (the back of the garage floor has to be 5.88 inches higher than the front)