Tool updated September 22, 2026

Back to calculator

Amazon Ads ACOS calculator changelog

Initial Amazon Ads ACOS calculator

Introduced KDP-specific advertising guardrails built from each book's estimated Amazon.com royalty.

  • Added paperback, hardcover, and Kindle eBook break-even ACOS calculations using the shared KDP royalty engine.
  • Added target profit, maximum CPC, target CPC, and conversion-rate bid planning.
  • Added an optional campaign check for actual ACOS, CPC, conversion rate, CTR, and campaign profit.
  • Added formula guidance, methodology, source links, FAQs, and search structured data.