OxifyCPA calculator (cost per acquisition)
A free cost per acquisition calculator: see what your CPC and site conversion rate need to be to stay under your target CPA. Lime cells are at or below your target; red are above.
Your numbers
CPA = CPC ÷ conversion rate
Cost per acquisition is how much you spend on average to win one paying customer. A $0.85 click on a site converting at 2.2% costs $0.85 ÷ 0.022 = $38.64 per customer, so a cheaper click and a better-converting site both move it, and the grid above shows which one moves it further for you.
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CPA questions, answered
How do you calculate CPA?
Divide what you spent by the number of conversions it produced: CPA = ad spend ÷ conversions. If you know your cost per click and your site conversion rate, the same number is CPA = CPC ÷ conversion rate. For example, a $0.85 CPC and a 2.2% conversion rate give $0.85 ÷ 0.022 = $38.64 per acquisition, which is the default in the calculator above.
What is CPA (cost per acquisition)?
Cost per acquisition is the average amount you pay in advertising to win one conversion, usually a purchase. It is a campaign metric. Customer acquisition cost (CAC) is the broader cousin: it usually adds every sales and marketing cost over a period, not just ad spend.
Is cost per conversion the same as CPA?
Yes, when the conversion is a sale. Ad platforms label it cost per conversion or cost per result; the calculation is identical, ad spend divided by conversions. This page works as a cost per conversion calculator for any conversion you track.
What is target CPA?
Target CPA is the most you are willing to pay for one conversion. Google Ads uses it in Target CPA bidding to set bids automatically. Enter yours as the target acquisition cost above and the grid shows which CPC and conversion rate combinations keep you under it.
What is a good CPA?
One you can afford. On a first order, your CPA should sit below the gross profit of that order: a store with a $60 average order value and a 50% gross margin breaks even at a $30 CPA. If customers reliably buy again, you can pay more, up to a share of their lifetime value.
How do I lower my CPA?
Lower the cost per click or raise the conversion rate; those are the only two inputs. Raising average order value does not change CPA, but it raises the CPA you can afford, which is often the faster lever. See how much a higher AOV is worth with the AOV calculator, or how cart upsells raise it.