BIM

Open-Channel Flow Calculator

Calculates the wetted perimeter, hydraulic radius, flow area, Chezy coefficient and flow velocity using Chezy and Manning's formula.

This calculator uses Chézy and Manning’s formula to calculate the wetted perimeter, hydraulic radius, flow area, Chézy coefficient and flow velocity.

For experimental values of Manning’s n factor, click here

Required Information:

Enter the Slope:

Enter the Channel Bottom Width (ft):

Enter the Flow Depth (ft):

Enter the Channel Top Width (ft):

Enter the Channel Height (ft):

Enter the n value:

Results

The wetted perimeter is (ft)

The flow area is (ft2)

The hydraulic radius is (ft)

The C value is

The flow is (ft3/s)

The flow is (gal/min)

The velocity is (ft/s)