KDP Cover Size Calculator
Get full-wrap cover dimensions with a live back, spine and front diagram.
Cover Tools
Free Tools for Smarter KDP Publishing
Free KDP Tools for Smarter Publishing
Calculate royalties, design covers, format keywords, estimate profits, plan books, and optimize your KDP publishing workflow with free tools.
- 54 free tools
- No signup required
- Runs privately in your browser
Popular KDP Tools
The calculators authors reach for most when preparing a book.
KDP Spine Width Calculator
Calculate paperback spine width from page count and paper type.
Cover ToolsKDP Royalty Calculator
Estimate your royalty and profit from Kindle, paperback and hardcover sales.
CalculatorsKDP Profit Calculator
Turn royalties, ad spend and other costs into net profit, profit per book and margin.
CalculatorsKDP Keyword Formatter
Clean a keyword list and pack it into seven KDP keyword fields.
Keyword ToolsKDP Page Count Calculator
Convert word count to estimated pages, or pages to words, by trim and font size.
Book Tools
Browse All Tools
Organized by the stage of publishing you're in.
KDP Calculators
Royalties, profit, pricing, break-even and sales estimates for Kindle, paperback and hardcover books.
- KDP Royalty Calculator
- KDP Profit Calculator
- Kindle Royalty Calculator
- BSR Sales Estimator
- KDP Pricing Calculator
Cover & Print Tools
Cover dimensions, spine width, trim size, bleed, margins and image checks for print-ready files.
- KDP Cover Size Calculator
- KDP Spine Width Calculator
- KDP Trim Size Calculator
- KDP Margin Calculator
- Image DPI Checker
Keyword Tools
Format, clean, combine and count keywords for your seven KDP keyword fields.
- KDP Keyword Formatter
- Keyword Character Counter
- Keyword Deduplicator
- Keyword Combiner
- Keyword List Cleaner
Book Creation Tools
Plan, outline, count and prepare your manuscript, plus title ideas and ISBN checks.
- KDP Page Count Calculator
- Word Count Calculator
- Book Launch Checklist
- Book Title Generator
- Book Description Formatter
Marketing & Ads Tools
ACOS, TACOS, ROAS, CPC, CPA and ad profitability calculators for Amazon Ads.
- KDP Ad Profit Calculator
- ACOS Calculator
- Advertising Break-Even Calculator
- TACOS Calculator
- Conversion Rate Calculator
General Utilities
Everyday percentage, margin, date and text utilities for the publishing workflow.
All 11 utilitiesHow KDP Tools Hub Helps Authors
Self-publishing means wearing every hat. These tools take the arithmetic and guesswork out of each stage, so you can spend your time writing.
Create
Generate title ideas, outline chapters and plan your writing schedule.
Tools to createCalculate
Know your royalty, profit and break-even before you set a price.
Tools to calculateFormat
Clean up keywords and book descriptions so they're ready to paste into KDP.
Tools to formatCheck
Validate ISBNs, image resolution and A+ Content sizes before upload.
Tools to checkPublish
Get exact cover, spine, bleed and margin measurements for print.
Tools to publishMarket
Measure ACOS, ROAS and break-even CPC to run ads profitably.
Tools to market
Latest Resources
Plain-English guides to the technical side of KDP.
- How to Calculate KDP Cover DimensionsLearn the KDP paperback cover formula with bleed and spine, follow a worked 6x9 example in inches, mm and pixels, and avoid the most common cover size mistakes.Read guide
- How KDP Royalties WorkA clear guide to KDP royalties: the 35% and 70% eBook options, delivery costs and VAT, the 50% and 60% print tiers, expanded distribution and printing costs.Read guide
- How to Calculate Paperback Spine WidthCalculate KDP paperback spine width from page count and paper type, learn the 79-page spine text rule and 0.0625" clearance, with worked examples and tables.Read guide
- KDP Trim Sizes ExplainedEvery standard KDP trim size in inches and mm, the regular vs large trim rule and how it affects print cost, common sizes by genre, and how custom sizes work.Read guide
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A practical, printable checklist covering manuscript, cover, metadata, proof copies and launch. No spam, unsubscribe anytime.
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