See how much revenue every ad dollar brings back — and whether it actually turns a profit.
What is ROAS?
ROAS (Return on Ad Spend) tells you how much revenue you earn for every dollar you put into advertising. It is the single most-used number for judging whether a paid campaign is pulling its weight — on Google Ads, Meta, TikTok, Amazon, or anywhere else you buy traffic.
The formula is refreshingly simple:
ROAS = Revenue from ads ÷ Ad spend
A ROAS of 4 (you'll also see it written as 4x or 400%) means every $1 of ad spend brought back $4 in revenue.
How to calculate ROAS (worked example)
Say you ran a campaign that cost $1,000 and generated $5,000 in sales:
- Take the revenue the campaign drove: $5,000.
- Divide it by what you spent: $5,000 ÷ $1,000 = 5x.
So far so good — but here's the trap most dashboards hide: raw ROAS ignores your product costs. If your gross margin is 60%, only $3,000 of that $5,000 is gross profit before ads. After subtracting the $1,000 spend, your real gross profit is $2,000. That's the number that actually lands in your pocket, and it's why this calculator asks for your margin.
What is a "good" ROAS? It depends on your break-even
There is no universal "good" ROAS — a 3x can be wildly profitable for a digital product and a money-loser for a low-margin reseller. What matters is whether you clear your break-even ROAS, the point where ad-driven gross profit exactly covers ad spend:
Break-even ROAS = 1 ÷ gross margin
At a 60% margin you need roughly 1.67x just to avoid losing money; at a thin 25% margin you need 4x before you see a cent of profit. This tool draws that line for you, so you instantly know whether a campaign is genuinely profitable — not merely "positive".
How to improve a weak ROAS
If you're below target, the lever isn't always "spend less." The usual wins: tighten audience and keyword targeting to cut wasted spend, raise average order value (bundles, upsells) so each sale carries more revenue, improve landing-page conversion rate, and cut the cost of your worst-performing creatives. Because ROAS is revenue ÷ spend, you can move it from either side of the equation.
Frequently asked questions
What is a good ROAS?
There is no single number. A good ROAS is any ROAS comfortably above your break-even point, which is set by your gross margin. Many ecommerce brands aim for 4x or higher, but a 3x can be very profitable at high margins and a loss-maker at thin ones. Always compare your ROAS to your break-even ROAS, not to a generic benchmark.
How do you calculate ROAS?
Divide the revenue a campaign generated by the amount you spent on it. For example, $5,000 in revenue from $1,000 of ad spend is a 5x ROAS (or 500%). To know if that is actually profitable, factor in your gross margin to find gross profit after ad spend.
What is break-even ROAS?
Break-even ROAS is the minimum return on ad spend you need just to cover costs, calculated as 1 ÷ gross margin. At a 50% margin your break-even ROAS is 2x; at a 25% margin it is 4x. Anything above break-even is profit; anything below is a loss.
What is the difference between ROAS and ROI?
ROAS compares revenue only to ad spend. ROI (return on investment) accounts for all costs — product cost, platform fees, shipping, overhead — so it reflects true profit. Use ROAS for quick, campaign-level judgments and ROI for overall business profitability.
What is the difference between ROAS and ACOS?
They are two views of the same thing, common on Amazon. ACOS (Advertising Cost of Sale) is ad spend ÷ revenue, expressed as a percentage; ROAS is its inverse, revenue ÷ ad spend. A 25% ACOS equals a 4x ROAS. Lower ACOS and higher ROAS both mean more efficient ads.
Is a higher ROAS always better?
Not necessarily. A very high ROAS can be a sign you are under-spending and leaving growth on the table — you could often make more total profit by scaling spend at a lower (but still profitable) ROAS. The goal is profitable scale, not the highest possible ratio on a tiny budget.
What does a 4x ROAS mean?
A 4x ROAS means you earned $4 in revenue for every $1 spent on ads. Whether that is good depends on your gross margin — at a 50% margin your break-even ROAS is 2x, so 4x is solidly profitable; at a 25% margin you need 4x just to break even.
Does ROAS include product costs?
Standard ROAS does not — it only compares revenue to ad spend. That is why this calculator also asks for your gross margin and shows gross profit after ad spend and break-even ROAS, so you can see whether a campaign is truly profitable.