What is cost per click?
Average CPC is the amount of advertising spend per recorded click: ad spend divided by clicks in the same reporting scope.
Average CPC = ad spend ÷ clicks. In an illustrative example, spending 1,000 currency units for 200 clicks gives a CPC of 5 units.
Keep the currency, campaign scope and dates aligned. A spend total from one period and a click total from another cannot produce a meaningful average for either period.
Average cost and maximum bid are different
Average CPC summarizes spending that has occurred. A maximum CPC bid is a bidding setting. The number entered as a bid is not automatically the final average shown in reporting.
Read the actual label before comparing two “cost” figures. CTR is a ratio of clicks to impressions, while CPC is a cost per click.
What did those clicks produce?
Low-cost clicks can still bring visitors who do not match the intended customer or complete a useful action. Inspect qualified inquiries, purchases and conversion definitions alongside CPC.
The nine ChatGPT ad case reports show why currency and attribution need to remain attached to their numbers. A disclosed CPC is not a universal platform price or a prediction of profit.
Sources and scope
Source-language entry records a source check on 2026-10-18. This adaptation preserves that provenance and does not represent a new audit of the cited pages.