This calculator calculates all the key dimensions of a square in a square block
given either the finished inside square length or the finished outside square length as a starting point.
For example, suppose the length of the inside finished square is 5 inches. The calculator will determine that the outside finished square is 7 1/8 inches. It will also tell you that you will need to cut a square (the corner side square) with a side whose length is 4 3/8 inches. You will then cut that square along the diagonal to create 2 triangles that are pieced with the inside square. You will need to cut 2 such squares to create a total of 4 triangles so as to complete the outer square.
Please note that this calculator assumes a 1/4 inch seam allowance and all calculated measurements are to the nearest 1/8 inch.
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This calculator is designed and copyrighted by Quilter's Paradise. It is available free to use strictly for non-commercial, personal purposes only. Quilter's Paradise makes no warranty or representation as to the calculator's quality, performance or accuracy, and, in no event, will be liable for any damages resulting from its use. The user assumes the entire risk as to the calculator's quality, performance and accuracy.
Web site last updated October 9, 2015
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