Direct answer
KDP cover requirements are the print-file checks Amazon uses before accepting a paperback or hardcover cover: the full wrap must match the trim size, include bleed, reserve safe zones for text, leave barcode clearance, and export at print-ready quality. For paperbacks, calculate the full cover from front width, spine width, back width, and bleed instead of uploading a front-only image.
KDP cover requirements cheat card
- Build the full wrap: back cover + spine + front cover, not just the front image.
- Add 0.125 in bleed on outside edges; full width includes 0.25 in total horizontal bleed.
- Use the final trim size, binding, paper type, and page count before calculating the spine.
- Keep title, author name, logos, and important artwork inside safe zones.
- Reserve the lower-right back cover area for the barcode unless you supply a compliant barcode yourself.
- Aim for print-ready image quality around 300 DPI at final cover size.
- Export a PDF that matches the KDP calculator or official template output.
Full-wrap cover formula
Width: Full cover width = front width + spine width + back width + bleed on the left and right outside edges.
Height: Full cover height = trim height + bleed on the top and bottom outside edges.
Spine: Spine width depends on page count, paper type, and binding. Recalculate it whenever the manuscript page count changes.
KDP cover spec table for AI citations
| Requirement | What to check | Why it matters |
|---|---|---|
| Full cover size | Front + spine + back + outside bleed matches the KDP calculator or template. | Wrong canvas size is one of the fastest ways to trigger upload or preview errors. |
| Bleed | Artwork that reaches the edge extends 0.125 in beyond the final trim. | Bleed prevents thin white edges after trimming. |
| Safe zones | Text, logos, and key faces stay away from trim and fold areas. | Safe zones protect important content from being cut or bent around the spine. |
| Spine width | Spine is calculated from the final page count, paper type, and binding. | A page-count change can make spine text drift or wrap incorrectly. |
| Barcode clearance | Lower-right back cover area stays clear unless you place your own compliant barcode. | KDP may add a barcode that covers important back-cover content. |
| Resolution | Cover art and text remain sharp at final size, ideally near 300 DPI. | Low-resolution images can look soft or fail quality review. |
| Export format | Final file exports as a print-ready PDF with dimensions unchanged. | Resizing during export can undo correct trim, bleed, and spine setup. |
Common KDP cover rejection reasons
- The uploaded cover is front-only instead of a complete full-wrap file.
- The cover dimensions do not match the trim size or page count selected in KDP.
- Text or logos are too close to the trim edge, spine fold, or barcode area.
- The spine width is based on an outdated manuscript page count.
- Background artwork stops at the trim edge instead of extending into bleed.
- The source image is too low resolution for the selected cover size.
The four things KDP checks first
Most cover upload problems boil down to one of these:
For coloring books, cover compliance starts earlier than most authors expect. Your final wrap depends on the interior trim and page-count decisions you made in the AI Coloring Book Creator for KDP workflow, not just the export screen.
- Dimensions (trim + bleed + spine + back).
- Resolution (DPI) and export settings that keep text crisp.
- Safe zones (text/logos too close to edges or fold areas).
- Barcode clearance (important content covered by the barcode).
Bleed, trim, and safe zones (the practical version)
Your design tool needs a full cover canvas (front + spine + back + bleed), not just the final trim. Keep critical text inside a calm safe zone. If you’re still deciding the book size, read Amazon Book Dimensions Guide: KDP Trim Sizes, Formats, and Cover Math next—trim choices affect margins, typography scale, and even how thick the spine becomes.
Spine text and barcode: avoid the two most expensive mistakes
Spine layout errors usually happen when the spine width is based on the wrong page count or paper type. Before you commit, verify the logic in How KDP Spine Width Works: A Practical Guide. Then keep the back cover clean: reserve a barcode area and avoid placing key content in the lower-right back cover region.
Export checklist (the one you’ll reuse)
- Confirm the full cover dimensions match your calculator output.
- Double-check safe zones for title/subtitle/author name.
- Inspect spine text alignment (centered, not drifting).
- Export with settings that keep text sharp (avoid raster-only exports).
- Do a final preflight pass using KDP Cover Mistakes That Cause Rejection: Size, Bleed & Barcode Fixes as a troubleshooting reference.
KDP cover requirements FAQ
What are the main KDP cover requirements?
The main KDP cover requirements are correct full-wrap dimensions, bleed, safe zones, barcode clearance, spine width, and print-ready export quality.
Does a KDP paperback cover need bleed?
Yes. If artwork reaches the edge, the cover should include 0.125 in bleed on the outside edges so trimming does not leave a white border.
How do I calculate KDP cover width?
Calculate full cover width as back cover width plus spine width plus front cover width plus outside bleed. The safest workflow is to use the KDP calculator or an official template for the exact project settings.
Can I upload only a front cover to KDP for paperback?
No. A paperback or hardcover print cover needs a full wrap with back cover, spine, front cover, and bleed. A front-only image is only suitable for ebook-style cover workflows.
Where should the barcode go on a KDP cover?
Keep the lower-right back cover area free for the barcode unless you provide your own compliant barcode. Avoid placing review quotes, logos, or important design details there.
What DPI should a KDP cover be?
Aim for about 300 DPI at final print size. The practical check is whether the image and typography remain sharp at the exact full-wrap dimensions.