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Pipe Water Velocity and Minimum Pipe Diameter Calculator

Velocity: ft/sec

Pipe Velocity and Diameter Calculator User Instructions:

To calculate the minimum pipe diameter required to maintain a water velocity of 5 ft/sec, follow these steps:

  1. Enter the flow rate in gallons per minute in the “Flow Rate” field.
  2. Click the “Calculate Minimum Diameter” button to calculate the minimum pipe diameter.
  3. The calculated minimum pipe diameter will be displayed in inches in the “Pipe Diameter” field.

Please note that this calculator is intended as a rough estimate and is not a substitute for more detailed calculations based on the specific conditions of your piping system. It is important to consider factors such as friction losses, water hammer, and pipe movement due to water momentum changes when designing a piping system.

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