CPA Calculator
Calculate Cost Per Acquisition (CPA) - the average cost to acquire one customer or conversion. Essential for ROI-focused campaigns.
Total amount spent on advertising
Number of conversions/acquisitions
Formula
CPA = Total Ad Spend / Total ConversionsWhere:
Understanding CPA
CPA (Cost Per Acquisition) measures the total cost to acquire one customer or conversion. It's the ultimate performance metric for businesses focused on ROI, directly tying marketing spend to business outcomes.
Why CPA is Critical
- Profitability: If your CPA is higher than customer lifetime value (LTV), you're losing money
- Budget Allocation: Identify which channels deliver the lowest CPA
- Scale Decisions: Know exactly how much you can spend to acquire new customers profitably
- Campaign Optimization: Test and optimize to drive CPA down over time
What's a Good CPA?
A "good" CPA depends entirely on your business model and customer lifetime value. The rule of thumb:
CPA should be ≤ 30% of Customer Lifetime Value (LTV)
Example: If your average customer generates $1,000 in lifetime revenue, your target CPA should be $300 or less.
Pro Tip: Track CPA by channel, campaign, and audience segment. What works for one audience may not work for another - granular tracking is essential.