Calculadora de CPA
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
CPA = gasto_total / conversões
About this calculator
The CPA (Cost Per Acquisition) Calculator is an essential tool for marketing professionals and business managers who want to measure the efficiency of their investments in customer acquisition campaigns. CPA is calculated by dividing the total campaign spend by the number of conversions obtained. This metric indicates how much you are paying, on average, to acquire a new customer or qualified lead.
To use the calculator, enter the total amount spent on a campaign (including ads, tools, team salaries, etc.) and the number of conversions generated (sales, sign-ups, downloads, etc.). The result is the CPA, which should be compared to the customer's average value (LTV) to assess profitability. A very high CPA relative to LTV may indicate a need for campaign optimization.
This tool is useful in various scenarios: marketing budget planning, channel performance analysis (Google Ads, Facebook, email marketing), A/B testing of creatives and landing pages, and evaluation of seasonal campaigns. Important: CPA does not consider future revenue or repurchase; therefore, use it together with other metrics like ROAS and ROI.
Cautions: ensure that total spend includes all direct and indirect campaign costs. Clearly define what constitutes a conversion (e.g., sale, lead, subscription) to avoid distortions. Remember that the ideal CPA varies by industry and business model; compare with your market benchmarks. Avoid making decisions based solely on CPA without considering customer lifetime value.
Frequently asked questions
What is CPA and why is it important?
CPA stands for Cost Per Acquisition, a metric that shows how much you spend to acquire a customer or conversion. It is important for evaluating the efficiency of marketing campaigns and ensuring that acquisition costs do not exceed the value generated by the customer.
What is the difference between CPA and CPC?
CPC (Cost Per Click) measures the cost paid for each click on an ad, while CPA measures the cost per conversion (sale, lead, etc.). CPA is more focused on the final outcome, whereas CPC is an intermediate metric.
How do I know if my CPA is good?
Compare the CPA to the customer's Lifetime Value (LTV). Ideally, LTV should be at least 3 times greater than CPA. Also, research benchmarks for your industry to have a reference.
What should I do if my CPA is too high?
Analyze campaign targeting, improve ad quality, optimize the landing page, test different channels, and reduce unnecessary costs. Consider also increasing the average order value or conversion rate.
Can I use CPA to compare different campaigns?
Yes, as long as the conversions are of the same type and the analyzed period is consistent. Remember to also consider the volume of conversions, as campaigns with low CPA but few conversions may not be scalable.