PSI to GPM Flow Rate
Result
PSI to GPM Flow Rate calculator with the required physical inputs.
Formula
- Estimate liquid flow in US gallons per minute from pressure drop using a user-supplied valve/orifice flow coefficient Cv and specific gravity. Pressure alone is not enough to determine flow.
- The main inputs are Pressure drop, Flow coefficient, Specific gravity. Enter them in the units and format shown in the calculator.
- For unit conversions, the calculator applies the conversion relationship shown above and keeps source and target units consistent with the selected options.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: PSI to GPM Flow Rate
- Pressure drop: 4 psi
- Flow coefficient: 2 Cv
- Specific gravity: 1
With ΔP = 4 psi, Cv = 2 and specific gravity = 1: flow = 4 GPM.
Sample result: Calculating…
Frequently asked questions
Why are multiple inputs required?
Estimate liquid flow in US gallons per minute from pressure drop using a user-supplied valve/orifice flow coefficient Cv and specific gravity. Pressure alone is not enough to determine flow.
What does the PSI to GPM Flow Rate calculate?
PSI to GPM Flow Rate calculator with the required physical inputs.
Which values should I enter?
Enter Pressure drop, Flow coefficient, Specific gravity using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: GPM = Cv × √(Pressure drop ÷ Specific gravity).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.