Free with a Skopx account
CPM Calculator: cost per 1,000 ad impressions
CPM Calculator
How it works
Two numbers in, the third one out.
Enter two numbers
Type any two of ad cost, impressions and CPM. Leave the one you want empty.
Press Calculate
The calculator works out the missing number in your browser.
Check the formula
The result shows the formula with your numbers in it, so you can check the sum yourself.
How to read a CPM
Three things to know before you compare two numbers.
Compare like with like
Compare CPM between ads shown to the same kind of audience in the same kind of placement. A different audience changes what 1,000 impressions are worth.
Impressions are not people
One person can see the same ad several times, and each time counts. Look at reach when you want to know how many people saw it.
Cheap is not the goal
CPM tells you what it costs to be seen, not what you got for it. Read it beside clicks and sales.
Questions
What is CPM?
CPM is the cost of 1,000 ad impressions. An impression is one showing of an ad, and the M stands for mille, the Latin word for thousand.
How is CPM calculated?
CPM = ad cost ÷ impressions × 1,000. For example, $250 for 50,000 impressions is a CPM of $5.
What does CPM Calculator cost?
CPM Calculator is free with a Skopx account. You sign in before the calculator appears, and making an account costs nothing.
What happens to the numbers I type?
They stay in your browser. The calculator does the sum on your device and sends nothing you type to Skopx.
What can it not do?
It cannot tell you whether a CPM is good or bad, and it does not know any ad platform's prices. It only does the sum for the numbers you give it.
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