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Pipe Water Velocity and Minimum Pipe Diameter

Use the water velocity form to calculate the velocity of water in a pipe. Use the second form to calculate the diameter of a pipe required for 5 fps pipe velocity.

Learn more about the units used on this page.

Water Velocity Calculator

Flow Rate:
Pipe Inside Diameter:
Water Velocity:

Minimum Pipe Diameter (5 fps) Calculator

Flow Rate:
Minimum Pipe Diameter:

The Equation

This calculator uses this formula to determine the water velocity inside of a pipe.

Reference: Washington State University

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