How to Calculate KDP Paperback Spine WidthHow to Calculate KDP Paperback Spine Width
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DAN's avatar
DAN VAU
• Oct 12
How wide is your book's spine?
For a KDP paperback, spine width depends on your final page count and paper type. For example, a 246-page book on white paper with a black and white interior comes to about 0.554 in (246 x 0.002252 in).
Cream paper and color interiors use different numbers, so always check the current KDP cover calculator for your exact book before you finalize the design.
If the page count changes after the cover is done, the spine has to change too. That is why I always ask for the final page count first.
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Benjamin C
max
• Oct 12
saving this. the 0.002252 multiplier is one of those numbers i always end up googling again
DAN's avatar
DAN VAU
• Oct 12
Happy to help, Benjamin! If you ever want the other paper types in one cheat sheet (cream, colour, hardcover), tell me and I'll post it. Are you designing your own covers or publishing a book?
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