What is a good ROAS?
There is no universal number — anyone who quotes one is guessing. A good ROAS is any ROAS above your break-even ROAS. A business with 80% margins can thrive at 1.5×, while a reseller on 20% margins needs 5× just to survive. Calculate your break-even ROAS first, then judge every campaign against that line.
What is the difference between ROAS and ROI?
ROAS measures gross ad performance: revenue divided by ad spend. ROI measures actual financial return: net profit divided by total cost, including the cost of the goods you sold. A campaign can show a 3× ROAS and still lose money if your product cost is high.
How do I calculate break-even ROAS?
Break-even ROAS equals 1 divided by your gross margin. If your gross margin is 40%, your break-even ROAS is 1 ÷ 0.40 = 2.5×. Below that number, every extra unit of ad spend loses money. The calculator derives it automatically from your revenue and COGS.
Why is my ROAS positive but my profit negative?
Because ROAS ignores what your product costs you. If you spend 1,000 to generate 3,000 in revenue but the goods cost 2,500, your ROAS is a flattering 3× while your net profit is −500. That gap is exactly what the break-even ROAS figure exists to expose.
What is ACOS and how does it relate to ROAS?
ACOS (Advertising Cost of Sale) is the inverse of ROAS expressed as a percentage: ad spend divided by revenue. A 4× ROAS is a 25% ACOS. Amazon sellers usually work in ACOS; Meta and Google advertisers usually work in ROAS. This calculator shows both so you never have to convert by hand.
Should COGS include shipping and payment fees?
For a realistic result, yes. Include every variable cost tied to fulfilling that order: product cost, packaging, shipping, payment processing and expected returns. Fixed costs such as rent, salaries or software belong in a separate profit-and-loss statement, not in this per-campaign calculation.
Can I use it for Facebook, Google, TikTok and Amazon Ads?
Yes. The maths is platform-agnostic. Take the spend and the attributed revenue from any ad platform — Meta Ads, Google Ads, TikTok Ads, Amazon Ads, Pinterest or LinkedIn — add your cost of goods, and the calculator handles the rest. Just compare like with like: same campaign, same date range.
Does this calculator store or send my data?
No. Every calculation runs in your own browser using JavaScript. Your ad spend, revenue and cost figures are never uploaded, never stored on a server and never seen by anyone but you. The only things saved locally are your preferred currency and theme, so the tool remembers them next time.
Is the calculator free, and do I need an account?
It is free and there is no account. There is no trial, no email wall and no paid tier hiding the useful numbers. The site is funded by advertising, which is why you will see clearly marked ad slots around the content.
Can I share my results with a colleague?
Yes. "Copy results" puts a plain-text summary on your clipboard. "Copy link" encodes your three figures into the URL, so the person opening it sees the calculator pre-filled with your numbers. The figures travel inside the link itself — nothing is uploaded.
Still stuck?
If your question is not here, send it to us — most of what is on this page arrived that way. And if a calculation looks wrong, tell us the exact three numbers you entered; corrections to the maths are treated as urgent.