Spine Width Calculator — Case Bound (Hardcover)

Calculate spine width for case-bound hardcovers, accounting for board thickness and hinge area. Enter your page count and text stock to get the spine (mm) and a cover spread size suitable for case wrap or jacket layouts.

• Inputs: Total page count, text paper (gsm), case/board spec, hinge allowance
• Output: Spine width (mm) and case cover spread (including turn-ins/hinges)
• Use cases: Children’s books, gift editions, yearbooks, premium runs
• Tip: Include 3 mm bleed and the correct turn-in for your case wrap
• Tolerance: Allow ±0.5–1.0 mm due to board, glue and bulk variances