How to Calculate the Percent of Pitch on Concrete Slopes Step 1. To find the corresponding angle in degrees convert the percentage to a decimal fraction and look up the angle in a tangent table or use a calculator. Insert a tent pin firmly into the ground.
It can be measured as an angle in degrees radians or gradians or as a percentage the width-to-height ratio multiplied by 100.
For example if the grade is 516 solve as a decimal which is3125. Giving the grade slope as a percentage is the most common way of describing slopes in the US and in Europe. The difference in elevation between points is called the rise. For example if the grade is 516 solve as a decimal which is3125.