Amazon ACoS Calculator
ACoS (Advertising Cost of Sale) measures how much you spend on ads relative to the sales those ads directly generate. Enter your ad spend and ad sales to see your ACoS and ROAS instantly.
Free · No Seller Central login required · Results instantly
Your advertising numbers
Total ad spend across all campaigns for the period.
Sales your ads directly generated for the same period, as reported by your ad platform.
Your result
Enter your advertising spend and advertising sales to calculate your ACoS.
How this is calculated
- ACoS
- Advertising Spend ÷ Advertising-Attributed Sales
- ROAS
- Advertising-Attributed Sales ÷ Advertising Spend
A given ACoS isn't automatically good or bad: it depends on your margin structure and where a listing is in its lifecycle. This tool only compares your ACoS against a target or break-even ACoS you provide yourself, never a generic industry rule. This is an estimate from the numbers you enter, not a review of your actual Seller Central account.