Practical tools for serious indie authors.
No signup. No fluff. No catch.
Use these to estimate, check, and sanity-test the parts of publishing that usually create the most friction.
KDP Book Calculator
Enter your word count — instantly see page count, spine width, margins, cover dimensions, printing cost, and royalty. All specs on one page.
Use this toolBook Font Preview
See how fonts actually look on a real book page. Browse 18+ curated font pairings for fiction, nonfiction, and poetry.
Use this toolFormatting Checklist
35 things to check before uploading your book to KDP or IngramSpark. Progress saves automatically.
Use this toolBook Spine Calculator
Enter your page count and paper type — see exact spine width and full cover dimensions for KDP and IngramSpark.
Use this toolBook Description Formatter
Format your Amazon book description with the HTML tags KDP actually accepts. Write, preview, and copy — no code needed.
Use this toolWord Count Tool
Paste your manuscript — see word count, page estimates by trim size, reading time, and how your length compares to genre standards.
Use this toolCover Size Calculator
Enter your trim size and page count — see full cover dimensions with bleed, spine, barcode zone, and pixel sizes at 300 DPI.
Use this toolThese tools help you prepare the book.
Cambric helps you finish it.
Use the calculators and checklists here. Then move the real workflow into the desktop app built to give you professional interiors on Windows or Mac.