Live Tool
KDP Smart Formatter
Professional formatting tools for Amazon KDP Paperback & eBook — all in one place.
or click to browse — PDF files only
✅ Your file is ready!
KDP-compliant formatted PDF — ready to upload to Amazon KDP.
JPG or PNG — min 1000×625px
Amazon KDP: 1000px–10000px range. Optimized for 1:1.6 ratio.
✅ Cover is ready!
KDP-compliant cover image — ready to upload to Amazon KDP.
We’ll convert it to Kindle-ready HTML
✅ Kindle file ready!
Upload this HTML directly to KDP or convert to EPUB via Calibre (free).
Calculate your Amazon KDP earnings for both 35% and 70% royalty plans. Ranked for keyword: amazon book sales calculator.
- 70% royalty requires list price between $2.99–$9.99 for eBooks.
- Paperbacks only qualify for 60% royalty minus printing cost.
- Price between $9.99–$14.99 tends to maximize paperback revenue.
- eBooks priced at $2.99–$4.99 often get the most volume × revenue.
- Enable KDP Select for Kindle Unlimited page-read income.
- Fiction novels: $12.99–$16.99
- Non-fiction: $14.99–$24.99
- Short books (<100 pages): $7.99–$11.99
- Kindle eBook: $2.99–$4.99 sweet spot
- Children’s books: $8.99–$14.99
Calculate the exact spine width for your KDP paperback cover. Essential before designing your full wrap cover. Keyword: spine width calculator, book spine calculator.
- Spine text only readable on books with 100+ pages (approx 0.25″ width).
- Add 0.0625″ safety margin on each side of spine text.
- KDP adds bleed — design canvas should be 0.125″ larger on each edge.
- Use KDP’s Cover Calculator tool to double-check your measurements.
- Cream paper produces a slightly thicker spine than white paper.
- 100 pages: ~0.23″ (no text)
- 200 pages: ~0.45″ (tight text)
- 300 pages: ~0.68″ (good)
- 400 pages: ~0.90″ (comfortable)
- 500 pages: ~1.13″ (spacious)
One of the most searched KDP questions: “white vs cream paper” (3,600 searches/month, KD only 6). Click your book genre below to get a recommendation.
White Paper
Bright, high-contrast. Best for books with images, charts, or technical content.
Cream Paper
Warm, easy on eyes. Traditional book feel. Best for long fiction reads.
✅ Recommended: Cream Paper
For fiction novels, cream paper is the industry standard. It reduces eye strain during long reading sessions and gives your book a professional, traditional feel that readers expect.
• Cream paper: 0.0025″ per page
• 300-page book: White = 0.68″ spine, Cream = 0.75″ spine
• Difference: ~10% thicker with cream paper
Complete reference for all Amazon KDP supported trim sizes. Targeting: standard book sizes (1,300 searches/month, KD 29), book dimensions, average book size.
| Trim Size | Inches | CM | Best For | Popularity |
|---|---|---|---|---|
| 6″ × 9″Most Popular | 6 × 9 in | 15.24 × 22.86 | Novels, Non-fiction | ⭐⭐⭐⭐⭐ |
| 5.5″ × 8.5″Popular | 5.5 × 8.5 in | 13.97 × 21.59 | Trade paperback | ⭐⭐⭐⭐ |
| 5″ × 8″ | 5 × 8 in | 12.7 × 20.32 | Compact novels | ⭐⭐⭐ |
| 5.06″ × 7.81″ | 5.06 × 7.81 in | 12.85 × 19.84 | Mass market paperback | ⭐⭐⭐ |
| 7″ × 10″Non-fiction | 7 × 10 in | 17.78 × 25.4 | Non-fiction, guides | ⭐⭐⭐⭐ |
| 8.5″ × 11″ | 8.5 × 11 in | 21.59 × 27.94 | Workbooks, textbooks | ⭐⭐⭐ |
| 8″ × 10″Children’s | 8 × 10 in | 20.32 × 25.4 | Children’s books | ⭐⭐⭐⭐⭐ |
| 8.5″ × 8.5″ | 8.5 × 8.5 in | 21.59 × 21.59 | Picture books, square | ⭐⭐⭐ |
| 4.25″ × 6.87″ | 4.25 × 6.87 in | 10.8 × 17.46 | Pocket books | ⭐⭐ |
| 6.14″ × 9.21″ | 6.14 × 9.21 in | 15.6 × 23.39 | US Trade standard | ⭐⭐⭐ |
✅ Recommended: 6″ × 9″
The industry standard for fiction novels. Most readers expect this size, it fits perfectly on bookshelves, and it’s the most popular size on Amazon KDP with the lowest printing cost per page.
- 6″×9″ has the lowest printing cost — maximizes your royalty.
- Children’s books need larger sizes (8″×10″) for illustrations.
- Workbooks use 8.5″×11″ so readers have writing space.
- Avoid unusual sizes — readers find standard sizes more trustworthy.
- Once chosen, your trim size is hard to change after publishing.
Targeting: epub vs mobi (1,000 searches/mo, KD 17), kindle format in epub (590 vol, KD 14) — both low competition, high intent keywords.
🏆 Verdict: Use EPUB for KDP
Amazon KDP now recommends EPUB over MOBI. EPUB works on all platforms, while MOBI is Amazon-only. Upload EPUB to KDP — Amazon converts it to their internal KFX format automatically.
- Amazon deprecated MOBI in 2022 — EPUB is the new standard.
- Use our Kindle formatter to generate KDP-ready HTML first.
- Convert HTML → EPUB using free Calibre software.
- Validate your EPUB at epubcheck.org before upload.
- KDP converts your EPUB to KFX (Kindle Format X) automatically.
✅ Asset Formatted
KDP-ready file generated per Amazon’s latest guidelines.
- Always preview your interior in KDP Print Previewer before publishing.
- Embed all fonts in your PDF before uploading to KDP.
- Use 300 DPI images for best print quality.
- 6″×9″ is the best-selling trim size for novels on Amazon.
- Add 0.125″ bleed if any images touch the page edges.