Free tools

KDP Cover Size Calculator

Estimate full-wrap paperback cover width and height from trim, page count, bleed and paper type.

How to use this estimate

Use the result for early planning, then verify it against the current specifications of your printer or distributor. Manufacturing tolerances, binding, bleed and marketplace pricing can change.

A KDP full-wrap paperback cover width equals back cover + spine + front cover + bleed. Height equals trim height plus bleed (typically 0.125 in on top and bottom). For a 6×9 trim with 300 pages on white paper, expect roughly 12.6 in wide by 9.25 in tall including bleed. Use this calculator before sending specs to a designer.

Key takeaways

  • Full-wrap cover = back + spine + front + bleed extension
  • Spine comes from page count — use the spine calculator first
  • Trim size changes invalidate existing cover templates
  • Verify final dimensions in KDP cover creator or your designer's proof

KDP cover size explained

Unlike ebook covers (one front JPEG), paperback covers wrap around the entire book block. KDP expects a single PDF or image at exact dimensions. Common mistakes:

  • Using front-only dimensions for a full-wrap upload
  • Spine text designed for the wrong page count
  • Forgetting 0.125 in bleed on outside edges
  • Changing trim after cover art is finished

How bleed affects cover height and width

Bleed is extra artwork beyond the trim line so manufacturing variance does not leave white strips. KDP typically requires 0.125 in bleed on edges that touch the physical trim. Your cover file dimensions include bleed — not just the visible trim size.

Cover planning checklist

  1. Lock trim size in your interior formatter.
  2. Finalize interior page count in print preview.
  3. Calculate spine width and full cover size with these tools.
  4. Estimate print cost with the print cost estimator before setting list price.
  5. Format and export interior PDF in Manusly — step-by-step guide.

Frequently asked questions

Full-wrap cover width = back + spine + front + bleed. Height = trim height + bleed (typically 0.125 in per edge).

Bleed extends artwork 0.125 inches beyond trim so printing tolerances do not leave white edges.

No. Trim and page count both change cover dimensions. Re-export from your cover template after any interior change.

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Format with real trim presets

Manusly applies your trim size, theme, and margins — then exports print PDF and EPUB from the same manuscript.

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