Enter the RPM (revolutions per minute) and the diameter of the wheel or rotor in feet into the calculator to determine the linear velocity in feet per minute.

RPM to Feet Per Minute Formula

The following formula is used to convert RPM to feet per minute.

FPM = RPM * Diameter * π

Variables:

  • FPM is the linear velocity in feet per minute
  • RPM is the rotational speed in revolutions per minute
  • Diameter is the diameter of the wheel or rotor in feet
  • π (Pi) is a constant approximately equal to 3.14159

To calculate the linear velocity in feet per minute, multiply the RPM by the diameter of the wheel or rotor and then by the constant π (Pi).

What is RPM?

RPM stands for revolutions per minute, which is a unit of rotational speed that measures the number of full rotations completed in one minute around a fixed axis. It is a common unit used in various applications such as automotive engines, industrial machinery, and consumer electronics.

How to Calculate Feet Per Minute from RPM?

The following steps outline how to calculate the linear velocity in feet per minute from RPM.

  1. First, determine the RPM (rotational speed in revolutions per minute).
  2. Next, determine the diameter of the wheel or rotor in feet.
  3. Use the formula FPM = RPM * Diameter * π to calculate the linear velocity.
  4. Finally, calculate the Feet Per Minute (FPM).
  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 (rotational speed) = 120 revolutions per minute

Diameter of the wheel or rotor = 2 feet