All KDP Publishing Tools
Every calculator and generator you need to prepare, price and publish your book on Amazon KDP — 100% free, no sign-up.
KDP Cover Calculator
Get exact cover dimensions, spine width and a ready-to-download template.
Open ToolSpine Width Calculator
Calculate spine width instantly for any page count and paper type.
Open ToolHardcover Calculator
Get casewrap cover, hinge and spine dimensions for hardcover books.
Open ToolBarcode Margin Calculator
Find the correct safe placement area for your KDP back-cover barcode.
Open ToolPrinting Cost Calculator
Check Amazon KDP printing costs and estimate your royalties.
Open ToolRoyalty Calculator
Estimate your Amazon KDP royalty earnings per book sold.
Open ToolTrim Size Calculator
Find the best trim size for your book type and genre.
Open ToolBook Page Calculator
Estimate final page count from your word count and trim size.
Open ToolKDP Niche Finder
Find profitable, low-competition book niches to publish in.
Open ToolCover Template Generator
Download ready-to-use cover templates for your next book.
Open ToolLorem Ipsum Generator
Generate placeholder text to mock up your interior or cover layout.
Open Tool