Enter the pump RPM and the pump displacement (in^3/revolution) into the RPM to Flow Rate Calculator. The calculator will evaluate the RPM to Flow Rate.

- All Rate Calculators
- Well Water Flow Rate Calculator
- Drain Flow Rate Calculator
- Pneumatic Cylinder Airflow Calculator

## RPM to Flow Rate Formula

The following two example problems outline the steps and information needed to calculate the RPM to Flow Rate.

**FR = RPM * D / 231**

- Where FR is the RPM to Flow Rate (GPM)
- RPM is the pump RPM
- D is the pump displacement (in^3/revolution)

## How to Calculate RPM to Flow Rate?

The following example problems outline how to calculate RPM to Flow Rate.

Example Problem #1:

- First, determine the pump RPM.
- The pump RPM is given as: 400.

- Next, determine the pump displacement (in^3/revolution).
- The pump displacement (in^3/revolution) is provided as: 2.5.

- Finally, calculate the RPM to Flow Rate using the equation above:

FR = RPM * D / 231

The values provided above are inserted into the equation below and computed.

FR = 400 * 2.5 / 231 = 4.239 (GPM)

Example Problem #2:** **

For this problem, the variables required are provided below:

pump RPM = 600

pump displacement (in^3/revolution) = 3

Test your knowledge using the equation and check your answer with the calculator..

FR = RPM * D / 231** = ?**