Marketing
ROAS Calculator
Calculate return on ad spend from spend and revenue, and see the break-even ROAS and real profit once your margin is factored in. Free, instant, no signup.
Enter your ad spend and the revenue it generated. Add your profit margin to see the break-even ROAS.
All calculations happen in your browser. Nothing is stored.
✳ Free · No signup · Runs in your browser — we never store your numbers
Small business guide
What this tool helps you do
This ROAS calculator tells you your return on ad spend as a multiple (like 4x) and as a percentage, from just two numbers: what you spent on ads and the revenue those ads generated. Add your profit margin and it also calculates the number that actually matters — your break-even ROAS, the point below which your ads lose money even when revenue looks healthy.
A 3x ROAS sounds good until you remember that revenue is not profit. If your product margin is 25%, you need a 4x ROAS just to break even. Many small businesses run "profitable-looking" campaigns for months before realizing the ads never covered product costs. This calculator makes that math impossible to miss.
How to use this tool
- 1
Enter your ad spend in dollars — the total you paid the ad platform for the period or campaign.
- 2
Enter the revenue from ads — sales you can attribute to those ads, not your total revenue.
- 3
Optionally enter your profit margin % (gross margin on the products sold) to see your break-even ROAS and net profit after product costs.
- 4
Read the results: ROAS as a multiple and a percentage, your net return, and — with a margin entered — whether the campaign actually made money.
Formula
ROAS = revenue from ads ÷ ad spend. Break-even ROAS = 100 ÷ profit margin %. Net profit = (revenue × profit margin % ÷ 100) − ad spend.
- ROAS is a revenue multiple, not a profit figure. A 4x ROAS means $4 of revenue per $1 of ad spend — before product costs.
- Break-even ROAS rises fast as margins shrink: 50% margin needs 2x, 25% margin needs 4x, 10% margin needs 10x.
- Net return (revenue minus ad spend) ignores product costs; net profit (with margin) is the honest number.
- Use the same time period for spend and revenue, and account for attribution lag on longer sales cycles.
Examples
A campaign that clears break-even
An online store spends $1,000 on ads that generate $4,000 in tracked revenue. Product margin is 30%.
Inputs
- Ad spend: $1,000
- Revenue from ads: $4,000
- Profit margin: 30%
Result
ROAS is 4x (400%), with a net return of $3,000 over ad spend. At a 30% margin, break-even ROAS is 3.33x — so this campaign clears it, with a net profit of $200 after product costs.
Even a strong-looking 4x ROAS only produced $200 of actual profit here. The gap between "net return $3,000" and "net profit $200" is your cost of goods — never skip the margin input.
Positive ROAS, negative profit
A boutique spends $500 on ads and books $1,200 in revenue. Its blended margin is 25%.
Inputs
- Ad spend: $500
- Revenue from ads: $1,200
- Profit margin: 25%
Result
ROAS is 2.4x, but at a 25% margin the break-even ROAS is 4x. Net profit is −$200 — the campaign is losing money despite a positive-looking 2.4x ROAS.
This is the trap ROAS sets for thin-margin businesses. Every dollar of ad spend here brought back $2.40 in revenue but only $0.60 in gross profit. Either the margin, the targeting, or the offer has to improve before scaling this campaign.
Key terms
ROAS (return on ad spend)
Revenue attributed to ads divided by the amount spent on those ads, usually shown as a multiple (4x) or percentage (400%).
Break-even ROAS
The minimum ROAS at which ad revenue covers both ad spend and product costs — calculated as 100 divided by your profit margin percentage.
Net profit after product costs
Revenue times your margin, minus ad spend: what the campaign actually added to (or took from) your bottom line.
How to interpret the result
Break-even ROAS matters more than the headline number
There is no universal "good ROAS" — it depends entirely on your margin. A 3x ROAS is excellent for a 60% margin service business (break-even at 1.67x) and a money-loser for a 25% margin retailer (break-even at 4x). Judge every campaign against your own break-even ROAS, not against benchmarks or platform averages.
Clean attribution makes or breaks the calculation
ROAS is only as accurate as the revenue number you feed it. If you can't tie sales back to specific campaigns, your ROAS is a guess. Tag every campaign link consistently — the free UTM Link Builder on this site helps — and check what the ad platform claims against what your sales records actually show, since platforms tend to over-attribute.
Common mistakes
- Treating ROAS as profit. A 4x ROAS on a 20% margin product loses money — check break-even ROAS first.
- Using total revenue instead of ad-attributed revenue, which inflates ROAS and hides failing campaigns.
- Ignoring costs outside the ad platform: agency fees, creative production, and discounts all reduce the real return.
- Comparing your ROAS to other businesses with different margins — the same number can mean profit for them and losses for you.
- Judging a campaign too early. Small spends produce noisy revenue data; give campaigns enough volume before scaling or killing them.
Frequently asked questions
What's a good ROAS?+
It depends on your margin, not on industry folklore. Break-even ROAS is 100 divided by your margin percentage: a 50% margin business breaks even at 2x, while a 20% margin business needs 5x. A "good" ROAS is comfortably above your own break-even, with room for overhead and profit.
What's the difference between ROAS and ROI?+
ROAS compares revenue to ad spend only. ROI compares profit to total investment, including product costs, fees, and labor. A campaign can have a high ROAS and a negative ROI at the same time — which is why this calculator's margin input and net profit output exist.
Why does break-even ROAS matter more than my platform's ROAS number?+
Because the platform shows revenue multiples, and revenue isn't yours to keep — product costs come out first. Break-even ROAS translates your margin into the minimum acceptable ROAS, turning a vanity metric into a pass/fail test.
Should I include agency fees or software costs in ad spend?+
For a truer picture, yes. Platform ROAS only counts media spend. If you pay an agency or tools to run the ads, add those costs to the ad spend input to see your all-in return.
Is it really free?+
Yes. This ROAS calculator is completely free — no signup, no account, and no usage limits. Same for every other tool on this site, including the Meta Ads and Google Ads copy generators if you're writing the campaigns you're measuring here.
Do you store my data?+
No. All the math runs in your browser, and nothing you enter is sent to a server or stored anywhere.