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Free KDP tools and calculators

Everything you need to size, price and format a book for Amazon KDP, plus printable puzzle makers. The numbers come from the same rulebook our layout engine uses.

Calculators & checkers

  • KDP Spine Width Calculator

    Spine width from page count and paper type, with the spine-text rule.

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  • KDP Cover Size Calculator

    Full-wrap cover size in inches, mm and pixels, plus a downloadable template.

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  • KDP Printing Cost Calculator

    Print cost per copy and the minimum list price KDP will accept.

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  • KDP Royalty Calculator

    Royalty per sale for print and Kindle at any list price.

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  • KDP Trim Sizes

    Every standard KDP trim drawn to scale, with page limits.

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  • KDP Margins & Bleed Calculator

    Gutter by page count, outside margins and page size with bleed.

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  • KDP Rejection Decoder

    Paste KDP's rejection email and see each issue with its fix.

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  • Word Count to Page Count Calculator

    Estimate book pages from a word count or from Word pages.

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  • KDP Description Formatter

    Bold, italics, headings and lists in the HTML KDP accepts.

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Printable puzzle makers

  • Free Printable Word Search Maker

    A printable word search from your own words, with an answer key.

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  • Free Printable Sudoku Maker

    Printable sudoku from easy to expert, each with one solution.

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  • Free Printable Maze Maker

    Printable mazes in any size, with the solution path.

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Skip the manual work

kdpbook.us writes, illustrates and formats the whole book and exports KDP-ready files. 2,000 free credits, no card.

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kdpbook.us

AI book studio for Amazon KDP. Written, illustrated, typeset to KDP’s live print rulebook, and exported ready to publish. Not affiliated with Amazon.

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Free KDP Tools

  • Spine width calculator
  • Full-wrap cover calculator
  • Printing cost & royalty calculator
  • Margins, gutter & bleed
  • KDP rejection decoder
  • Printable word search maker
  • Printable sudoku & maze makers
  • All 12 KDP tools →

Make Money & SEO Guides

  • How to make money on Amazon KDP
  • Free AI book generator (2,000 cr)
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  • AI coloring book generator
  • AI children's book generator
  • AI word search & puzzle maker
  • 2026 KDP AI disclosure rules
  • All KDP income guides →

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  • Plans & unit credit prices
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