CPA Calculator

Cost per acquisition (CPA) is the average amount you pay for each conversion a campaign produces. You calculate it by dividing total ad spend by the number of conversions — $2,000 across 400 conversions is a $5.00 CPA. A conversion can be whatever you count as a win: an install, a signup, a trial start or a purchase. CPA is one of the most important paid-acquisition metrics because it puts a single price tag on the outcomes you actually care about, so you can compare channels, campaigns and creatives on equal footing and see which spend is worth scaling.

CPA is often confused with CAC (customer acquisition cost), but they answer different questions. CPA measures the cost of any defined conversion — often an early action like a lead or an install — while CAC measures the fully loaded cost of acquiring a paying customer, usually across all sales and marketing, not just one campaign. A campaign can have a low CPA on installs yet a high CAC if few of those installs ever pay. Because your CPA depends on how many people convert after they click your ad, a stronger App Store listing lowers it directly — and that is exactly what Reverze helps you build: creative that turns the traffic you already pay for into more conversions.