M&K Print Resources
Spine Width Calculator
Estimate how thick your book will be from its page count and paper. Ask us for the paper's PPI or caliper and we will confirm the final number.
The common papers above are typical industry values as a starting point. Every mill prints sheets a little differently, so we confirm the final PPI before your cover template is made.
Estimated spine width
Enter pages and paper thickness
Paper weight alone does not set thickness, so use the paper's actual PPI or caliper. PPI counts pages, not sheets.
This is a planning estimate. Glue, sewing, endpapers and binding can change the final spine. We send a cover template with the confirmed spine before you finish your artwork.