Cost Per Acquisition (CPA) Calculator
Works out what each sign-up, lead or sale cost you in ad spend.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
CPA = spend ÷ conversions left per conversion = profit per conversion − CPA
The most you can pay and still break even is the profit from one conversion.
What to watch out for
Count one kind of conversion at a time. A cost per lead and a cost per sale are very different numbers, and mixing them hides both.
Frequently Asked Questions
How do I calculate CPA?
Divide spend by conversions. 1,000 spent for 40 conversions is 25.00 each.
What is the difference between CPA and CAC?
CPA can count any action, such as a lead or a free trial, and usually only the ad spend. Customer acquisition cost counts new paying customers and usually all sales and marketing costs.
How is CPA linked to CPC?
CPA is CPC divided by the conversion rate. A cost per click of 1.25 and a 5% conversion rate give a CPA of 25.00.