Author tools
Practical tools for self-publishing authors — from free calculators that price your book to pro tools that help it sell.
01Free tools3
Free forever. No sign-up, no email gate — just the numbers.
Free
01
KDP Book Sales Calculator
Turn any Amazon Best Seller Rank into daily sales and monthly royalties — eBook or paperback. FreeOpen calculator →
Free
02
Breakeven Calculator
How many copies you must sell to earn back your cover, editing, ads and writing time. FreeOpen calculator →
Free
03
Kindle Unlimited Calculator
What your KU page reads are really worth, per reader and per month. FreeOpen calculator →
02Pro tools1
Bigger tools we build for authors and publishers. Most have a free trial.