Quilt Backing Calculator

Calculate backing fabric yardage, including how to piece the backing for wider quilts.

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How It Works

Quilt backing should be 4 inches larger than the quilt top on each side. Standard quilting cotton is 42-44 inches wide, so quilts wider than about 38 inches need pieced backing. Wide backing fabric (108 inches) eliminates piecing for most quilts but costs more. When piecing, press seams open to reduce bulk under the quilting.