KDP Cover Size Checker
Compare an entered paperback cover size with the KDP formula for trim, bleed and spine.
Enter your job values
Use the real values from your job. Optional fields can stay blank; zero should only be used when the value genuinely does not apply.
Your result will appear here
6 required values are still missing.
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
KDP Cover Size Checker converts book-production inputs into dimensions or cost values that can be checked against the publishing provider before upload.
How the calculation works
Expected KDP cover dimensions are calculated from trim, final page count and paper type, then compared with the actual cover dimensions.
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.