Amazon PPC ACoS and profit calculator
An original browser-based ACoS worksheet to test unit economics and advertising contribution. Calculations stay on your device.
Costs should include purchase or manufacture, fulfillment, referral fees, shipping, returns allowance and other relevant expenses. Use your own current account numbers; example values are fictional.
How to use the result
Break-even ACoS divides unit contribution before ads by the unit selling price. Target ACoS first reserves your chosen contribution goal. Observed campaign ACoS compares advertising spend with advertising-attributed sales, which is not the same as total store revenue.
A negative target is not an instruction to run negative bids. It signals that cost assumptions and profit goals cannot coexist at the given price. Your actual economics may differ after taxes, returns, coupon deductions, changes in fee structure or non-attributed sales.
For platform terminology, read the Amazon Ads ACoS guide. Continue with the break-even ACoS article to review the assumptions.