Cover check · Full wrap

Spine math, done for you.

Upload your full-wrap cover PDF and tell us the book it belongs to. We verify the dimensions, bleed, and barcode zone against KDP's template.

Drop your cover PDF here, or

Full-wrap PDF · back + spine + front

Trim size

Interior page count

Paper type

Computed spine width

—

Enter page count to calculate

No cover file ready? ⚡ Try Sample Cover (Instant Demo)

Spine width is calculated from KDP's published formula and is approximate. Always confirm against KDP's own cover calculator before your final upload.