CPA Calculator
Cost per acquisition.
Cost per acquisition.
How to use CPA Calculator
- Enter your total ad spend and number of conversions
- Or switch to clicks-and-conversion-rate mode and pick a currency
- Read your cost per acquisition and cost per click
About CPA Calculator
The CPA Calculator works out your Cost Per Acquisition — also called Cost Per Action — in seconds. Enter your total ad spend and the number of conversions and it divides one by the other to show a clear CPA figure. Prefer to start from traffic? Switch to the clicks-and-conversion-rate mode, type in your clicks and conversion rate, and the tool estimates conversions before calculating the same result. It handles eight currencies and shows supporting numbers like cost per click alongside the headline CPA.
Because it separates spend, clicks, conversions and rate, you can use it for more than a single sum. Check whether a campaign sits under your breakeven CPA — the most you can pay for a conversion before it stops being profitable — by comparing the figure against your margin, average order value or customer lifetime value. Sanity-check a target CPA before you commit to it as a bid goal, or run the numbers channel by channel to see whether Google, Meta or somewhere else is winning you cheaper acquisitions. Note that this is a marketing tool for Cost Per Acquisition, not a calculator for the CPA accounting exam.
It's completely free with no sign-up, no limits and nothing to install. Every calculation runs entirely in your browser, so the ad spend and conversion numbers you type never leave your device or get uploaded to a server.
Frequently asked questions
- How do you calculate CPA (cost per acquisition)?
- CPA is your total ad spend divided by the number of conversions. For example, $1,000 in spend and 40 conversions gives a CPA of $25. This tool does that math instantly and also lets you derive conversions from clicks and a conversion rate.
- What is the difference between CPA and CPC?
- CPC (cost per click) is what you pay for a single click, while CPA (cost per acquisition) is what you pay for a completed action such as a sale, lead, or sign-up. When you use the clicks-and-conversion-rate mode, this tool shows both figures side by side.
- Can I calculate CPA from clicks and conversion rate?
- Yes. Switch the "Calculate from" option to "Clicks & conversion rate", then enter your clicks and conversion rate percentage. The tool multiplies them to estimate conversions, then divides your ad spend by that number to give you CPA.
- What is breakeven CPA and how do I work it out?
- Breakeven CPA is the highest cost per acquisition you can pay before a conversion stops making money, usually your profit per sale (average order value minus costs). Calculate your CPA here, then compare it to that breakeven figure: if your CPA is lower the campaign is profitable, and if it's higher you're paying too much per conversion.
- How do I calculate a target CPA for my campaigns?
- A target CPA is the cost per acquisition you aim for, usually set below your breakeven so each conversion still leaves a margin. Decide the profit you want to keep per sale, subtract it from your breakeven CPA, and use the result as your goal. Run your real numbers through this calculator to check whether current campaigns are hitting it.
- What is a good CPA?
- A good CPA depends on your industry, margins, and the value of each customer. As a rule of thumb, your CPA should sit comfortably below the profit a conversion generates. Compare your CPA to your average order value or customer lifetime value to judge whether campaigns are profitable.
- Which currencies can the CPA calculator use?
- You can choose from eight currencies, so your CPA and cost per click display in the units you actually spend and report in. Changing the currency only swaps the symbol shown; the underlying math stays exactly the same.
- Is this the same as a calculator for the CPA exam?
- No. Here CPA means Cost Per Acquisition, a marketing metric, so this tool has nothing to do with the Certified Public Accountant exam, exam eligibility, or score calculations. If you're checking whether a calculator is allowed on the CPA exam, look up the current AICPA and NASBA exam policies instead.
- Is this CPA calculator free?
- Yes, it is 100% free to use with no account, no sign-up, and no usage limits. You can run as many calculations as you like.
- Is my data uploaded anywhere?
- No. The calculator runs entirely in your browser using JavaScript. Your ad spend, conversions, and all other inputs stay on your device and are never sent to or stored on any server.