How do influencer platforms calculate CPM and CPC?

CPM is cost per thousand impressions, spend over impressions times 1000 and CPC is cost per click, spend over clicks, computed per creator from the fee paid and the reach or clicks driven.

Clicks are normally real and tracked so CPC is firm but impressions are frequently estimated from followers and typical view rates when real data is not shared, so CPM is softer and varies by tool.

Both are cost-efficiency metrics, not outcomes, so a low CPM or CPC is good value for reach or traffic but says nothing about conversion and inflated reach makes CPM look better than it is.

The formulas themselves are simple and standard. CPM, cost per mille, is the cost per thousand impressions: you take what you paid and divide by the impressions delivered, then multiply by a thousand, so a creator paid 500 who delivered 100,000 impressions has a CPM of 5. CPC, cost per click, is the cost per click driven: what you paid divided by the number of clicks, so the same 500 driving 1,000 clicks is a CPC of 0.50. Platforms calculate these per creator and per campaign by pairing the fee side (what you paid that creator) with the result side (impressions for CPM, clicks for CPC), which lets you compare creators and campaigns on a normalised cost basis instead of raw spend. That comparability is the whole point: CPM tells you what awareness costs and CPC what traffic costs, so you can see which creators deliver efficiently rather than just which cost the most.

The part worth understanding is where the numbers on the result side come from, because that decides how much to trust the figure. Clicks are normally real and tracked, when you use unique links or codes, the platform counts actual clicks or visits, so CPC built on tracked clicks is reasonably firm. Impressions are frequently softer, the platform may use actual impression data pulled from the creator analytics where available, which is solid or it may estimate impressions from follower count and a typical view or reach rate for that creator and platform when real impression data is not shared, which is an educated approximation, not a measured fact. So a CPM resting on estimated impressions is directional rather than precise and two tools can show different CPMs for the same creator because they estimated reach differently. The practical reading: treat CPC built on real tracked clicks as a firm efficiency measure, treat CPM as a useful but softer guide whose accuracy depends on whether the impressions are measured or estimated and where it matters, confirm the impression source. Also remember both are cost-efficiency metrics, not outcome metrics, a low CPM or CPC is good value for reach or traffic but says nothing about whether those people converted, so pair them with conversion data before judging a creator overall. So platforms calculate CPM and CPC with the standard spend-over-result formulas, the nuance is the result side, firm for tracked clicks, frequently estimated for impressions, so read CPM as directional and CPC as firmer and never as a substitute for actual outcomes.

This calculation lives in your analytics or campaign platform, not in a discovery tool, so it sits outside what Flinque does but there is one upstream connection worth drawing: CPM and CPC are only meaningful if the impressions and clicks behind them are real and a creator with inflated reach will show a flatteringly low CPM that means nothing. So vetting for audience authenticity before the campaign, which is what Flinque does, protects the integrity of these metrics by making sure the reach you are dividing your spend by is genuine. Flinque does not compute your CPM or CPC but it helps ensure the numbers feeding them came from a real audience rather than an inflated one.