KDP Book Size Calculator: Trim, Spine & Bleed (2026)
Use this KDP book size calculator to get trim size, spine width, bleed, and full cover dimensions in seconds, then open a Canva-ready template for export.
最后更新：2025-12-27
Pre-sized canvas. No manual setup required.
Use the KDP book size calculator
Results
Spine
0.450"
11.43 mm
Width
12.700"
322.58 mm
Height
9.250"
234.95 mm
| Bleed | 0.125 in |
| Safe zone | 0.125 in |
25.4 mm = 1 in
6 × 9 KDP Book Size Calculator Examples (Paperback)
A widely used trade trim across genres. Below are precomputed sizes from our KDP book size calculator, including bleed.
| Paper (B&W) | Pages | Spine (in) | Full width (in) | Full height (in) |
|---|---|---|---|---|
| White | 100 | 0.225 | 12.475 | 9.250 |
| White | 120 | 0.270 | 12.520 | 9.250 |
| White | 200 | 0.450 | 12.700 | 9.250 |
| White | 300 | 0.676 | 12.926 | 9.250 |
| Cream | 100 | 0.250 | 12.500 | 9.250 |
| Cream | 120 | 0.300 | 12.550 | 9.250 |
| Cream | 200 | 0.500 | 12.750 | 9.250 |
| Cream | 300 | 0.750 | 13.000 | 9.250 |
Full width and height include bleed. For hardcover, dimensions are larger due to wrap and hinge; use the calculator above.
5 × 8 KDP Book Size Calculator Examples (Paperback)
A classic compact trim often used for fiction and poetry. Below are precomputed sizes including bleed.
| Paper (B&W) | Pages | Spine (in) | Full width (in) | Full height (in) |
|---|---|---|---|---|
| White | 100 | 0.225 | 10.475 | 8.250 |
| White | 120 | 0.270 | 10.520 | 8.250 |
| White | 200 | 0.450 | 10.700 | 8.250 |
| White | 300 | 0.676 | 10.926 | 8.250 |
| Cream | 100 | 0.250 | 10.500 | 8.250 |
| Cream | 120 | 0.300 | 10.550 | 8.250 |
| Cream | 200 | 0.500 | 10.750 | 8.250 |
| Cream | 300 | 0.750 | 11.000 | 8.250 |
5.5 × 8.5 KDP Book Size Calculator Examples (Paperback)
Another popular trade size for both fiction and non‑fiction. Values below include bleed.
| Paper (B&W) | Pages | Spine (in) | Full width (in) | Full height (in) |
|---|---|---|---|---|
| White | 100 | 0.225 | 11.475 | 8.750 |
| White | 120 | 0.270 | 11.520 | 8.750 |
| White | 200 | 0.450 | 11.700 | 8.750 |
| White | 300 | 0.676 | 11.926 | 8.750 |
| Cream | 100 | 0.250 | 11.500 | 8.750 |
| Cream | 120 | 0.300 | 11.550 | 8.750 |
| Cream | 200 | 0.500 | 11.750 | 8.750 |
| Cream | 300 | 0.750 | 12.000 | 8.750 |
How do I set up Photoshop / Canva for KDP covers?
Photoshop
- • Units: Inches; Resolution: 300 DPI
- • Color Mode: CMYK for print preview
- • Canvas Size: Use Full Width × Full Height from the calculator
- • Export: PDF/X-1a:2001 or High Quality Print
Canva
- • Create Design > Custom Size: Enter Inches
- • Width/Height: Use Full Width / Full Height values
- • Keep critical text/logos inside the Safe Zone
- • Download: PDF Print (select "Crop marks and bleed")
How to use the KDP Book Size Calculator
Confirm the final page count (any even number between 24–1000); this determines the spine width.
Choose cover type (paperback/hardcover), paper type and trim size.
Review the inch/mm output and double-check bleed and safe zone.
点击“在 KDP 封面制作器中打开此尺寸（免费）”，即可在线设计封面。
Why size errors are the #1 KDP rejection
KDP checks dimensions first. Using a precise KDP book size calculator is critical. If trim, spine, bleed, or safe-zone values are off by as little as 0.1 in, files may be rejected or the print can shift.
KDP Cover Calculator Terminology: Dimensions, Bleed & Spine
| Term | Definition | Value |
|---|---|---|
| Bleed (paperback) | Extra area beyond trim to avoid white edges | 0.125 in |
| Safe zone | Keep text/logos inside this distance from trim | ≥ 0.125 in |
| Spine width | Pages × paper thickness (varies by stock) | dynamic |
| Hinge (hardcover) | Flexible zone next to spine | 0.394 in each side |
| Wrap / Turn‑in (hardcover) | Extra area that wraps around boards | 0.591 in each side/top/bottom |
Paperback vs Hardcover KDP Cover Size Differences
- • Paperback: width = 2 × trim width + spine + 2 × 0.125 in; height = trim height + 2 × 0.125 in.
- • Hardcover (case laminate): width = 2 × trim width + spine + 0.394 + 2 × 0.591; height = trim height + 0.236 + 2 × 0.591.
- • Spine width depends only on pages × paper thickness (white/cream/color).
Common KDP Cover Size Errors & Calculator Fixes
| Error | Cause | Fix |
|---|---|---|
| Incorrect trim size | Canvas not set to full width/height including bleed | Recreate the canvas with the calculator output (in/mm). |
| Spine text cutoff | Text outside spine safe zone or font too large | Reduce the font size or increase pages; keep text inside the safe zone. |
| White edge after trimming | Background doesn’t fill the bleed area | Extend artwork into the 0.125 in bleed on outer edges. |
| Blurry print | Effective resolution < 300 DPI at final size | Export a 300 DPI print‑ready PDF. |
KDP Book Size Calculator FAQ
Q1: How do I get the exact KDP cover size for my book?
Q3: Does the calculator include the required 0.125" bleed?
Q4: What is the difference between KDP Hardcover and Paperback dimensions?
Q2: Are these templates compatible with Canva?
Q7: Do I need to create an account to download my KDP template?
Q5: Why should I export my cover as a 300 DPI PDF?
Q6: Where should I leave space for the Amazon barcode?
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