Stop guessing your Amazon Ads.

Find your real break-even ACOS in seconds. and profit calculator designed for KDP authors running Amazon advertising campaigns.

Free ACOS, break-even and profit calculators for Amazon Ads campaigns.

Free Amazon Ads calculators designed to help KDP authors understand advertising performance and campaign profitability.

Use these tools to calculate ACOS, break-even advertising cost and the real profitability of your Amazon Ads campaigns.


Amazon Ads Break-Even Calculator

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.




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.




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.

Want full control over your Amazon Ads?
Know exactly when your ads are profitable — before you lose money.




Why Amazon Ads calculators matter for KDP authors

Understanding your ACOS and break-even point is essential for running profitable advertising campaigns on Amazon.
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.

Stop wasting money on Amazon Ads.

Track your real profit. Know exactly when to STOP or SCALE.

No spreadsheets. No guesswork. Just clear decisions.