CoverRescue

KDP Cover Bleed & Margin Calculator

Build the required 0.125-inch bleed into the full cover spread and protect important content from trim.

Private, local check

KDP paperback setup

Enter the final paperback production settings.

Finished front-cover width and height.

Use the page count shown after KDP processes the interior file.

Paper thickness determines the spine coefficient.

Paperback formula: two trim widths + spine + 0.125 in bleed on both outer edges; trim height + 0.25 in total bleed.

Your result

Your KDP cover dimensions

Full cover13.050 × 9.250 in331.5 × 235 mm
Spine width0.8000 in20.3 mm
Pixel size3915 × 2775300 DPI
This page count is above 79 pages, so KDP can print spine text. Keep text at least 0.0625 in from each spine edge.

Cover bleed is required on every outer edge

A paperback cover spread adds 0.125 inch beyond the back-cover edge, front-cover edge, top, and bottom. The spine sits between the two trim-width panels and does not receive another independent bleed allowance.

Keep important content inside the safe area

KDP advises placing content you do not want trimmed at least 0.25 inch from the outside cover edge. Spine text also needs 0.0625 inch clearance from each spine edge. The visual diagram distinguishes bleed from the trim line.