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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:
    fps

    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