📐 KDP Cover Calculator

Calculate exact spine width, bleed area, safe zones, and total cover dimensions for your KDP paperback.

Minimum 24 pages, maximum 999

How to Use the Cover Calculator & FAQs

Everything you need to know about KDP cover dimensions.

Step-by-Step Guide

  1. Enter Page Count: Input the exact number of pages in your formatted manuscript (minimum 24).
  2. Select Paper Type: Choose between white, cream, or color paper. This drastically changes the spine width!
  3. Choose Trim Size: Select your desired book size (e.g., 6" x 9").
  4. Get Dimensions: The calculator will instantly output your spine, bleed, and total cover dimensions in inches, mm, and px.

Frequently Asked Questions

What is "Bleed" in KDP Book Publishing?

Bleed is the extra space added to the edges of your book cover design. Because commercial printers cannot always cut exactly to the edge with 100% precision, design backgrounds and images must extend beyond the final "trim" size. Amazon KDP requires exactly 0.125 inches (3.2 mm) of bleed on the top, bottom, and outside edges of your cover. Without bleed, you risk having thin white margins on the edges of your printed book.

Why does Paper Type affect my Spine Width?

Different paper stocks have different thicknesses. For example, KDP's cream paper is slightly thicker (0.0025 inches per page) than their standard white paper (0.002252 inches per page). If you design a cover for a 300-page book using white paper measurements, but print it on cream paper, your spine text will not align correctly and will wrap around to the front or back cover. Always finalize your paper choice before designing the cover.

What is the "Spine Safe Zone"?

The spine safe zone is a critical area (0.0625 inches or 1.6 mm on each side of the center fold) where you must not place any essential text or logos. Because book binding has a slight margin of error, keeping your spine text strictly within the center ensures it won't get cut off or awkwardly folded onto the front cover.

How do I use these dimensions in Canva or Photoshop?

In Canva, click "Create a Design" > "Custom Size". Ensure the unit is set to Pixels (px) or Inches (in). Enter the Total Cover Width and Total Cover Height provided by our calculator. Remember, you only need to create ONE continuous canvas that includes the back cover, spine, and front cover from left to right. Ensure your file is saved at 300 DPI for high-quality printing.