SellMath / Advertising
CPM Calculator
Calculate advertising cost per thousand impressions.
Your estimate
- Cost per thousand impressions
Calculated in your browser. Your entries are not sent anywhere.
How the calculation works
CPM = ad spend ÷ impressions × 1,000
A dash means the ratio is undefined or the target cannot be reached.
Frequently asked questions
What is an impression?
An impression is an ad display, not necessarily a unique viewer or a click. Use spend and impressions from the same reporting period.
What if impressions are zero?
CPM is undefined when impressions are zero; the calculator shows a dash.