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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.

KDP Official Measurements

1

Full Cover

Width (in)

10.588

Height (in)

8.25

2

Front Cover

Width (in)

5

Height (in)

8

3

Safe Area

Width (in)

4.875

Height (in)

7.75

4

Bleed

Width (in)

0.125

Height (in)

0.125

5

Margin

Width (in)

0.125

Height (in)

0.125

6

Spine

Width (in)

0.338

Height (in)

8

7

Spine Safe Area

Width (in)

0.213

Height (in)

7.75

8

Spine Margin

Width (in)

0.062

Height (in)

0.062

9

Barcode Margin

Width (in)

0.25

Height (in)

0.25

#DescriptionWidth (in)Height (in)
1Full Cover10.5888.25
2Front Cover58
3Safe Area4.8757.75
4Bleed0.1250.125
5Margin0.1250.125
#DescriptionWidth (in)Height (in)
6Spine0.3388
7Spine Safe Area0.2137.75
8Spine Margin0.0620.062
9Barcode Margin0.250.25

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.
Create a Full KDP Cover

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, Converter, or Generator?

A KDP template is useful when you want a guide layer for Canva, Photoshop, InDesign, or another design tool. If you already have a front cover, use the converter to build the paperback wrap. If the cover itself needs to be made, use the generator.

Use a KDP template when you design manually

Best if you already work in a design app and want to place every element yourself.

  1. 1Calculate the book specsStart with the final trim size, page count, paper type, and cover format.
  2. 2Download the official guide layerUse KDP's PDF or PNG template to see bleed, safe areas, spine, and barcode placement.
  3. 3Place the artworkFit the front cover, build the back cover, and keep spine text inside the safe area.
  4. 4Export one full PDFRemove the guide layer before exporting the final wraparound cover file.

Use the converter when you already have a front cover

Best if you like the ebook, Canva, AI, or designer cover and need to turn it into a KDP paperback full cover.

  1. 1Upload the front coverStart with your existing ebook, Canva, AI, or designer front cover image.
  2. 2Use the same specsChoose trim size, page count, paper type, and paperback or hardcover settings.
  3. 3Add the missing print partsBuild the back cover, spine, bleed, and barcode-safe layout around the front cover.
  4. 4Export one KDP fileCreate a full cover PDF sized for the selected KDP print dimensions.
Convert an Existing Front Cover

Use the generator when the cover itself needs work

Best if you need a new front cover or want a cleaner KDP cover draft instead of preserving the existing design.

  1. 1Use the same specsChoose the same trim size, page count, paper type, and format.
  2. 2Create a front coverGenerate a new KDP cover direction with AI before building the print layout.
  3. 3Add spine and back coverAdd spine text, back cover copy, and barcode-safe layout.
  4. 4Export for KDPCreate a full cover file sized around the selected KDP print dimensions.
Generate a New KDP Cover

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 SizeCommon FormatTypical UseNotes
5 x 8PaperbackCompact fiction and short nonfictionSmaller trim size, often used when portability matters more than large typography.
5.5 x 8.5Paperback / HardcoverTrade books and many self-published titlesA flexible mid-size option when you want more room than 5 x 8 without moving to 6 x 9.
6 x 9Paperback / HardcoverStandard nonfiction and many KDP print booksOne of the most common KDP trim sizes because it balances readability, page count, and production familiarity.
8.5 x 11PaperbackWorkbooks, manuals, and image-heavy interiorsUseful when the interior needs more horizontal space for diagrams, recipes, or worksheets.

What does a 6 x 9 KDP hardcover full cover PDF include?

A 6 x 9 hardcover is not uploaded as a 6 x 9 image. For this 100-page white-paper example, the full cover PDF is 13.989 x 10.417 in because KDP adds hardcover wrap, board allowance, spine, and hinge areas around the finished book.

6 x 9 • 100 pages • hardcover • white paper

Full cover PDF

13.989 x 10.417 in

The complete PDF you upload to KDP for the hardcover case.

This is where the 10.417 in height appears for 6 x 9 hardcover covers.

Front and back cover panels

6.197 x 9.236 in

The printable front and back cover panel size before the wrap area folds around the board.

The finished trim is still 6 x 9; the panel includes board allowance.

Spine

0.414 x 9.236 in

The hardcover spine width for this page count and paper type.

Page count changes this width, so recalculate after manuscript edits.

Wrap

0.591 x 0.591 in

Extra artwork that wraps around the hardcover boards.

Keep important text out of the wrap because it folds out of view.

Hinge area

0.394 x 10.417 in

The flexible area between each cover panel and the spine.

Avoid placing titles or key artwork across the hinge.

PartSizeMeaningNote
Full cover PDF13.989 x 10.417 inThe complete PDF you upload to KDP for the hardcover case.This is where the 10.417 in height appears for 6 x 9 hardcover covers.
Front and back cover panels6.197 x 9.236 inThe printable front and back cover panel size before the wrap area folds around the board.The finished trim is still 6 x 9; the panel includes board allowance.
Spine0.414 x 9.236 inThe hardcover spine width for this page count and paper type.Page count changes this width, so recalculate after manuscript edits.
Wrap0.591 x 0.591 inExtra artwork that wraps around the hardcover boards.Keep important text out of the wrap because it folds out of view.
Hinge area0.394 x 10.417 inThe flexible area between each cover panel and the spine.Avoid placing titles or key artwork across the hinge.

What does a 6 x 9 KDP paperback full cover PDF include?

A 6 x 9 paperback full cover PDF is one wraparound file: back cover, spine, front cover, and bleed. For this 100-page white-paper example, the full cover PDF is 12.475 x 9.250 in, while each finished cover panel stays 6 x 9.

6 x 9 • 100 pages • paperback • white paper

Full cover PDF

12.475 x 9.250 in

The single PDF that contains the back cover, spine, front cover, and bleed.

Paperback height is 9.250 in for a 6 x 9 book because of top and bottom bleed.

Front and back cover panels

6.000 x 9.000 in

The finished front and back cover size after trimming.

Each cover panel remains 6 x 9 even though the full PDF is wider and taller.

Spine

0.225 x 9.000 in

The paperback spine width for this page count and paper type.

For KDP paperbacks, books under 79 pages should avoid spine text.

Bleed

0.125 x 0.125 in

Extra artwork beyond the trim edge to prevent white borders.

Backgrounds should extend through this area.

Safe area

5.875 x 8.750 in

The safer area for text and important graphics on each cover panel.

Keep text inside this space to reduce trim and shift risk.

PartSizeMeaningNote
Full cover PDF12.475 x 9.250 inThe single PDF that contains the back cover, spine, front cover, and bleed.Paperback height is 9.250 in for a 6 x 9 book because of top and bottom bleed.
Front and back cover panels6.000 x 9.000 inThe finished front and back cover size after trimming.Each cover panel remains 6 x 9 even though the full PDF is wider and taller.
Spine0.225 x 9.000 inThe paperback spine width for this page count and paper type.For KDP paperbacks, books under 79 pages should avoid spine text.
Bleed0.125 x 0.125 inExtra artwork beyond the trim edge to prevent white borders.Backgrounds should extend through this area.
Safe area5.875 x 8.750 inThe safer area for text and important graphics on each cover panel.Keep text inside this space to reduce trim and shift risk.

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.

Create a Full KDP Cover
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