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KDP publishing guide

KDP Cover Calculator: Get Your Paperback Wrap Size

Use an Amazon KDP cover calculator to estimate paperback cover and spine dimensions. Confirm trim size, page count, ink, paper, and bleed with the current template.

Published by KDP Maker

Last reviewed: October 15, 2026. Verify requirements in Amazon KDP before publishing.

Need the paperback dimensions?

Our KDP paperback size calculator compares common trim and paper options, interior PDF size, cover wrap, spine, and minimum margins. For Amazon's current cover template, confirm the final settings with its official calculator before preparing artwork.

What a KDP cover calculator needs

An Amazon KDP cover calculator estimates the dimensions of a paperback's full-wrap cover. The wrap includes the back cover, spine, and front cover. Its size depends on the print choices and the finished interior, so gather these details first:

  • Trim size: the final width and height of the printed pages.
  • Interior ink and paper: select the same print options you will choose for the book.
  • Final page count: calculate it from the completed interior, including any intentional blank pages.
  • Book type and reading direction: choose the matching paperback and page-turn options shown in KDP's calculator.

How to use the Amazon KDP cover calculator

  1. Finish the interior and confirm its trim size and final page count.
  2. Open Amazon's cover calculator and select the matching binding, ink, paper, trim, and page count.
  3. Download the generated cover template. Use its trim, spine, bleed, and safe-area guides when laying out the back, spine, and front.
  4. Keep important text and artwork within the template's safe areas, and leave the designated barcode area clear.
  5. Upload the finished cover with the matching interior settings and inspect the full wrap in KDP Print Previewer.

If the page count or print options change, calculate a fresh template. Even a small change can affect the spine width and full-wrap dimensions.

The template marks the cover's bleed and safe areas. Follow those guides rather than estimating the extra edge area or spine width yourself.

Common paperback cover-size mistakes

  • Using the planned page count instead of the final interior page count.
  • Choosing a different paper or ink option in the calculator than in the KDP book setup.
  • Preparing a front-only image when the paperback needs a back, spine, and front wrap.
  • Stretching a cover template to fit instead of rebuilding the design for the newly calculated dimensions.
  • Treating a dimension match as proof that the artwork, barcode clearance, or final upload will pass review.

For separate file checks, use the Cover PDF Size Checker to compare a cover PDF's dimensions, and the KDP formatting checklist for the wider print-file review. These checks do not replace KDP's current template or Print Previewer.

Source: Amazon KDP Cover Calculator and KDP trim size, bleed, and margin guidance.