KDP margin calculator
KDP's gutter grows as a book gets thicker. Enter your page count to see the margins it needs and how much room that leaves for each puzzle.
- Inside (gutter)
- 0.375 in
- Outside, top and bottom
- 0.250 in
- Room left for the puzzle
- 5.375 x 8.500 in
| Pages | Inside margin |
|---|---|
| 24 to 150 pages | 0.375 in |
| 151 to 300 pages | 0.500 in |
| 301 to 500 pages | 0.625 in |
| 501 to 700 pages | 0.750 in |
| 701 to 828 pages | 0.875 in |
What is the gutter?
The inside margin, next to the spine. Thicker books curve more there, so KDP asks for a wider gutter as page count goes up.
Do puzzle books need bleed?
Usually not. Puzzle pages are white with black lines, so a no-bleed interior is simpler and is what Puzzlil exports.
What happens if my margins are too small?
KDP flags the file during review and asks you to fix it before the book can go live.
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