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CPA Solver
Calculated Result
CPA = spend / conversions
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Target Logic: CPA
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What is CPA?
CPA (Cost Per Action or Acquisition) tells you exactly how much you spend to get one customer to take a specific desired action — a purchase, a subscription, a lead form, etc. It's the most direct measure of campaign profitability.
Worked Example
A retargeting campaign spends $6,000 and drives 300 purchases. CPA = $6,000 ÷ 300 = $20 per acquisition. If a customer's average value is $80, a $20 CPA gives a healthy 4× return.
Related PERFORMANCE Metrics
Conversion Rate (CVR)
CVR (Conversion Rate) measures the percentage of clicks or visits that result in a desired action — like a purchase, sign-up, or form submission. It's a core indicator of landing page quality, UX, and offer relevance.
CPL
CPL (Cost Per Lead) measures how much you spend for each qualified lead generated — most commonly used in B2B, real estate, and service industries where the sales cycle is too long to measure direct purchase conversions.
ROI
ROI (Return on Investment) measures the net profitability of a campaign relative to its cost. Unlike ROAS which is revenue-based, ROI accounts for profit margins by subtracting spend from revenue before dividing — giving a true picture of business value created.
Expert Insights
How do I improve my CPA?
Improving CPA requires a dual focus on quality and efficiency. For PERFORMANCE metrics, we recommend auditing your top-performing segments and re-allocating budget from underperforming areas to those with higher baseline CPA potential.
Is CPA a primary KPI?
While CPA is a critical indicator of regional performance, it should always be viewed alongside downstream metrics like ROI to ensure volume isn't coming at the expense of profitability.