Drain Slope Calculator

Calculate drain pipe slope, drop, and grade for sanitary and storm drainage

Input Parameters

Results

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Total Drop
in
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Total Drop
ft
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Slope
%
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Est. Velocity
ft/s

Reference

IPC/UPC: 1/4" per ft for 3" and smaller 1/8" per ft for 4" and larger Min velocity 2 ft/s for self-cleaning