Book Cover Calculator

Work out the exact spine width and full wraparound cover size for your book, see a labeled bleed/safety-margin diagram update live, and download a to-scale guide template (SVG or PNG) to design against.

Book specs

Binding

Trim size

Paper & ink

Page count

Units

Results

Spine width –

Enter a page count to see your full results.

Cover layout diagram

Enter a page count to see your cover layout diagram.

Paperback spine, bleed and margin figures are taken directly from Amazon KDP's published cover-creation help documentation. Hardcover spine width is not publicly formularized by Amazon and is estimated here — always confirm final dimensions with KDP's own cover calculator and downloadable template before uploading print-ready files.