Formulas for Quilters
(C)2002 Karen Combs Studio
www.karencombs.com
1. Square: Add ½” to the height and length of the finished size.
![](../userfiles/image/formula_for_quilters/image001.gif)
height
![](../userfiles/image/formula_for_quilters/image004.gif)
length
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.
height ![](../userfiles/image/formula_for_quilters/image006.jpg)
length
- Quarter-square Triangle: Add 1 ¼” to the finished size of the longest side of the quarter-square triangle.
![](../userfiles/image/formula_for_quilters/image008.jpg)
Longest Side
- 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.