Pipe Slope Calculator for Drainage
Drainage pipe slope is a geometry conversion from run and fall. The working calculator reports percent slope, inches per foot, pitch ratio and end invert elevation.
pipe slope calculator drainage drain pipe slope calculator sewer pipe slope calculator
Fall from slope
fall = run * slope_percent / 100
Inches per foot
in_per_ft = fall_inches / run_ft
Code boundary
This is drainage geometry only. Fixture units, venting, cleanouts, pipe material, supports and adopted-code slope minimums remain separate.
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