Find the minimum inside and outside margins for a paperback setup.
Check the gutter for the final page count and see how an interior bleed choice changes outside margins and exported page dimensions.
What does this tool check?
The minimum inside margin increases as page count grows. If any interior page uses bleed, the whole interior file must use the bleed page size and the outside margin minimum increases.
Your calculated setup
- Minimum inside margin
- 0.375 in
- Minimum outside margin
- 0.25 in
- Outside bleed added
- 0 in
- Total vertical bleed added
- 0 in
Dimensions use the selected final interior page count and BoundHive KDP rules version. Recalculate after the exported interior PDF has its final page count.
Rules version 2026-09-07 · Amazon KDP cover requirements
Use these settings in a new bookInputs, calculation, and limits
- What you enter
- Trim size, page count, and whether any interior page uses bleed.
- How the number is calculated
- The inside (gutter) margin depends on page count: 0.375 in up to 150 pages, 0.5 in up to 300, 0.625 in up to 500, 0.75 in up to 700, and 0.875 in up to 828. Top, bottom, and outside margins are at least 0.25 in without bleed and 0.375 in with bleed. A bleed interior adds 0.125 in to the width and 0.25 in to the height of every page.
- What the result cannot tell you
- These are minimums; a readable layout usually uses more. Interior bleed and cover bleed are separate settings: the cover wrap always includes bleed regardless of this choice.
A 6 x 9 in paperback, black ink on white paper, 200 interior pages, no interior bleed (KDP rules version 2026-09-07):
- Inside (gutter) margin: 0.5 in, because 200 pages falls in the 151 to 300 page band.
- Outside, top, and bottom margins: at least 0.25 in without bleed, at least 0.375 in with bleed.
- If any page used bleed, every page in the file would be 6.125 x 9.25 in instead of 6 x 9 in.
Which trim size, page count, margins, and bleed setting work together for my paperback?
Check the complete combination first: a trim size, ink and paper type, and page count must be a supported KDP set, and the page count then fixes the minimum inside margin and whether the interior needs a bleed page size.
Set the format in a book projectUnderstand the decision
How BoundHive keeps the answer reproducible
The calculator uses the same versioned specification catalog as Book Studio. It validates the complete option combination before returning a dimension and records the rules date with the result.
Amazon can change requirements. Recheck the final files against the current KDP previewer and official documentation immediately before submission.