Free tools for Amazon KDP paperbacks
Create your KDP book with the right numbers from page one.
Cover size, spine width, margins and royalties calculated from KDP's own specs, plus honest comparisons of the tools people use to make the book.
No sign-up. KDP specs checked 2026-11-13.
Example: 6 × 9 in, 200 pages, white paper
- Full cover
- 12.700 × 9.250 in
- Spine
- 0.450 in
- Printing cost
- $3.40
- Royalty at $12.99
- $4.39
BACK
FRONT
Calculators
See all →CalculatorCover sizeFull paperback cover size for Amazon KDP from trim size, paper and page count: width and height with bleed, spine width, pixels at 300 DPI and a free SVG template.CalculatorSpine widthSpine width for an Amazon KDP paperback from page count and paper type (white, cream, groundwood, standard or premium color), and whether KDP allows spine text.CalculatorRoyalty & printing costPaperback royalty per sale on Amazon.com from list price, trim size, ink, paper and page count, with KDP's printing cost, the 50% vs 60% rate and the minimum list price.CalculatorInterior marginsMinimum inside (gutter) and outside margins for an Amazon KDP paperback interior by page count, with and without bleed, plus the PDF page size to export.
Tool comparisons
See all →Prices, trials and limits read on each tool's own pages, with the sources linked. Made by the team behind KDP Coloring Book Studio: our own tools are marked “ours”.
10 tools comparedAI coloring book generators for KDP: cost per book compared10 AI coloring book generators compared for Amazon KDP by what one finished book costs, the cheapest way to start, the cover, one-sided pages, trim sizes and commercial use, from each tool's own pages.8 tools comparedBest tools to make a KDP paperback coverKDP Cover Creator, Canva, Book Brush, DIY Book Covers, kdpbook.io, KDP Builder and our own cover tools compared for Amazon KDP paperbacks: full wrap, spine, barcode area, AI art, title text, exports and price.6 tools comparedBest KDP keyword and niche research toolsPublisher Rocket, Book Bolt, KDSpy, Self Publishing Titans, BookBeam and Amazon's free search bar compared for KDP keyword, category and niche research: prices, trials, platforms and limits, from each tool's own pages.
Guides
See all →GuideHow to create a coloring book for Amazon KDPStep by step: choose a niche and trim size, make the line art, build a one-sided interior PDF, size the cover, write the listing, price it and order a proof.GuideHow to create a low-content book for KDP (journals, notebooks, planners)How to make and publish a journal, notebook, planner or logbook on Amazon KDP: interior, ISBN options for low-content books, cover, pricing and the rules that differ.GuideKDP paperback specs checklistEvery number KDP checks on a paperback in one list: trim sizes, page limits, bleed, margins, spine, cover size, barcode area, file format and printing cost.