RPM is short for revolutions per minutes.

It is used to indicate the speed of something by saying how many times per minute it will go round in a circle.

In manual cars, rpm measures the number of engine cycles and then indicates the appropriate time to move between speeds either by moving to a higher speed or less speed.

**Formula to calculate rpm.**

**Example:**

The earth makes one revolution is 525,600 minutes, calculate its rpm.

Therefore, the earth’s rpm is 0.000001902.