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MarketingMar 24, 2026

CPC formula: how to calculate cost per click (and what to do with it)

A simple metric that gets misused

CPC formula

CPC (cost per click) is how much you pay for one click. The formula is simple, but the mistake is treating CPC as the goal. In SaaS, the goal is profitable customers, not cheap clicks.

Table of contents

Definition and formula

CPC = spend ÷ clicks.

Examples

  • $100 spend and 250 clicks → CPC = $0.40
  • $500 spend and 200 clicks → CPC = $2.50

Common mistakes

  • Chasing the lowest CPC and attracting the wrong audience.
  • Comparing CPC across channels with different intent (search vs social).
  • Ignoring post-click conversion rate and margin.

Metrics to pair with CPC

  • CTR (so you know if the creative hooks the right people).
  • Landing page conversion rate (signup or demo request).
  • Contribution margin (so you do not scale unprofitable traffic).

Final takeaway and next step

Use CPC to compare tests, not to declare victory. Next step: compute CPC, then run the same scenario through ROI using a realistic conversion rate and margin.

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