Free — No Signup Required

Spine width, cover size, print cost, fonts, formatting.
All the specs. All free.

Seven tools that handle the math and checklists between "manuscript done" and "uploaded to KDP." Built by the team behind Cambric, the desktop book formatting app.

Calculators

Get the numbers right

Page count, spine width, cover dimensions, printing cost — the specs your cover designer needs and your platform requires. Enter your book details, get exact numbers.

The all-in-one spec sheet

KDP Book Calculator

Enter your word count and get page count, spine width, margins, cover dimensions, printing cost, and royalty — all on one page. The numbers every indie author needs before uploading.

Calculate specs
Spine width + cover dimensions

Book Spine Calculator

Enter page count and paper type — get exact spine width for KDP and IngramSpark, plus full cover dimensions with bleed. Shows whether your spine can hold text.

Calculate spine
Full cover specs for your designer

Cover Size Calculator

Enter trim size and page count — see full cover dimensions with bleed, spine, barcode zone, safe area, and pixel sizes at 300 DPI. Copy specs or send directly to your designer.

Calculate cover
Words → estimated pages

Word Count Tool

Paste your manuscript — see word count, estimated page count across five trim sizes, reading time, and how your length compares to genre standards.

Count words
Formatting & Prep

Make the right decisions

Font selection, description formatting, and the 35-point quality check. The decisions and verifications between "manuscript done" and "upload ready."

See fonts on a real page

Book Font Preview

Preview 18+ book fonts in a realistic page layout. Filter by genre, adjust trim size and font size, compare pairings side by side. The font research step before formatting.

Preview fonts
KDP-ready HTML in seconds

Book Description Formatter

Write or paste your book description, add bold, italic, headings, and bullet points — get clean HTML that Amazon KDP actually accepts. Preview before you paste.

Format description
35 items before you upload

Formatting Checklist

Every formatting requirement for KDP and IngramSpark in one interactive checklist. Check items off as you go — progress saves automatically in your browser.

Start checklist
The Full Picture

Everything between “manuscript done”
and “uploaded to KDP”

These tools cover the research. Here’s the rest of the workflow.

  1. 1

    Choose trim size, paper type, fonts

    Our calculators and font preview help here

  2. 2

    Calculate spine width and cover dimensions

    Spine and cover calculators handle this

  3. 3

    Set up page layout — margins, headers, page numbers

    Different for every trim size. KDP has minimum margin requirements.

  4. 4

    Build front matter — title page, copyright, dedication, TOC

    Each page has its own layout conventions. Recto/verso placement matters.

  5. 5

    Format chapter openings — drop caps, ornaments, spacing

    Consistent across 20–40 chapters. One mistake and it looks amateur.

  6. 6

    Handle widows, orphans, and bad page breaks

    Manual page-by-page review. Changes cascade — fixing one can create another.

  7. 7

    Export a print-ready PDF with correct bleed and color profile

    PDF/X-1a for print. Wrong export settings = rejected upload.

  8. 8

    Create the EPUB for ebook distribution

    Completely separate file with its own formatting rules.

  9. 9

    Verify against platform requirements and upload

    Our formatting checklist covers this

Most authors spend 8–15 hours on steps 3–8 per book — or pay a formatter $200–$500 each time. And every edit to the manuscript means redoing the specs.

Or, Skip to Step 9

Import your manuscript. Pick a template.
Export a print-ready book.

Cambric is a desktop app that handles steps 3–8 automatically. Professional book interiors, your files, your machine. One-time purchase.

Format your first book — $199

One-time purchase · macOS & Windows · No subscription, no cloud, no lock-in