Windows 10 & 11 Native Desktop
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SpineReady
Book Cover Geometry, Perfected

Never suffer a KDP or IngramSpark cover rejection email again. SpineReady applies official publishing mathematical formulas to calculate your exact spine width, bleed margins, and barcode safe zones — in seconds, 100% offline.

Get on Microsoft Store ($6.99)
$6.99 ONE-TIME No subscriptions · Lifetime tool
100% Offline PNG & PDF Template Export 4 Platforms Supported Barcode Zone Mapping
Interactive Testbed

Test the Geometry Right Here

Adjust the sliders below to see how paper stock and page count dynamically determine the cover wrap dimensions.

SpineReady Precision Cover Engine — Interactive Blueprint
Live Simulation
BACK COVER
BARCODE ZONE
0.72"
FRONT COVER
Spine Width: 0.721" (18.3 mm)
Full Print Spread: 12.971"
Bleed Required: 0.125" each edge
Production Interface

Designed for Fast, Error-Free Output

Native Windows controls, side-by-side platform specs comparison, and high-resolution blueprint exports.

Platform Spec Selection
SpineReady Platform Selection Screen

Amazon KDP, IngramSpark, B&N Press & Draft2Digital

Switch platforms with a single click. SpineReady updates the paper calibration curves instantly.

Real-Time Calculation Engine
SpineReady Book Information and Spine Calculator

Detailed Book Specifications

Supports Paperback, Hardcover (with wrap flaps), Left-to-Right, and Right-to-Left binding directions.

Ebook Pixel Requirements
SpineReady Ebook Cover Pixel Dimensions

Ebook Aspect Ratios & Resolutions

Get optimal pixel dimensions (e.g. 2,560 × 1,600) for sharp digital storefront rendering.

Side-by-Side Platform Matrix
SpineReady Platform Comparison View

Going Wide? Compare All Specs

Inspect where KDP and IngramSpark diverge on trim, spine width, and safety margins before commissioning artwork.

Print Geometry Specifications

Standard 6×9 Spread Reference

250 Pages · White Stock
Spine Width (KDP) 0.5630 in (14.30 mm)
Spine Width (IngramSpark) 0.5625 in (14.28 mm)
Outside Bleed Margin 0.125 in (3.175 mm)
Spine & Edge Safe Area 0.25 in (6.35 mm)
Standard Barcode Zone 2.0 in × 1.2 in (bottom-right)
Download SpineReady from Microsoft Store ($6.99 One-Time)