True ROAS Calculator

The ROAS number you see inside Facebook Ads Manager or Google Ads is almost always inflated. Ad platforms count conversions generously — Facebook uses a 7-day click and 1-day view attribution window, meaning it takes credit for sales that happen up to a week after someone clicked your ad, and even sales from people who merely saw an ad without clicking. Google does something similar with its 30-day click window. Both platforms also double-count sales when a customer interacts with ads on multiple platforms before purchasing, and neither deducts returns or cancellations from reported revenue.

True ROAS strips away the reporting inflation by starting with your actual net revenue — after subtracting returns and refunds — then accounting for the real costs embedded in every order: cost of goods sold, Shopify transaction fees, and shipping. These costs eat directly into the revenue number that platform-reported ROAS treats as pure profit. A campaign reporting 4x ROAS might look healthy until you realize that COGS, shipping, and a 12% return rate bring your actual return down to 2.1x.

True ROAS is the number that determines whether you are actually making money from paid ads. Platform-reported ROAS tells you how much revenue your ads generated; True ROAS tells you how much of that revenue you actually kept. Every scaling decision — increasing budgets, launching new campaigns, cutting underperformers — should be based on True ROAS, not the inflated number from your ad dashboard.

Your break-even ROAS is the minimum return on ad spend you need to cover your product costs — calculated as 1 ÷ your gross margin. If your gross margin is 40%, your break-even ROAS is 1 ÷ 0.40 = 2.5x. That means any campaign with a True ROAS below 2.5x is losing money, even if the reported ROAS looks "decent." A store with 25% margins needs 4x ROAS just to break even, while a store with 70% margins can profit at just 1.43x.

Most Shopify stores don't know their break-even ROAS, which means they cannot objectively evaluate whether a campaign is profitable. They see "3x ROAS" and assume it's working, when their margins might require 3.5x to cover costs. Use the advanced mode of the calculator above to find your break-even ROAS. Once you know it, you have a concrete threshold for every campaign — scale anything above it, cut anything below it.

ROAS is the single most important metric for evaluating paid advertising performance. It tells you whether your ad campaigns are generating more revenue than they cost — the fundamental question every marketer needs answered.

Without accurate ROAS tracking, you’re essentially flying blind with your ad budget. You might be pouring money into campaigns that look good on paper (high clicks, lots of impressions) but don’t actually drive profitable sales.

The challenge is that platform-reported ROAS (what Facebook, Google, and TikTok tell you) is often inflated. Ad platforms count conversions generously and frequently double-count sales across channels. Independent attribution gives you the real numbers.