Pipe Flow Calculator

Calculate flow rate, velocity, and head loss in pipes using Hazen-Williams.

Distance across a circle through its center.
in
Linear measurement in the specified unit.
ft
Multiplier used in the calculation.
The speed or frequency at which something occurs.
GPM

Results

Velocity:
Calculated speed or velocity.
-ft/s
Head Loss:
Calculated head loss based on your inputs.
-ft
Hydraulic Gradient:
Calculated hydraulic gradient based on your inputs.
-ft/100ft
Reference: AWWA/EPA Standards. Hazen-Williams equation.