Free calculators for self-publishers
Work out what a book will earn, cost and look like before you publish it. Every tool is free, runs in your browser and needs no sign-up. Fees and rates were checked against each platform's own pages in November 2026.
KDP royalty calculator
What you keep per sale on Amazon KDP at the 35% and 70% rates.
Word count to pages
How many pages a word count makes, by book size and font.
KENP earnings calculator
What Kindle Unlimited page reads pay.
Self-publishing cost calculator
Editing, cover, formatting and marketing, with break-even sales.
Book pricing calculator
A starting price for your ebook by length and genre.
Where to sell ebooks
What you keep per sale on KDP, Gumroad, Etsy, Payhip and your own site.
KDP AI disclosure checker
Whether you must declare AI use when you upload to KDP.
Have a book in mind? Turn your idea into a finished ebook.