Enter your numbers to see the result and what it means.
How this calculator works
Enter your advertising spend for a period and the number of acquisitions it produced. The calculator divides one by the other to give your cost per acquisition.
The formula
CPA = Advertising spend ÷ Acquisitions. Both must cover the same period, and an acquisition should mean the same thing in both your ad platform and your reporting.
Questions
Is CPA the same as CAC?
No. CPA usually counts media spend only. CAC is the fully loaded cost including fees, tools and sales effort, which is why CAC is almost always higher.
What CPA should I aim for?
Whatever is below the gross profit a customer generates. There is no universal figure — a $300 CPA is excellent for a $5,000 sale and ruinous for a $50 one.
Related tools
CPL Calculator
Calculate your cost per lead and see what you are really paying for enquiries.
CAC Calculator
Calculate customer acquisition cost across your whole acquisition effort, not just media.
ROAS Calculator
Work out your return on ad spend, and check it against the break-even point for your margin.
Conversion Rate Calculator
Calculate conversion rate against visitors or clicks — whichever denominator you actually mean.
Proof this works
400+ sales-qualified leads via calls and forms, tracked end to end.
If you would rather we handled it
We manage Google Ads accounts where the goal is qualified enquiries, not clicks.
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