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Free Tool / Amazon advertising

Amazon ACoS & Break-Even Calculator

Compare advertising cost of sales with the contribution left on every product sale.

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No login · No signup · Calculated locally in your browser

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Check Your Ad Efficiency.

Complete the inputs to see an immediate, explained result. Use an example to learn the tool.

No conversion: use the same currency for every amount.
Advertising Performance

Use ad-attributed sales—not total business revenue.

Per-Unit Economics

Enter the price and variable costs for the same product.

Enter your information or load an example to begin.
What this tool answers

How much of my ad-attributed revenue am I spending on ads—and what is my estimated break-even point?

Amazon sellers comparing advertising efficiency with unit economics.

Step 1

Enter

Enter ad spend and ad-attributed sales.

Step 2

Review

Add selling price, cost of goods, Amazon fees and other per-unit costs.

Step 3

Decide

Compare current ACoS with your estimated break-even ACoS.

Know the limitation: An estimate based on your inputs, not a substitute for complete account profitability or TACoS analysis.

Need help putting the result into practice?

Make The Next Decision Count.

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