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KDP Margins & Bleed Calculator
KDP rejects books whose text runs too close to the spine or the edge. Enter your trim size and page count to see the minimum gutter, outside margin, safe text area and the page size to export when your art bleeds off the edge.
Gutter (inside)
0.5 in
151–300 pages
Outside margins
0.25 in
Top, bottom and outside, minimum
Page size to export
6 × 9 in
Same as trim
Safe text area
5.25 × 8.50 in
Keep text inside this box
Want the whole book, not just the numbers?
Describe a book in one sentence and kdpbook.us writes, illustrates and lays it out, then exports the KDP-ready interior and cover. Start with 2,000 free credits, no card.
Frequently asked questions
What is the gutter?
The gutter is the inside margin next to the spine. It grows with page count, from 0.375 in for up to 150 pages to 0.875 in for the thickest books, so the text isn't swallowed by the binding.
When do I need bleed?
Whenever an image or background touches the page edge. Add 0.125 in to the outside, top and bottom, which makes the page 0.125 in wider and 0.25 in taller than the trim.
What are the outside margins?
At least 0.25 in without bleed and 0.375 in with bleed. This calculator uses those minimums.
More free KDP tools
KDP Spine Width Calculator
Spine width from page count and paper type, with the spine-text rule.
KDP Cover Size Calculator
Full-wrap cover size in inches, mm and pixels, plus a downloadable template.
KDP Printing Cost Calculator
Print cost per copy and the minimum list price KDP will accept.
KDP Royalty Calculator
Royalty per sale for print and Kindle at any list price.
KDP Trim Sizes
Every standard KDP trim drawn to scale, with page limits.
KDP Rejection Decoder
Paste KDP's rejection email and see each issue with its fix.