KDP Publishing Guides
Amazon KDP Paperback Formatting: Everything You Need to Know
Formatting a KDP paperback is fundamentally different from ebook formatting. You are working with physical dimensions, binding gutters, bleed areas, and spine width formulas. Get it wrong and you will face upload errors, print rejections, or — worst of all — 1-star reviews mentioning your formatting. This guide covers every step from blank document to approved print file.
34%
of 1-star reviews specifically mention print formatting errors
+0.4★
higher average review rating for professionally formatted paperbacks vs. DIY-formatted
Choose Your Trim Size
The trim size is the final physical size of your printed book. KDP supports a range of standard sizes. Your genre and page count should guide this decision:
| Trim Size | Best For | Notes |
|---|---|---|
| 6 × 9 in | Fiction, non-fiction, most genres | Most common; looks professional |
| 5.5 × 8.5 in | Smaller novels, novellas | Slightly more compact feel |
| 8.5 × 11 in | Workbooks, journals, activity books | Higher royalty due to page count reduction |
| 5 × 8 in | Pocket-sized fiction | Increases page count; affects spine |
Set Up Your Margins (Gutter)
Print margins are more complex than ebook margins because the inside edge of each page disappears into the binding. KDP requires a minimum gutter (inside margin) that increases with page count:
| Page Count | Min Inside Margin | Recommended |
|---|---|---|
| 24–150 pages | 0.375 in | 0.5 in |
| 151–300 pages | 0.75 in | 0.875 in |
| 301–500 pages | 0.875 in | 1.0 in |
| 500+ pages | 1.0 in | 1.125 in |
Outside, top, and bottom margins can typically be 0.5–0.75 in. Add bleed (0.125 in on all sides) if your interior has elements that extend to the page edge.
Front Matter
Front matter appears before your main text. Standard front matter for a KDP paperback includes:
- •Title page — book title, subtitle, author name. Usually on the right-hand (recto) page.
- •Copyright page — copyright notice, ISBN, publisher name, disclaimer. Typically verso (left page).
- •Dedication — optional, right-hand page.
- •Table of contents — required for non-fiction, optional for fiction.
- •Epigraph or author's note — optional.
Body Text Formatting
The interior text is where most self-publishers make errors that show up in reader reviews. Follow these standards:
Typography
- Body text: 11–12pt, serif font
- Recommended fonts: Garamond, Palatino, Georgia, Minion Pro
- Line spacing: 1.2–1.5x (avoid double-spacing)
- Paragraph indent: 0.3–0.5 in (no extra line breaks between paragraphs)
Chapter Headings
- Always start on a new right-hand page (for novels)
- Use consistent heading style throughout
- Drop caps are optional but add polish
- Scene breaks: use *** or a decorative glyph, not just blank lines
Back Matter — Your Growth Engine
The back matter of your book is prime real estate. Readers who finish your book are your warmest audience. Use this space strategically:
- →About the Author — 2–3 paragraphs, first person. Include your website and social handles.
- →Other Books — list your catalog with short descriptions and buy links (for ebook version).
- →ARC Team / Review Invitation — invite readers to join your advance reader team. This is how you build a pipeline of reviewers for your next book. You can direct them to your iWrity profile page.
- →Reader Magnet — offer a free bonus (deleted scene, prequel short story) in exchange for an email signup.
The Full Wraparound Cover
The KDP paperback cover is a single PDF file containing the back cover, spine, and front cover laid out flat. The spine width depends on your page count and paper type:
// KDP spine width formula
White paper: page_count × 0.002252 inches
Cream paper: page_count × 0.0025 inches
// Example: 300-page novel on white paper
300 × 0.002252 = 0.6756 in spine width
Formatting Tools Compared
Vellum
Mac only — $249.99 one-time
The gold standard for fiction formatting. Beautiful output, fast, handles both ebook and print. Worth every dollar if you are on a Mac and publishing multiple books.
Atticus
Windows + Mac — $147 one-time
Browser-based app (works everywhere). Very similar feature set to Vellum. Slightly less polished output but improving rapidly. Best choice for Windows authors.
MS Word + KDP Template
Free with Office subscription
Download KDP's official Word templates for your trim size. Doable but time-consuming. Prone to formatting inconsistencies. Good starting point for first-time publishers on a tight budget.
Adobe InDesign
$22.99/month (Creative Cloud)
Professional typesetting tool. Highest control over output. Steep learning curve. Recommended only if you already use the Adobe suite or have a professional designer.
Common KDP Paperback Formatting Mistakes
Wrong bleed settings
Set bleed to 0.125 in on all sides in your PDF export settings. Missing bleed causes white edges on printed pages.
Spine too narrow for text
Calculate spine width accurately before designing. Text on spines under ~0.5 in is not allowed by KDP.
Not embedding fonts in the PDF
When exporting to PDF, always check 'embed fonts'. Missing fonts cause KDP to reject your upload.
Using RGB color profile instead of CMYK
Print uses CMYK. RGB colors (especially vibrant blues and oranges) shift significantly in CMYK print. Design covers in CMYK from the start.
Inconsistent chapter formatting
Use paragraph styles, not manual formatting. One click to update all chapter headings instead of fixing each one.
Great Formatting Deserves Great Reviews
A well-formatted book is table stakes. What turns a good book into a bestseller is social proof. iWrity connects your book with ARC readers who leave the verified reviews that drive sales.
Build Your ARC Review Team