Simple Tools to Figure Out My Yard Slope Slope Determination. 360 degrees represents a full range of motion which is why you are applying the percentage to this number. Repeat this process on all sides of your home and any place the grade changes such as terraces or driveways.
Convert the rise and run to the same units and then divide the rise by the run.
Place a stake in the ground at the highest point on the slope you wish to calculate. If you want to make things really easy when getting the proper pitch get yourself a digital level like this one. Use a line level which is two poles of the exact same height 50 inches would be good with string running. There are three steps in calculating the slope of a straight line when you are not given its equation.