kdpbookaiKDP reference
The numbers kdpbookai checks your files against, written out for anyone to use. Each one links to the KDP help page it comes from and shows when we last checked it. Where KDP's own pages disagree, we say which value we use and why.
Checked November 7, 2026
- Trim sizes and page limitsEvery paperback and hardcover size, page limits by paper, margins, gutter, bleed and spine.
- Error messages explainedPaste a KDP message and see what it means and how to fix it, or browse the common ones.
- Rules and royaltiesRoyalty rates, weekly title limits, metadata, keywords, categories, low-content and AI disclosure.
- GlossaryBleed, gutter, ISBN, ASIN and other words you meet on the way.
