ROAS Calculator

ROAS stands for return on ad spend. It tells you how much revenue you earned for every dollar you put into ads. A ROAS of 3 means every $1 of ad spend brought back $3 in sales. This ROAS calculator gives you that number, the same figure as a percentage, and what is left over after you pay the ad bill.

ROAS is the fastest read on whether a campaign is working. You can compare a Meta campaign against a Google campaign, or this week against last week, without knowing anything else about the account. It is also the number most ad platforms optimize toward, so knowing your real ROAS helps you set bid targets that match your business instead of guessing.

The catch is that ROAS only looks at revenue and ad spend. It says nothing about what your product costs you, what shipping costs, or what the payment processor takes. Two stores can both run a 3x ROAS while one is making money and the other is quietly going broke. Treat ROAS as your speed read, not your profit statement.

The formula is simple:

ROAS = revenue from ads / ad spend

Use the numbers loaded into the calculator above. You spent $1,000 on ads and those ads generated $3,500 in revenue. Divide $3,500 by $1,000 and you get 3.5. That is a 3.5x ROAS, or 350% if you prefer percentages.

The last output, revenue minus ad spend, is $3,500 minus $1,000, or $2,500. That is what is left after the ad platform is paid. It is not profit, because you still have to buy and ship the product.

Two things decide whether your number is honest. First, use the same date range for spend and revenue, and pick one source of truth. Platform reported revenue is almost always higher than what your store actually recorded, because the platform claims credit for sales it only touched. Second, decide up front whether you are measuring one campaign or the whole account. Blended ROAS, meaning total store revenue divided by total ad spend, is a different number than campaign ROAS, and the two get mixed up constantly.

There is no universal good ROAS. The right target depends on your margin. A store selling a $100 product with $50 of costs needs a 2x ROAS just to break even, so 3x is healthy. A brand with 85% margins can be profitable at 1.5x and can afford to buy more traffic than the first store ever could. Most ecommerce brands land somewhere in the low single digits, often between 2x and 4x on cold traffic, with retargeting and email pulling higher. Run the break even ROAS calculator first, then judge your number against that instead of against a figure you read on a forum.

To move ROAS up, work in this order. Raise average order value, since more revenue per order lifts the top of the fraction without costing you more clicks. Bundles, volume discounts, and a real post purchase upsell are the usual levers. Next, fix the landing page, because conversion rate and ROAS move together and page changes are cheaper than creative changes. Then cut the losers. Most accounts have a handful of ad sets spending at half the account average return, and turning them off raises the blended number overnight. Creative comes last in effort but matters most in ceiling. New angles, not new colors, are what unlock a step change.