Cost Per Acquisition (CPA) Calculator

Advertising budget

Cost per Acquisition (CPA)

0.00$

How to use this calculator?

1. Enter your total advertising budget
2. Enter the number of conversions obtained
3. Your CPA is calculated automatically

Quick answer

How do you calculate cost per acquisition (CPA)?

CPA is the ad spend divided by the number of conversions obtained (sales, sign-ups or leads). Formula: CPA = ad spend / number of conversions. Example: spending €1,000 to get 50 sales gives a CPA of 1,000 / 50 = €20.00. Each customer therefore cost you €20 in advertising.

Ad spendConversionsCPA
€50020€25.00
€1,00050€20.00
€2,00040€50.00
€3,000150€20.00
€5,000125€40.00
€75030€25.00

About the CPA Calculator

What is it?

The CPA (Cost Per Acquisition) calculator measures how much it costs you on average to acquire a customer, sale or lead through your advertising campaigns.

Why use it?

CPA is the key indicator of campaign profitability. If your CPA exceeds the margin you make on a sale, you're losing money on every conversion.

How does it work?

Divide the total campaign budget by the number of acquisitions (sales, leads, sign-ups...) obtained. The result is your average CPA.

Usage tips

  • Clearly define what counts as an acquisition in your context
  • Compare your CPA to your gross margin per order to check profitability
  • Use customer lifetime value (LTV) to justify a higher CPA for repeat buyers
  • Optimize your landing page to reduce CPA without adjusting bids
  • Segment by channel to identify which generates the best CPA
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