Calculating Slope and Other Grading Calculations: Tools for Gaining Mastery in Grading - Landscape Site Grading Principles - page 138

Referring to Figure 9.25, you will determine the slope indicated by
the arrow between points A and B. Applying the formula S = V / H:

S is what you are going to determine
V is the difference between point B and point A = 3.7'
H = 128'
S = 3.7' / 128'
S = .0289 or .03
S = 3%

A

32.6

H = 128 feet
Horizontal Distance

B

36.3

Figure 9.25 Calculate the slope from point A to point B

In the next chapter we will consider calculating spot elevations for
different situations called for in developing landscape site-grading plans.