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Free ACOS, break-
Free Amazon Ads calculators designed to help KDP authors understand advertising performance and campaign profitability.
Use these tools to calculate ACOS, break-
Amazon Ads Break-
Calculate the maximum ACOS you can afford before losing money on a sale.
This tool helps authors understand the advertising cost threshold that keeps campaigns profitable.
Open the Break-
Typical ACOS for KDP Authors
ACOS can vary depending on competition, pricing and campaign goals.
Typical ranges for Amazon Ads campaigns:
Low competition books → 20–30% ACOS
Average campaigns → 30–50% ACOS
Aggressive growth campaigns → 50–70% ACOS
Many authors accept a higher ACOS when launching a new book to gain visibility and improve organic ranking.
Amazon ACOS Calculator
Calculate the Advertising Cost of Sales (ACOS) for your Amazon Ads campaigns.
Enter your ad spend and sales to quickly determine the ACOS percentage.
Open the ACOS Calculator
Amazon Ads Profit Calculator
Estimate the real profit generated by your Amazon Ads campaigns.
This tool compares ad spend with royalties to determine if a campaign is profitable.
Open the Profit Calculator
Why Amazon Ads calculators matter for KDP authors
Understanding your ACOS and break-
Many authors run ads without knowing the maximum ACOS they can afford.
These calculators help you quickly analyze campaign performance and make better advertising decisions.