ROAS Calculator

ROAS means return on ad spend. It is a campaign efficiency ratio that divides revenue attributed to advertising by the advertising cost used to produce that revenue. Ecommerce advertisers see it in platforms such as paid social and search, where quick comparisons across ads, audiences, products, and time periods are needed.

A ROAS calculator does not claim the campaign made a net profit. The revenue still needs to cover product costs, delivery, seller fees, payment processing, returns, discounts, overhead, and sometimes agency or creative expense. Attribution settings can also overstate or understate what the ad truly caused. ROAS is one useful lens, not a complete income statement.

Enter the ad spend for a defined campaign and the revenue attributed over the matching period and attribution rule. Divide revenue by spend. A value of 3.00x means three dollars of attributed sales per dollar spent. The secondary result subtracts only ad spend from revenue to make the remaining amount visible before other costs.

To find a workable performance target, consider contribution margin. If only 30% of a sale remains before ads, a campaign generally needs more than 3.33x revenue-to-spend merely to cover advertising under that simplified assumption. Use a profit calculator to incorporate actual product and selling expenses.

Advertising can grow sales quickly while hiding poor economics. Sellers who monitor revenue without required ROAS may increase spend on products whose margin cannot pay for acquisition. Reviewing ROAS with margin supports decisions about budget, creative tests, landing pages, offers, and which products deserve promotion.

Keep attribution comparisons consistent: platforms, windows, currencies, and inclusion of tax or shipping may differ. A strong reported ROAS can also reflect customers who would have purchased without an ad. Combine the output with store-level profit trends, customer acquisition cost, and repeat-purchase evidence before making large budget changes.