ROAS Calculator

What is ROAS?

ROAS, or return on ad spend, measures how much revenue you earn for every dollar you put into advertising. It is the clearest single signal of whether a paid campaign is pulling its weight. A ROAS of 4x means every $1 of ad spend brought back $4 in revenue; a ROAS of 1x means you earned back exactly what you spent, before you have paid for the product, shipping, or your team.

Marketers lean on ROAS because it is fast to read and easy to compare across campaigns, channels, and creatives. A figure of around 2.8x is commonly cited as an ecommerce average, but that number varies significantly by industry and platform: apparel, supplements, and high-ticket goods sit at very different levels, and Meta, Google, and TikTok do too. So treat 2.8x as loose context, not a universal target. The number that actually matters is your own break-even ROAS, covered below, because a campaign at 3x can be highly profitable for one store and a slow loss for another, entirely because of margin.

The ROAS formula

The formula is deliberately simple: divide the revenue a campaign generated by what you spent to run it, over the same time window.

The result is a multiple, usually written with an "x" (for example, 3.5x). Keep the two figures on a like-for-like basis: use revenue and spend from the same platform, the same date range, and the same attribution window, or the ratio will mislead you.

A worked example

Say you spent $2,000 on a Meta campaign last month and it generated $7,000 in revenue from 140 orders. Your ROAS is $7,000 ÷ $2,000 = 3.5x. Your cost per acquisition (CPA) is $2,000 ÷ 140 orders = $14.29, and your revenue per order is $7,000 ÷ 140 = $50.

On the surface, 3.5x looks healthy. Whether it actually is depends on your margin, which is exactly what break-even ROAS tells you. Plug your own numbers into the calculator above to see all four figures at once.

Break-even ROAS

Break-even ROAS is the point where a campaign exactly covers its costs: no profit, no loss. It is the most important number in this whole exercise, because it converts a generic benchmark into your target. You calculate it from your profit margin:

If your profit margin is 40% (0.40), your break-even ROAS is 1 ÷ 0.40 = 2.5x. Every campaign above 2.5x makes money; anything below it loses money, even if the raw ROAS looks respectable. In the worked example above, a 3.5x ROAS on a 40% margin is genuinely profitable; the same 3.5x on a 25% margin (break-even 4x) is quietly unprofitable.

This is why "calculate ROAS" and "calculate break-even ROAS" go together. The return on ad spend calculator above gives you the score; your break-even ROAS tells you the number you need to beat. If you want to work margin backward from selling price, cost, shipping, and ad spend, use the profit margin calculator, which outputs your break-even ROAS directly. To go from your costs per order to a break-even ROAS and CPA, and see whether your current ROAS clears it, use the break-even ROAS calculator.

How to improve your ROAS

There are only two levers: earn more revenue per dollar spent, or spend fewer dollars for the same revenue. In practice that means lifting conversion rate and average order value, or accepting a lower return on the first order because lifetime value pays it back, tightening targeting so you pay less per click and per acquisition, and, above all, running better creative. The ad, the hook, and the angle drive far more of your ROAS than bid tweaks do, which is why fixing creative is usually the fastest way to move the number.