Free KDP Cover Size Calculator
Enter your trim size, page count, paper type, and cover format to calculate the full wraparound cover size for KDP. Get spine width, front and back cover size, 300 DPI pixels, and a clear next step for your print cover.
Your Cover Dimensions
Full Cover Size
10.588 x 8.250 in
Front Cover Size
5.125 x 8.250 in
Back Cover Size
5.125 x 8.250 in
Spine Width
0.338 in
Full Cover Pixels
3176 x 2475 px
Before You Export
- Include 0.125 in bleed on the outer edges for paperback covers.
- Keep text at least 0.25 in inside the trim line.
- Reserve barcode space on the lower-right back cover area.
- Keep spine text centered with enough margin on both sides.
What Your Result Includes
Use these measurements before you design, check, or export a KDP print cover.
Full Cover Size
The total width and height for one wraparound KDP cover file, including back cover, spine, front cover, and bleed.
Front and Back Cover Size
The panel size for each cover side, useful when checking artwork placement and image fit.
Spine Width
The spine changes when page count, paper type, or format changes. Recalculate it after manuscript edits.
300 DPI Pixel Size
A print-resolution pixel reference for checking whether your full cover canvas is large enough.
Built for KDP Print Covers
This calculator focuses on KDP paperback and hardcover covers. It is not a general ebook cover guide and does not replace KDP's official template, but it helps you understand the same dimensions before you design or generate a full cover.
Paperback
Calculate full cover size, spine width, bleed, and front/back panel dimensions for KDP paperbacks.
Hardcover
Calculate hardcover dimensions with the different wrap and board compensation KDP requires.
Scope
Use this for print cover sizing. Kindle ebook covers are front-cover images and follow a different workflow.
KDP Template or Full Cover Generator?
A KDP template is useful when you want a guide layer for Canva, Photoshop, InDesign, or another design tool. If you want to finish the cover here, use the same specs in the generator to build the front cover, spine, back cover, and export file.
Use a KDP template when you design manually
Best if you already work in a design app and want to place every element yourself.
- 1Calculate the book specsStart with the final trim size, page count, paper type, and cover format.
- 2Download the official guide layerUse KDP's PDF or PNG template to see bleed, safe areas, spine, and barcode placement.
- 3Place the artworkFit the front cover, build the back cover, and keep spine text inside the safe area.
- 4Export one full PDFRemove the guide layer before exporting the final wraparound cover file.
Use the generator when you want the full cover built for you
Best if you want to turn a front cover and book specs into a complete KDP cover without laying out a blank template by hand.
- 1Use the same specsChoose the same trim size, page count, paper type, and format.
- 2Start with a front coverUpload an existing front cover or create a new one with AI.
- 3Add spine and back coverAdd spine text, back cover copy, and barcode-safe layout.
- 4Export for KDPCreate a full cover file sized around the selected KDP print dimensions.
What Changes Your KDP Cover Dimensions
KDP print covers are not one fixed image size. Format, trim size, page count, paper type, bleed, spine width, and barcode-safe space all affect the final file.
Trim Size
5 x 8 to 8.5 x 11 in
The finished book size after cutting. Common KDP sizes include 5 x 8, 5.5 x 8.5, 6 x 9, and 8.5 x 11.
Full Cover
Back + spine + front
The print upload is a single wraparound cover, not separate front and back images.
Spine Width
Page count x paper thickness
Spine width changes whenever the page count or paper type changes, so it must be recalculated after manuscript edits.
Bleed
0.125 in
Background artwork should extend beyond the trim edge so cutting does not leave white borders.
Safe Zone
About 0.25 in inside trim
Keep titles, author names, and important graphics away from trim edges and spine folds.
Barcode Area
Lower-right back cover
If KDP adds the barcode, the back cover should keep that area clear.
Print Export
300 DPI PDF
KDP print covers should be exported as one high-resolution PDF after the full cover is built.
Popular KDP Trim Sizes
These sizes are common starting points for KDP print books. The best choice depends on your genre, reading experience, and production goals.
| Trim Size | Common Format | Typical Use | Notes |
|---|---|---|---|
| 5 x 8 | Paperback | Compact fiction and short nonfiction | Smaller trim size, often used when portability matters more than large typography. |
| 5.5 x 8.5 | Paperback / Hardcover | Trade books and many self-published titles | A flexible mid-size option when you want more room than 5 x 8 without moving to 6 x 9. |
| 6 x 9 | Paperback / Hardcover | Standard nonfiction and many KDP print books | One of the most common KDP trim sizes because it balances readability, page count, and production familiarity. |
| 8.5 x 11 | Paperback | Workbooks, manuals, and image-heavy interiors | Useful when the interior needs more horizontal space for diagrams, recipes, or worksheets. |
Example Calculations
These examples show how the same calculator logic changes when you change the format, trim size, page count, or paper type.
Example 1: 6 x 9 paperback
6 x 9 • 200 pages • paperback • white paper
- Spine Width
- 0.450 in
- Full Cover Size
- 12.700 x 9.250 in
- Front Cover Pixels
- 1838 x 2775 px
Example 2: 5.5 x 8.5 paperback
5.5 x 8.5 • 320 pages • paperback • cream paper
- Spine Width
- 0.800 in
- Full Cover Size
- 12.050 x 8.750 in
- Front Cover Pixels
- 1688 x 2625 px
Example 3: 6 x 9 hardcover
6 x 9 • 180 pages • hardcover • white paper
- Spine Width
- 0.594 in
- Full Cover Size
- 14.169 x 10.417 in
- Front Cover Pixels
- 2036 x 3125 px
Before You Upload to KDP
Use these checks after you calculate the size and before you export. If you continue in the generator, the layout applies bleed, spine, and barcode-safe spacing so you do not have to place them by hand.
Bleed
Paperback covers need 0.125 in bleed on all outer edges. Keep backgrounds extended so trim lines do not reveal white borders.
Safe Zone
Keep titles, author names, and important elements at least 0.25 in inside the trim line to avoid cutting or shifting.
Export
Use a 300 DPI PDF for print-ready files. Leave barcode space on the back cover and verify the final spine width before upload.
Spine Text
Avoid spine text on very thin books. For KDP paperbacks, books under 79 pages should not include text on the spine.
Common KDP Size Mistakes
Most size-related upload problems come from a small number of avoidable mistakes. These are the ones worth checking before export.
Using an Old Page Count
If your interior changed, your spine changed too. Reusing an old cover after editing the manuscript is one of the fastest ways to get the wrong file size.
Picking the Wrong Trim Size
A 5.5 x 8.5 file cannot be reused as 6 x 9 without recalculating the entire cover size. Trim size errors affect every exported dimension.
Forgetting Bleed
Designing to trim size only can leave white edges after printing. Bleed must be added to the final printable canvas.
Treating Hardcover Like Paperback
Hardcover math includes wrap and board compensation. If you use paperback logic for hardcover, your final file width will be wrong.
Frequently Asked Questions
What size should my KDP cover be?
There is no single fixed size. Your KDP cover size depends on trim size, page count, paper type, and whether the book is paperback or hardcover.
Do I still need a KDP cover template?
Use a template if you plan to design the full cover manually in another app. If you want to build the full cover here, use the calculated specs in the KDP cover generator instead.
Why does page count change my cover size?
Page count changes the spine width. When the spine changes, the total full cover width changes too, so you should recalculate before export.
Turn these dimensions into a full KDP cover
After you confirm the right size, continue to the KDP cover generator to build the front, spine, back cover, and export file.