Calculate the exact spine width and full cover dimensions for Amazon Kindle Direct Publishing paperbacks.
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Spine Width
Designing a paperback cover for Amazon Kindle Direct Publishing requires exact millimeter precision. Our KDP cover calculator gives you the exact spine width and full cover dimensions (including bleed) so your PDF is accepted on the first try.
Cream paper is thicker than white paper, and standard color paper has a different thickness entirely. Our tool applies the exact KDP spine multipliers (0.002252 for white, 0.0025 for cream) based on your page count.