Take a closer look
Here is how you can find out what the correct size of your paperback books for KDP publishing
KDP Paperback Calculator
Cover size & interior margin calculator for Amazon KDP paperbacks
Units:
Full cover dimensions (with 0.125" bleed)
Back cover + spine + front cover, for your print cover PDF.
Full cover width
—
Full cover height
—
Spine width
—
Cover checklist: export at 300 DPI · keep text & logos at least 0.125" inside the trim line · KDP places its barcode in a 2" × 1.2" zone at the bottom-right of the back cover (0.25" from edges) — leave it clear unless you supply your own ISBN barcode · spine text needs 79+ pages and 0.0625" clearance on each side of the spine.
Interior page setup
Page size in your file
—
Gutter (inside margin)
—
based on page count
Outside / top / bottom
—
minimum margin
KDP gutter table
| Page count | Gutter (inside margin) |
|---|---|
| 24 – 150 | 0.375" (9.5 mm) |
| 151 – 300 | 0.5" (12.7 mm) |
| 301 – 500 | 0.625" (15.9 mm) |
| 501 – 700 | 0.75" (19 mm) |
| 701 – 828 | 0.875" (22.2 mm) |
Word setup: Layout → Margins → Custom → set "Multiple pages" to Mirror margins, put the gutter value in "Inside". With bleed, add 0.125" to the outside, top and bottom of the page size (never the gutter side) and set outside margins to at least 0.375".
KDP Paperback Calculator
Cover size & interior margin calculator for Amazon KDP paperbacks
Units:
Full cover dimensions (with 0.125" bleed)
Back cover + spine + front cover, for your print cover PDF.
Full cover width
—
Full cover height
—
Spine width
—
Cover checklist: export at 300 DPI · keep text & logos at least 0.125" inside the trim line · KDP places its barcode in a 2" × 1.2" zone at the bottom-right of the back cover (0.25" from edges) — leave it clear unless you supply your own ISBN barcode · spine text needs 79+ pages and 0.0625" clearance on each side of the spine.
Interior page setup
Page size in your file
—
Gutter (inside margin)
—
based on page count
Outside / top / bottom
—
minimum margin
KDP gutter table
| Page count | Gutter (inside margin) |
|---|---|
| 24 – 150 | 0.375" (9.5 mm) |
| 151 – 300 | 0.5" (12.7 mm) |
| 301 – 500 | 0.625" (15.9 mm) |
| 501 – 700 | 0.75" (19 mm) |
| 701 – 828 | 0.875" (22.2 mm) |
Word setup: Layout → Margins → Custom → set "Multiple pages" to Mirror margins, put the gutter value in "Inside". With bleed, add 0.125" to the outside, top and bottom of the page size (never the gutter side) and set outside margins to at least 0.375".
