eCPM Calculator (Effective Cost Per Mille)
Measure how much you earn per 1,000 impressions. Enter any two of ad revenue, impressions and eCPM and the calculator solves the value you leave blank.
How to calculate eCPM
- Enter your ad revenue and total impressions to get eCPM.
- Or enter a target eCPM with one known value to solve the other.
- Read the result and copy it for your revenue report.
Examples
eCPM from revenue and impressions
$40 revenue, 10,000 impressions
$4.00 eCPM
Revenue from a target eCPM
$4 eCPM, 10,000 impressions
$40.00 revenue
Frequently asked questions
What is the eCPM formula?
eCPM equals total ad revenue divided by impressions, multiplied by 1,000. For example, $40 of revenue from 10,000 impressions is a $4.00 eCPM.
What is the difference between eCPM and CPM?
CPM is the price an advertiser pays per 1,000 impressions. eCPM is the effective revenue a publisher earns per 1,000 impressions across all sources, including filled and unfilled inventory.
How do I estimate revenue from eCPM?
Enter your eCPM and impressions. The calculator multiplies them and divides by 1,000 to estimate the revenue those impressions should produce.
Why allow four decimal places?
Low eCPM values are common on display inventory, so the result keeps up to four decimals. That lets you compare placements without small figures rounding to zero.
Is the calculation private?
Yes. Everything runs in your browser and nothing you enter is uploaded or stored.
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