Description
Take the guesswork out of preparing a professional book cover.
Roxie’s Cover & Spine Calculator is a practical production tool for independent authors, publishers, cover designers, and formatters who need accurate cover measurements before opening Photoshop, InDesign, Affinity, Canva, or another design program.
Enter your book’s trim size, page count, paper type, and binding, and the calculator works out the measurements you need, including:
- Spine width
- Full cover dimensions
- Front and back panel sizes
- Bleed, hinge, wrap, and flap allowances
- Guide positions
- Inches and millimeters
- 300-DPI pixel dimensions
- Visual flat-cover planning diagram
The calculator includes support and planning tools for Amazon KDP paperbacks, KDP hardcover case laminate, Lulu hardcover casewrap, BookVault casebound books, custom case wraps, and custom dust jackets.
It also helps identify situations where the printer’s own generated template should be used as the final production authority, an especially important safeguard for hardcover and specialty-print projects.
Private, Simple, and Yours to Keep
There is no AI, no account, no subscription, and no manuscript upload.
The calculator runs privately in your regular web browser and can be used offline. You can save a working project, copy your measurements, download a production report, or print the results for your files.
Buy it once. Keep it in your publishing toolbox. Use it whenever you need it.
Ideal for self-publishing authors, small publishers, book designers, formatters, and anyone producing books for more than one printing platform.
Printer specifications may change. Always compare final production artwork with the printer’s current requirements and generated template.
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