The spine calculations are for most people a confusing element. We have made a guideline tool for you to easily calculate the spine based on the paperweight, paper type, and cover type.
Get the formula to calculate the spine width here: How to calculate spine width
Select paperweight, paper type, cover type and page count, then click 'Calculate'.
This spine width calculation uses average bulk values. The characteristics of the paper used by different print partners may vary.
Case Wrap books mostly use pre-cut cardboard in the spine. The cardboard is therefore in a number of fixed sizes. These sizes may vary between print partners.