✓ Free — no account needed

Trim size &
spine width calculator.

Get exact spine width, margins, bleed, and cover dimensions for IngramSpark, KDP Print, B&N Press, and Draft2Digital.

Platform specifications

Dimensions calculated. Now check your PDF.

BookReady verifies your interior PDF meets all platform specs — 18 checks, auto-fix included. The check is free.

Check my PDF free →

Related Guides

IngramSpark Error Messages

Decode every IngramSpark rejection error in plain English and find out exactly how to fix it.

Read guide →

Affinity Publisher Ink Coverage

Your Affinity Publisher default black is 295% ink coverage — over IngramSpark's limit. Learn the fix.

Read guide →

Canva 300 DPI Trap

Canva says 300 DPI but IngramSpark still flags low resolution? Here's the actual fix.

Read guide →

Back to the main resource hub

View all free tools →
← Back to all free tools
Stay in the loop

New tools. New platform support. No spam.

We're adding new free tools regularly. Drop your email and we'll let you know when something useful drops.

No spam, ever. Unsubscribe anytime.