Free tools for authors
No sign-up, no email address. Every answer has its own link, so you can bookmark it or send it to a co-author.
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KDP royalty calculator
What you earn per sale on Amazon.com: ebook at 35% or 70% (with the delivery cost), paperback at 50% or 60% after printing. Amazon's own published numbers, checked 29 September 2026.
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ARC launch timeline
Put in your release date and get a dated plan for your advance copies, from getting the file ready to thanking your readers. Print it or keep the link.