Calculate Cost Per Acquisition with this FREE advertising performance tool. Enter your spend and conversions to instantly see how much each acquisition costs.
CPA Result
How to use CPA
CPA is calculated by dividing total ad spend by total conversions. Enter your advertising spend and the number of conversions. The calculator divides spend by conversions to show your cost per acquisition.
Worked example
If a campaign spends $2,400 and generates 80 acquisitions, its CPA is $30. Compare that $30 with the gross profit or expected lifetime value created by an acquisition.
Interpret the result
A lower CPA is useful only when conversion quality remains stable. Segment CPA by campaign, audience and conversion type so inexpensive but low-value actions do not hide weak performance.
FAQ
What is CPA (Cost Per Acquisition)?
CPA helps you understand how much it costs to generate one customer, lead, signup, or other conversion from your advertising.
How is CPA calculated?
CPA is calculated by dividing total ad spend by total conversions.
Why is CPA important?
CPA helps you understand how much it costs to generate one customer, lead, signup, or other conversion from your advertising. It gives you a simple way to compare performance across campaigns, platforms, and time periods.
What is a good CPA?
A good result depends on your industry, audience, offer, placement, and campaign goal. Compare against your historical performance and profitability instead of relying on a universal benchmark.
How can I improve my CPA?
To lower CPA, improve targeting, test stronger offers and landing pages, reduce wasted spend, and increase your conversion rate.
Is CPA the only metric I should focus on?
No. Use it together with related metrics such as revenue, profit, conversion rate, traffic quality, and customer value.
How does CPA differ from related metrics?
CPA focuses on acquisition cost, while CPC focuses on click cost and CPM focuses on impression cost.
Does this CPA calculator store my data?
No. The calculation runs in your browser, and the values you enter are not saved by this tool.
Can I use this CPA calculator for any campaign?
Yes. You can use it for paid social, search, display, video, email, affiliate, or any campaign where you have the required inputs.
What should I do if my CPA is worse than expected?
Check your targeting, creative, landing page, offer, tracking setup, and traffic quality. Then compare results by channel or campaign to find where performance is slipping.