What it does
This calculator takes four numbers for one product (sale price, total cost per unit, conversion rate and the ACOS you want to run at) and returns your break-even ACOS and the bids that go with it.
Free tool
Amazon ACOS and bid calculator
Find the ACOS where an ad sale stops making money, and the highest bid that keeps you on the right side of it.
Amazon break-even ACOS and target bid calculator
Enter your product's numbers. The results update as you type.
Product cost (COGS) + Amazon referral fee + FBA / fulfilment: every cost except ad spend.
Orders ÷ ad clicks. Pull it from your search-term report; 5–15% is typical.
The ACOS you want to run at. Keep it below your break-even to stay profitable.
Your profitability baseline
Profit / unit
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Profit margin
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Break-even ACOS (= your margin)
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Above this ACOS, ad sales lose money.
Your bid targets
Break-even CPC
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Most you can pay per click and not lose money.
Target CPC (max bid)
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Starting max bid to hit your target ACOS.
Figures are in your marketplace currency. Target CPC is a starting max bid, not the price you'll always pay: Amazon charges at or below your bid, so your realised ACOS usually lands at or under target.
About this calculator
How to read the result
Break-even ACOS is the line. Below it each ad sale leaves a profit; above it, ad sales lose money. Break-even CPC is the most you can pay for a click and still break even. Target CPC is a starting max bid for the ACOS you chose. Amazon charges at or below your bid, so your real ACOS often lands at or under the target.
The formula in plain words
Profit per unit is price minus cost. Margin is profit divided by price, and break-even ACOS equals that margin. A click is worth conversion rate times price, so break-even CPC is break-even ACOS times conversion rate times price. Target CPC uses your target ACOS in the same formula.
WisePPC reads your own Amazon Ads and Seller Central data, so you can see ACOS and profit for your real products instead of typed-in estimates.
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