CPM Calculator
Cost per thousand, and the CPC it implies.
CPM
$6.45
$0.72 implied cost per click
CPC is CPM divided by ten times the click-through rate. That relationship is why creative matters so much on CPM-priced platforms — doubling click-through halves your effective cost per click without the auction price changing at all.
How the CPM Calculator works
CPC is CPM divided by ten times click-through rate. That relationship is why creative matters so much on CPM-priced platforms — doubling click-through halves your effective cost per click without the auction price moving at all.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How is CPM calculated?
Spend divided by impressions, times a thousand. £8,000 across 620,000 impressions is a £12.90 CPM.
How do CPM and CPC relate?
CPC equals CPM divided by (CTR × 10). At a £12 CPM and 1% click-through, the implied CPC is £1.20. Halving that CPC means doubling click-through, not renegotiating the auction.
Why does CPM rise as I scale?
Because platforms show ads to the most responsive people first. Reaching further into an audience means bidding against more competitors for less interested people.
Is a low CPM good?
Only if the traffic converts. Cheap impressions on an uninterested audience cost less per thousand and more per order, which is the trade every low-CPM placement is offering.