Most beginners stare at ACoS and cannot connect it to actual money. Enter your ad spend, ad sales, and margin. Get all three numbers plus a plain profitable or losing verdict against your break-even line.
ACoS · ROAS · profit per ad dollar · verdict
Break-even ACoS equals your pre-ad margin. Profit per ad dollar is gross, before overhead and returns. Use it to rank campaigns, then confirm net profit in your own books.
Want this breakdown in your inbox, plus the target ACoS that hits your profit goal at this margin?
Here is the trap. A seller sees a 25% ACoS and has no idea if that is good or bad. Good compared to what? The number sits there with nothing to compare it against, so the seller either panics or celebrates for no reason.
ACoS only means something next to your margin. If your product margin is 30% and your ACoS is 25%, you are keeping money on every ad-driven sale. If your margin is 20% and your ACoS is 25%, you are paying to lose sales. Same ACoS, opposite outcome, and the number alone never tells you which one you are living in.
This calculator anchors ACoS to your margin, then hands you ROAS and profit per ad dollar so the picture is complete.
Ad spend, ad sales, and your pre-ad margin. Pull them straight from your campaign report.
ACoS, its ROAS mirror, and the gross profit each ad dollar actually returns at your margin.
Profitable or losing, measured against the only line that matters: your break-even ACoS.
ACoS is advertising cost of sales. You divide ad spend by ad sales and multiply by one hundred. Spend 250 dollars to make 1,000 dollars in ad sales and your ACoS is 25 percent. It tells you what share of each ad-driven sale went back as ad cost.
ROAS is the mirror image. ROAS equals ad sales divided by ad spend, while ACoS is the inverse as a percent. A 25 percent ACoS is the same as a 4.0 ROAS. This calculator shows both so you can speak either language.
A good ACoS sits below your profit margin. If your margin is 30 percent, any ACoS under 30 percent keeps money after ad cost, and anything above it loses money on each ad-driven sale. Your margin is the break-even line, not a generic number.
Yes. Run it as many times as you want with no account. Drop your email only if you want the breakdown sent to your inbox.
A healthy ACoS still hides wasted spend on search terms that never convert. Our free Search Term Report Miner reads your report and shows the exact dollars you burned last month, bucketed and ready to cut.
Mine My Wasted Ad Spend → Free. Paste your report and see the leaks in seconds.