Diagonal Measurement of Squares

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Diagonal Measurements of Squares

When teaching I’m always asked how to determine the diagonal measurement of a quilt block. The principle is the same for a quilt block as it is for a square. To calculate the finished diagonal measurement of a block, multiply the finished size of the block by 1.414. The chart below shows the diagonal measurement of a few common block.

Size of square Diagonal Size of square Diagonal
diagonal chart

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