CPA Calculator
Last updated: July 2026
Calculate advertising cost per acquisition and estimate acquisitions available from a future budget.
Cost per acquisition (CPA)
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- Estimated acquisitions from future budget: —
- Revenue from current acquisitions: —
- Return on ad spend: —
- Gross value minus ad spend: —
On this page
Quick summary: Calculate advertising cost per acquisition and estimate acquisitions available from a future budget. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator estimates
Calculate advertising cost per acquisition and estimate acquisitions available from a future budget. It is designed for fast planning and comparison in the United States. The output is an estimate, not a binding quote, approval, tax determination, insurance offer or professional recommendation.
How to use it
Enter the requested values using a single consistent time period and currency. Select Calculate, review the headline result and supporting figures, then change one assumption at a time to compare another scenario.
How the calculation works
CPA equals total advertising spend divided by conversions or acquisitions. Average acquisition value is used to show revenue and a simple ROAS comparison.
Important limitations
Attribution, refunds, gross margin, sales costs and conversion quality are not included. CPA targets should be compared with contribution margin and customer lifetime value.
Frequently asked questions
Is the result exact?
No. It is a planning estimate based on the assumptions entered.
Can I compare different scenarios?
Yes. Change one input at a time so you can see which assumption changes the result.
Does the calculator store my inputs?
The calculation runs in the browser and does not require an account. Avoid entering unnecessary confidential information.