Tools · Spine width calculator

Work out your spine width
in a click.

Tell us your page count, paper stock and binding, we'll give you an accurate spine measurement in millimetres, ready to drop straight into your cover design.

Your book

Spine is calculated on even page counts, odd numbers round up.

Spine width

…mm
Enter your spec on the left to calculate.
Your spine width is the combined thickness of every page plus the cover or case. If anything's off, our prepress team picks up on it before your job goes to print.
Got your cover designed?
Check it with our cover file checker, we'll flag any dimension issues.
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Ready to design your paperback cover?
Explore templates and artwork. The builder calculates your spine from your book details.
Need pricing for this spec?
Open the quote calculator, 5 quick steps, no account.
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How much will it weigh?
Same paper data, one more answer, per-book grams, run totals and carton counts.
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Only have a word count?
Words-to-pages estimates your page count before the spine exists.
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DESIGN YOUR BOOK

Still working
on your cover?

Use your book size, final page count and paper to plan a paperback cover. Add your title, blurb and artwork in Cover Builder, with a guide to help you get started.

Design your cover Watch the step-by-step guide

Try it without an account. Sign in to save your work.

All the Miles Home, an example paperback cover The Little Moon Explorer, an example paperback cover The Seasonal Kitchen, an example paperback cover
Example designs. Make something that feels like you.