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# What is the full form of RPM?

## 1) RPM: Revolutions Per Minute

The full form of RPM is Revolutions Per Minute. Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis. RPM tells how many times a mechanical component revolves around its axis in one minute. So, Revolutions Per Minute (RPM) is the rotational speed of a mechanical component such as the crankshaft of an engine, power generator turbine, CD or DVD player and turbocharger.

Example to understand the RPM is the tachometer in the dashboard of a car. It measures how many times the crankshaft of an engine revolves around its axis in one minute. Generally, a tachometer measures RPM in thousands. So if its needle is at 2 it means the engine is at 2000 rpm and its crankshaft is revolving 2000 times in one minute.

## 2) RPM: Revenue Per Mille

Another full form of RPM is Revenue per mille. Revenue per mille (RPM) is the estimated earnings that accrue for every 1000 impressions received (in Latin, mille means thousand), a commonly used measurement in radio, television, newspaper, magazine, out-of-home, and online advertising. It is used in marketing as a benchmarking metric to calculate the relative cost of an advertising campaign or an ad message in a given medium. It is calculated by dividing the estimated earnings by the number of page views, impressions or queries received, then multiplying by 1000.

## 3) RPM: Revenue Per Thousand Impressions

In Google AdSense metrics RPM stands for Revenue Per Thousand Impressions. Revenue per 1000 impressions (RPM) represents the estimated earnings you’d accrue for every 1000 impressions you receive. RPM doesn’t represent how much you have actually earned; rather, it’s calculated by dividing your estimated earnings by the number of page views, impressions, or queries you received, then multiplying by 1000. Following is the formula to calculate RPM:
`RPM = (Estimated earnings / Number of page views) X 1000`