PSI to GPM Calculator: Convert Pressure to Flow Rate

Calculate Gallons Per Minute (GPM)

Please enter a K-factor.
Please enter the pressure in PSI.

Result:

Calculated GPM:

Quickly convert Pounds per Square Inch (PSI) to Gallons Per Minute (GPM) with our easy-to-use calculator. Ideal for engineers, plumbers, and DIY enthusiasts, this tool helps determine fluid flow rates based on pressure and the device's K-factor. Perfect for designing irrigation systems, fire suppression, or analyzing pump performance.

Formula:

The calculator uses the following common formula to determine the flow rate:

GPM = K × √PSI

  • GPM: Gallons Per Minute (the calculated flow rate)
  • K: The K-factor (flow coefficient) of the device (e.g., nozzle, sprinkler head, valve)
  • PSI: Pressure in Pounds per Square Inch

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