Formulas for Quilters

(C)2002 Karen Combs Studio

1.  Square:  Add ½” to the height and length of the finished size.





2.  Half-square Triangle:  Add 7/8” to the height and length of the finished size of the square made from sewing two half-square triangles together.  Cut square in half, diagonally to create two half-square triangles.







  1. Quarter-square Triangle:  Add 1 ¼” to the finished size of the longest side of the quarter-square triangle.




                             Longest Side


  1. To figure the finished diagonal measurement of a block, multiply the finished size by 1.41.


5.  Multiply the finished length of a diamond patch by 3.41 to find the finished block size for an 8 pointed star.

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