Maximum CPC Calculator
Find the highest cost-per-click you can bid while staying at or under your target CPA, based on your conversion rate.
Formula
Maximum CPC = Allowable CPA × Conversion Rate (as a decimal)
This tells you the most you can pay per click and still land at or under your target CPA, on average, given how often your clicks turn into conversions. A higher conversion rate means you can afford to bid more per click for the same CPA target.
Worked Example
If your allowable CPA is $50 and your conversion rate is 5%, Maximum CPC = $50 × 0.05 = $2.50. Bidding above $2.50 per click will tend to push your actual CPA above $50, assuming the conversion rate holds steady.
Pair this with the CPA Calculator to check what you're actually paying today.