Enter the motor RPM and pulley diameters into the calculator to determine the blower RPM. This calculator helps in configuring the correct pulley system for a blower.

Blower RPM Formula

The following formula is used to calculate the blower RPM.

BRPM = (MRPM * MPD) / BPD

Variables:

  • BRPM is the blower RPM
  • MRPM is the motor RPM
  • MPD is the motor pulley diameter (inches)
  • BPD is the blower pulley diameter (inches)

To calculate the blower RPM, multiply the motor RPM by the motor pulley diameter, then divide by the blower pulley diameter.

What is Blower RPM?

Blower RPM (Revolutions Per Minute) is the rotational speed at which the blower operates. It is a critical parameter for ensuring the proper functioning of the blower, which is used in various applications such as HVAC systems, combustion air supply, and material handling. The RPM is influenced by the motor speed and the size of the pulleys used in the belt drive system.

How to Calculate Blower RPM?

The following steps outline how to calculate the Blower RPM.


  1. First, determine the motor RPM (MRPM).
  2. Next, measure the motor pulley diameter (MPD) in inches.
  3. Then, measure the blower pulley diameter (BPD) in inches.
  4. Use the formula to calculate the Blower RPM (BRPM) = (MRPM * MPD) / BPD.
  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.

Motor RPM (MRPM) = 1750 RPM

Motor Pulley Diameter (MPD) = 3 inches

Blower Pulley Diameter (BPD) = 6 inches