Glossary
CPC: what it is, the formula, and how to read cost per click
What CPC means, the formula, why link clicks and all clicks give different numbers, and how to judge cost per click against your CPL.
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CPC means cost per click: ad spend divided by clicks. Spend US$ 800, get 1,600 link clicks, and your CPC is US$ 0.50. The catch is the word "clicks". Ads Manager reports two different numbers under similar names, and the one most media buyers quote is the wrong one for traffic cost. Read CPC as a diagnosis of how expensive your traffic is, never as the goal of the campaign.
Formula
CPC = ad spend ÷ clicks in the selected period.
Before you compare anything, decide which click you mean.
| Column | What it counts |
|---|---|
| CPC (cost per link click) | Clicks that opened your destination |
| CPC (all) | Every click on the ad: link clicks plus reactions, comments, shares, profile name, image expansion |
CPC (all) is always the lower of the two, sometimes by a wide margin on a post with heavy engagement. Put that number in a client report and call it traffic cost, and you are underreporting what a visit costs. Use link clicks for anything that ends on a landing page.
What a good number looks like
There is no market figure to copy. Work backwards from what you sell.
Say your landing page turns 10 percent of visits into leads. A US$ 0.50 CPC gives you a US$ 5 lead. If the business can pay US$ 12 per lead, the click has room to double before the campaign stops paying. Now say the page converts 2 percent. That same US$ 0.50 click produces a US$ 25 lead, and the click was never the problem.
A good CPC is whatever keeps CPL or CPA inside your limit at the volume you need. A cheap click on a page that does not convert is just cheap.
What makes the number move
CPC is not an independent lever. It is the output of two other numbers:
CPC = CPM ÷ (1,000 × CTR).
So a CPC drop comes from cheaper delivery or from a better click rate, and that tells you where to look:
- CPC up, CTR flat: auction cost. Check CPM, audience size, seasonality, competition.
- CPC up, CTR down: the creative. The hook is losing people, or the same people keep seeing it. Check frequency.
- CPC down, CPL up: cheaper traffic, worse traffic. Usually broader targeting or a weaker match between ad and offer.
Placement mix matters too. Delivery shifting into cheaper placements can pull CPC down and intent with it.
Check the click against the outcome
Pull CPC and CPL side by side for the same period before you touch a budget. If the click is cheap and the lead is not, the fix is on the page, not in the auction. The paid media reporting page shows how to keep both columns in one view.
Frequently asked questions
Which CPC does Ads Manager show by default?
It depends on the column set you selected. Check whether the column says cost per link click or CPC (all), because the two numbers are not interchangeable.
Is a lower CPC always better?
No. Cheaper clicks from a looser audience often convert worse, which raises your cost per lead even as the click gets cheaper.
Can I compare CPC between Meta Ads and Google Ads?
Only as context. The auctions, the intent and the click definitions differ, so compare cost per lead or cost per sale instead.