KDP Book Formatter
Interior sizing & cover calculator for Amazon KDP Print
✦ Rooted In Hope Tools
Book Configuration
Choose your KDP trim size and paper. Spine and cover dimensions calculate automatically.
With bleed: KDP adds 0.125″ to page width and 0.25″ to page height. Outside margins must be ≥ 0.375″. Use this if any image or color background runs to the edge of the page.

Without bleed: Page stays at exact trim size. Outside margins must be ≥ 0.25″. Use this only if every page has a plain white background with no edge-to-edge content.
📐 Spine Calculator
Back
Spine
Front
Spine:
Cover total W:
Cover total H:
📄 Final Interior Page Size
Trim only:
With bleed (export size):
Required outside margin:
KDP formula: pages × paper thickness.
White = 0.002252″/pg · Cream = 0.0025″/pg.
Add 0.125″ bleed to all four sides of cover.