KDP margins by page count
The thicker a book, the more it curves toward the binding: KDP requires an inside margin that grows with the page count.
The official gutter table
| pages | in | mm |
|---|---|---|
| 24–150 | 0.375 in | 9.5 mm |
| 151–300 | 0.5 in | 12.7 mm |
| 301–500 | 0.625 in | 15.9 mm |
| 501–700 | 0.75 in | 19 mm |
| 701–828 | 0.875 in | 22.2 mm |
You receive: the interior PDF ready to upload to KDP, the EPUB for the ebook, and the exact dimensions of your cover.