Free tools
Free tools for self-published authors
Quick calculators and checks for pricing, titles, and covers — no account needed.
KDP Royalty Calculator
Calculate your ebook royalty under the 70% and 35% plans.
Print Cost Calculator
Estimate paperback printing cost and per-copy royalty.
Title Character Counter
Check your title length against Amazon's display limits.
Cover Thumbnail Preview
See your cover at real Amazon thumbnail sizes.