All KDP tools
Free calculators that work without an account, and a workspace with everything a print book needs between the manuscript and the upload.
Free KDP calculators
Each calculator is a plain web page: the numbers are worked out on the server and are in the page before any script runs. There is nothing to sign up for and nothing to upload.
- KDP cover size and spine width calculatorFull cover dimensions, spine width, bleed, safety area and barcode position for any trim, paper and page count.No sign-up
- KDP interior margin calculatorThe minimum inside (gutter) and outside margins for your page count and trim, with and without bleed.No sign-up
Workspace
Print setup
- CalculatorGet the exact spine width and full cover size for any trim, paper and page count.
- InteriorsGenerate print-ready journals, planners, logbooks and grids as vector PDFs.
- CoversLay your artwork on a cover template with bleed, spine and barcode area marked.
- Pre-flightCheck an interior or cover PDF for the problems that get files rejected.
- Batch auditRun the pre-flight check on a whole stack of PDFs in one pass.
Listing
Reference
The rules behind the numbers
Every figure these tools print is explained in the KDP guides, with worked examples computed by the same code.

