Cost per click (CPC) is both a bidding option and a reporting metric. As a bid, max CPC is the most you are willing to pay for a click. As a metric, average CPC is total cost divided by total clicks over a period. In keyword research tools, a CPC figure is an estimate of what advertisers have been paying for that keyword.
How to calculate it
Average CPC is a simple ratio, but compare it only across like-for-like campaigns and periods.
Average CPC = Total cost / Total clicks
Example: $1,200 / 300 clicks = $4.00Why CPC varies so much
Click prices depend on how many advertisers want the same searcher and how much each conversion is worth to them. B2B SaaS keywords often carry high CPCs because a single customer can be worth a lot over their lifetime. Location, device, time of day and your own ad quality also move the price.
Keyword tool CPC estimates are useful for comparing keywords and as a rough signal of commercial value, including for SEO prioritization. They are not quotes. Your real CPC depends on your ads, pages and bidding.
Put CPC in context
A high CPC is fine if conversions are worth it, and a low one is wasteful if the clicks never convert. Judge CPC together with conversion rate and the value of a conversion.
- Cost per acquisition shows whether the click price is affordable.
- Quality Score components show whether relevance is inflating the price.
- Impression share lost to rank shows whether you are being outbid or out-qualified.
Example
Expensive but worth it
Hypothetical company Quarrystone sells audit software where an average customer pays several thousand dollars a year. Its main keyword costs far more per click than its blog-traffic keywords, but those clicks convert to demos at a healthy rate. The team keeps bidding and cuts the cheap, low-intent keywords instead.
Common mistakes
Comparing CPC across platforms directly
A LinkedIn click and a Google search click come from different contexts and intents. Compare cost per qualified lead instead.
Questions
No. It is an estimate based on historical data. Your actual price depends on your bids, quality and the competition at the moment of each auction.
