ROAS & CPA Calculator
Enter your campaign data to calculate ROAS, CPA and net profit.
What do ROAS and CPA actually measure?
They are the two core efficiency metrics in direct-response advertising. Each answers a different question — and confusing them leads to the wrong decisions.
How many euros of revenue you generate for every euro spent on ads. A ROAS of 4x means you earn €4 in sales for every €1 spent. The primary metric in ecommerce, where each conversion has a known and variable value.
How much it costs you to get one conversion — a sale, a lead, or a sign-up. The primary metric in lead generation and B2B, where there is no immediate transaction value and the deal closes later.
What ROAS do you need to be profitable?
Your minimum profitable ROAS depends on your margin, not on a generic benchmark. The reference formula:
A store with 20% margins needs a ROAS of 5x to break even. One with 60% margins is already profitable at 1.7x. Industry benchmarks are just a reference — your target ROAS always starts from your actual margin.
ROAS vs. CPA: when to use each
They are complementary metrics, not alternatives. Use ROAS when each conversion has a known and variable value. Use CPA when the value is fixed or realised later.