KDP Paperback Cover Size Calculator
Enter final trim size, final page count and paper/interior type to calculate the full cover, spine, pixels and current spine-text eligibility in one place.
Calculate, check and prepare the full cover
Enter the final trim size, final interior page count and KDP paper/interior type. The workspace returns the spine, full cover dimensions, raster pixels, spine-text status and optional mismatch check.
Waiting for real job values
Enter trim size and final page count.
Use the final interior before sizing the cover
KDP paperback cover width depends on trim width, paper/interior type and final page count because the page count controls spine width. The cover also includes 0.125 in bleed on the two outer sides and top/bottom. Books below 79 pages should not include printed spine text.
- Finalize the interior.Export or format the interior first so the page count is stable.
- Choose the exact trim and paper type.Changing either can change the cover or spine requirement.
- Calculate the full cover.Use the workspace for full dimensions, spine, pixels and mismatch checking.
- Compare with KDP's current template.Use the official cover calculator/template as the final provider-controlled check.
What the result is useful for
Use this after the interior is final: one workspace connects trim size, page count and paper type to the spine, full spread, raster dimensions, spine-text rule and an optional check against an existing cover file size.
How the calculation works
Full paperback cover width = 2 × trim width + spine + 0.25 in total outside bleed; height = trim height + 0.25 in.
What this calculator cannot know
KDP controls the final acceptance rules. Recheck Amazon’s current cover template/calculator after the interior is final, especially after any page-count or trim-size change.