Gpm Pipe Size Calculator

Introduction: Selecting the right pipe size is crucial in fluid systems to ensure proper flow rates and prevent inefficiencies. Our GPM Pipe Size Calculator helps you determine the optimal pipe size based on input flow rate and velocity.

Formula: The pipe size is calculated based on a formula that considers the desired flow rate (GPM) and fluid velocity. This formula ensures accurate determination of the required pipe size in inches.

How to Use:

  1. Enter the desired flow rate in gallons per minute (GPM).
  2. Enter the fluid velocity in feet per second (ft/s).
  3. Click the “Calculate” button to obtain the optimal pipe size in inches.

Example: For example, if the desired flow rate is 100 GPM and the fluid velocity is 5 ft/s, the calculated pipe size could be 20 inches (assuming a simple linear relationship for demonstration purposes).


  1. Q: Why is selecting the right pipe size important? A: Proper pipe sizing ensures the desired flow rates, minimizes pressure losses, and optimizes the efficiency of fluid systems.
  2. Q: Can this calculator be used for gas flow calculations? A: This calculator is primarily designed for liquid flow calculations. Gas flow calculations involve additional factors and may require different formulas.
  3. Q: Is the calculated pipe size suitable for all fluids? A: The calculator’s accuracy may vary based on fluid properties. Consult fluid dynamics experts or relevant standards for precise calculations.

Conclusion: The GPM Pipe Size Calculator is a valuable tool for engineers and professionals involved in fluid system design. Use this calculator to ensure efficient and optimized pipe sizing for your specific application.

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