CPA Calculator
Calculate cost per acquisition from spend and conversions.
COST PER ACQUISITION
$50
per acquisition
CPA = total spend ÷ acquisitions. Keep it comfortably below the customer's lifetime value.
What is CPA?
Cost per acquisition (CPA) is how much you spend, on average, to win one conversion — a signup, sale, or lead. It's the bottom-line efficiency number for a campaign.
CPA = total spend ÷ acquisitions
How to read your result
- CPA should stay comfortably below the customer's value (LTV).
- It captures the full funnel, unlike CPC which stops at the click.
- Compare CPA by channel to reallocate budget to winners.
- Blended CPA (all spend ÷ all customers) tells a different story than paid-only.
Frequently asked questions
What's the difference between CPA and CAC?
They're closely related. CPA usually refers to the cost of a single conversion in a campaign, while CAC is the fully-loaded cost to acquire a paying customer across all sales and marketing.
Track this — and every customer signal — in one place
usermot is the clean, simple way to collect feedback, share a public roadmap, and ship updates your customers actually see. Free forever.
See what usermot does