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Guides to publishing on KDP
Practical, plain-English guides to the decisions and rules behind a KDP paperback. Every figure is checked against KDP's own help pages, which we link at the end of each guide.
Publishing
How to make and publish a coloring book on KDP
Niche, trim size, line art that prints cleanly, single-sided pages, the cover, pricing and the KDP listing.
Read the guide · 9 min →PublishingHow to publish a children's picture book on KDP
Length, square trims, premium color, bleed and safe areas, consistent characters, pricing and the listing.
Read the guide · 9 min →PublishingKDP paperback royalties and printing costs, with worked examples
The 50% and 60% rates, printing cost formulas, the $9.99 threshold and worked examples for every book type.
Read the guide · 8 min →Formatting and rules
KDP paperback specs: trim size, paper, bleed and margins
Trim sizes and page limits, the four ink and paper options, bleed, margins by page count, spine width and image rules.
Read the guide · 10 min →RulesKDP's AI content rules: what to disclose and when
AI-generated vs. AI-assisted, worked examples of what to declare, and how to publish an AI-made book responsibly.
Read the guide · 7 min →RulesLow-content vs. regular books on KDP: ISBNs and distribution
What KDP counts as low-content, why coloring and puzzle books usually aren't, ISBN options and Expanded Distribution.
Read the guide · 7 min →Check the numbers yourself
Cover size calculator
Full-wrap cover size, spine width and pixels at 300 DPI, with a to-scale diagram.
Open the tool →Spine width calculator
Spine width for any page count and paper, and whether KDP allows spine text.
Open the tool →Royalty & printing cost
Printing cost, royalty per copy and the lowest list price for a paperback.
Open the tool →Margins & bleed
Inside and outside margins by page count, and the page size to set with bleed.
Open the tool →Ready to make the book itself?
Bookhatch plans, writes, illustrates and formats it for KDP. Start with 300 free credits.
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