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Calcimator

Thread Length Binding Calculator

Calculate how much sewing thread you need for Coptic, Japanese stab, kettle stitch, and long stitch bookbinding.

Inputs

Results

Thread needed (cm)

244

Thread needed (meters)2.44
Thread needed (feet)8
Per signature (cm)26.5
Signatures8
Thread needed (inches)96
Style NameKettle Stitch (Link Stitch)
How to Use This Calculator
  1. Enter the finished book height in millimeters.
  2. Enter the total number of signatures (folded sections) in the book.
  3. Select the binding style: Coptic, Japanese stab, kettle stitch, or long stitch — each uses thread differently.
  4. Enter the number of sewing stations (holes) per signature.
  5. Read the total thread needed in cm, meters, and feet including the 15% safety margin.
  6. Cut your thread to the calculated length before starting to sew to avoid running out mid-section.
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