What does 300 DPI mean for KDP interior pages?
Short answer: For image-based paperback interiors, 300 DPI means the page pixel dimensions are calculated from the final printed page size. For example, an 8.5 by 11 inch page at 300 DPI is 2550 by 3300 pixels before any additional bleed area is considered.
Why authors get stuck
Artwork files often arrive in different pixel sizes. If those images are placed directly into a PDF without a consistent page canvas, KDP Previewer may show unexpected scaling, margins, or resolution warnings.
How Book Interior Kit helps
Book Interior Kit calculates the page canvas from the selected KDP preset, places each image onto that canvas, and creates a local PDF preview so the author can check order, fit, bleed, and margins before export.
A 300 DPI canvas cannot restore detail from a low-quality original image. Start with the highest-resolution artwork available, then inspect the final PDF in KDP Previewer.
Book Interior Kit is independent software, is not affiliated with Amazon or KDP, and does not guarantee KDP approval.