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Star Block Calculator

Cutting math for popular star quilt blocks.

Star Type:

Finished Block Size (inches):

Blocks Needed:

Width of Fabric (inches):

Star Block Tips:

  • Star blocks work best in sizes divisible by 3 (6", 9", 12", etc.)
  • Sawtooth Star uses the no-waste flying geese method (4 at a time)
  • Ohio Star QSTs: cut two squares, layer, cut diagonally both ways, mix and sew
  • Press star points toward the background for less bulk at the center
  • Use a design wall to preview star placement before sewing