# Ad - Revenue Per Mile (RPM)

## 1 - About

Revenue Per Mile (RPM) is a revenue metric that can be calculated:

Advertising

## 3 - Formula

$$\text{RPM} = \frac{Revenue}{Impressions} . 1000$$ where:

## 4 - Type

### 4.1 - Impression

Impression RPM is the page revenue per thousand impressions

ie For every 1,000 ad impressions served how much revenue was made.

### 4.2 - Session

Session RPM is the session revenue per thousand impressions known also as EPMV

For every 1,000 ad sessions how much revenue was made.