Quick answer: ROAS (return on ad spend) = revenue from ads ÷ ad spend. A 4:1 ROAS means $4 back for every $1 spent. Enter your revenue and spend below; add your profit margin to see your break-even ROAS and whether the campaign is actually profitable.
ROAS calculator
Used for break-even ROAS & profit.
Used for cost per acquisition.
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ROAS
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Return on ad spend (%)
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Break-even ROAS
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Cost per acquisition
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How ROAS is calculated
ROAS = revenue ÷ ad spend, usually shown as a ratio (4:1 or “4x”) or a percentage (400%). But ROAS ignores margin: a 4x ROAS on a product with a 20% margin can still lose money. Your break-even ROAS = 1 ÷ gross margin — at a 60% margin you need about 1.67x just to break even. This tool shows both so you know whether a campaign is genuinely profitable, and computes cost per acquisition when you enter conversions.
Frequently asked questions
What is a good ROAS?A common benchmark is 4:1 (400%), but the right target depends entirely on your profit margin. Low-margin businesses need a higher ROAS; high-margin ones can profit at a lower ROAS.
What is break-even ROAS?The ROAS at which revenue exactly covers product cost plus ad spend. It equals 1 divided by your gross margin — e.g. a 50% margin needs a 2.0x ROAS to break even.
ROAS vs ROI — what is the difference?ROAS measures revenue per ad dollar; ROI measures profit per dollar after all costs. ROAS is a media-efficiency metric; ROI is a profitability metric.
Is this calculator free?Yes — free and private, calculated entirely in your browser.