KDP Cover Size Calculator
Get the exact full wrap-around cover dimensions for your Amazon KDP book — back cover, spine, and front cover combined, plus bleed and pixel size at any DPI. Built on Amazon's official cover template formulas.
Book Details
Must be even. Min 24 pages.
Full Cover Dimensions
Full Wrap Cover (with bleed)
12.760" × 9.250"
3828 × 2775 px @ 300 DPI
Spine Width
0.5104"
153 px
Bleed / Wrap
0.125"
per side
Single Trim Page
6" × 9"
Keep text/logos 0.125" inside the trim edge (safe zone)
Spine is wide enough for spine text.
Anatomy of a KDP Wrap Cover
Back Cover
6"
Spine
0.51"
Front Cover
6"
Total: 12.760" × 9.250"
KDP wants a single PDF or PNG that covers the back, spine, and front in one flat image — including the 0.125" bleed that gets trimmed off. The barcode sits in the bottom-right of the back cover; leave that area free of important art.
Why Cover Dimensions Matter on KDP
Amazon KDP prints your cover as a single wrap-around file. If the canvas is even slightly off — wrong spine width, missing bleed, or the wrong trim — the upload is rejected or, worse, accepted with the spine art shifted onto the front cover. Getting the dimensions right before you design saves you re-exporting artwork over and over.
The full cover width is never just “twice the trim width.” It is two trim widths plus the spine (which grows with page count) plus bleed on every outer edge. A 200-page 6×9 paperback needs a canvas around 12.5” wide, not 12” — that extra half inch is the spine and bleed most first-timers forget.
Designing at 300 DPI is what keeps the printed cover crisp. A 12.5×9.25” cover at 300 DPI is roughly 3,750 × 2,775 pixels. Build smaller than that and the cover looks soft or pixelated in print.
How to Use This Calculator
- 1
Pick your binding and trim size
Choose paperback or hardcover, then the trim size you plan to publish. Hardcover supports a smaller set of trim sizes.
- 2
Enter your final page count
Use the real interior page count from your formatted manuscript — not your word count. The spine grows with every page.
- 3
Select your paper type
White, cream, or premium color. Cream is slightly thicker, so it widens the spine and the full cover.
- 4
Read off the full cover size
Use the full wrap dimensions (with bleed) as your design canvas. Copy the pixel size at 300 DPI straight into your design tool.
- 5
Keep art inside the safe zone
Hold titles and logos at least 0.125″ inside each trim edge, and leave the back-cover barcode area clear.
Common Cover Sizing Mistakes
Forgetting the bleed
Designing to the exact trim size leaves no bleed, so a sliver of white shows at the edges after trimming. Always add 0.125″ on every outer edge.
Using twice the trim width as the cover width
That ignores the spine entirely. The spine can add anywhere from 0.1″ to over an inch depending on page count.
Putting text on a too-thin spine
KDP only allows spine text at 79+ pages and a spine of at least 0.35″. Below that, any spine text gets rejected.
Designing below 300 DPI
A 72 DPI cover looks fine on screen but prints blurry. Always export your final cover at 300 DPI.
Ignoring the barcode zone
Amazon places a barcode in the lower-right of the back cover. Keep critical artwork and text out of that area.
Turn these measurements into a print-ready cover
KDP Builder takes you from this free tool to a complete, upload-ready package — manuscript or interior, cover, and metadata.
More Free KDP Tools
Keep prepping your book — every tool below is free and needs no signup.
Spine Width Calculator
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KDP Upload Checklist
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Book Description Generator
Write conversion-focused descriptions with Amazon HTML formatting included.
Related KDP Guides
Step-by-step formatting guides that pair with this tool.
Ready to Build the Whole Book?
Take it further with a complete, Amazon-ready project in KDP Builder.