Enter the RPM and the dispenser volume into the calculator to determine the flow rate in mL/min. This calculator helps in converting the rotational speed of a pump to the volumetric flow rate.

RPM to mL/min Formula

The following formula is used to convert RPM to mL/min.

FR = (RPM * DV) / 1000

Variables:

  • FR is the flow rate (mL/min)
  • RPM is the revolutions per minute
  • DV is the dispenser volume (μL/rev)

To convert RPM to mL/min, multiply the RPM by the dispenser volume (in μL/rev), then divide by 1000 to convert μL to mL.

What is RPM to mL/min Conversion?

RPM to mL/min conversion is a process of translating the rotational speed of a pump (in revolutions per minute) to the volumetric flow rate (in milliliters per minute). This is commonly used in applications involving peristaltic pumps, where the flow rate needs to be controlled and is directly proportional to the RPM of the pump head.

How to Calculate Flow Rate from RPM?

The following steps outline how to calculate the flow rate from RPM.


  1. First, determine the RPM (revolutions per minute).
  2. Next, determine the dispenser volume (DV) in μL/rev.
  3. Use the formula FR = (RPM * DV) / 1000 to convert to mL/min.
  4. Finally, calculate the flow rate (FR) in mL/min.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

RPM (revolutions per minute) = 120 RPM

Dispenser Volume (DV) = 50 μL/rev