Definition
Cost per acquisition is ad spend divided by the number of purchases or leads it produced.
Category: Paid media · Updated 1 Oct 2026 · BLITZ Campaign editorial
How do you calculate CPA?
CPA = ad spend ÷ conversions. Define the conversion carefully: purchase, delivered order or qualified lead.
What is a good CPA?
One below your break-even CAC. A low CPA on the wrong conversion is worse than a higher CPA on the right one.