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Cost per engagement & CPM calculator
Two creators quoting different fees for different audiences cannot be compared on the fee alone. Cost per engagement and CPM put them on the same scale — which is the right way to compare attention, and still not a way to compare sales.
The arithmetic
CPE = fee ÷ (likes + comments); CPM = fee ÷ views × 1,000
What it does not tell you
- Both measure attention bought, not outcomes. The cheapest CPM in a roster is regularly the worst performer on revenue.
- Views are counted differently on every platform, and a three-second view is not a viewing. Compare CPM within a platform, not across them.
- It prices the post you already ran. Using last month's CPE to predict next month's assumes the algorithm will treat the creator the same way twice.
- Saved posts, shares and comments that start conversations are worth more than likes, and none of these figures distinguish between them.
Questions
›What is a good cost per engagement?
It varies enormously by platform, country and category, so the useful comparison is between the creators you are actually considering rather than against a benchmark from a report. Work out CPE for each one at the fee they quoted, and the outliers in both directions are the interesting ones — an unusually low CPE is sometimes a bargain and sometimes an audience that engages with everything and buys nothing.
›Is CPM or CPE better for judging creator value?
CPM measures how cheaply you bought reach; CPE measures how cheaply you bought attention. CPE is the more demanding of the two and usually the more informative, because reach with no engagement is close to worthless. But both stop at attention, and the question you actually care about — what did it sell? — needs a tracked link and a promo code to answer.
›How do I compare a creator's cost against the sales they drove?
Divide what you paid them by the number of attributed sales for cost per acquisition, and compare that against your margin per order. That is the comparison that decides whether to rebook someone, and it requires attributing sales to creators individually — which is what this product exists to do.
Estimates are fine. Proof is better.
This page works with the numbers you can see from outside. What it cannot tell you is what a creator sold. CreatorLift gives each creator a tracked link and a unique promo code, matches orders back to them, and stores the rule that matched each one — so the answer survives someone asking how you know. The pilot is ₹999 ($12) for 30 days on your own store.
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