The Pipe Grade calculator computes the depth at the end of a trench needed for a pipe to be laid with a desired grade.
INSTRUCTIONS: Choose units and enter the following:
Depth of Trench (D): The calculator returns the depth in inches. However, this can be automatically converted to compatible units via the pull-down menu.
The depth (d) of the fall is a function of the Run (R) and the grade (G):
d = G/(12 inches) *R
The end depth of the trench is:
D = d + W + x