Enter your total ad spend and total conversions to instantly calculate your cost per acquisition.
Cost Per Acquisition (CPA) is the average amount you spend to acquire one customer, lead, or conversion. It's one of the clearest indicators of campaign efficiency because it connects ad spend directly to the outcome you actually care about — not just clicks or impressions.
CPA is sometimes called Cost Per Action or Cost Per Lead, depending on whether you're tracking sales, sign-ups, downloads, or another defined conversion event.
Example: $3,000 spent for 60 conversions gives a $50.00 CPA.
A good CPA is one that's comfortably below your average customer value or lifetime value, leaving room for profit after product and operating costs. The 'right' number is different for every business.
CPC measures cost per click; CPA measures cost per completed conversion. A campaign can have a low CPC but a high CPA if traffic doesn't convert well.
Yes. Just use total leads generated as your conversion count — the formula works identically for leads, trials, sign-ups, or any other defined action.
Common causes include weak landing pages, broad targeting, high competition on keywords, or a mismatch between ad messaging and what the offer actually delivers.
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