Free Online Manning Pipe Flow Calculator

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Manning Formula Uniform Pipe Flow at Given Slope and Depth

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  --CAUTION: If you have downloaded the spreadsheet prior to September 24, you may have received incorrect results!--

Set units:
Flow, Q
Velocity, v
Velocity head, hv
Flow area
Wetted perimeter
Hydraulic radius
Top width, T
Froude number, F
Shear stress (tractive force), tau

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