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Strip Piecing Calculator — Strip Quantities & Fabric
Calculate strip quantities for strip-pieced quilt blocks and designs.
How We Calculate This
Strips are cut across the width of fabric (WOF, selvedge to selvedge), so each strip’s length runs along the fabric width and the fabric length you buy is set by how many strips you stack down the bolt.
The formula
Cut width = Finished width + (Seam allowance × 2)
Fabric length = Number of strips × Cut width
Each WOF cut yields a strip as long as the usable fabric width; if your strip length is shorter you may get more than one strip per cut. The result is rounded up to the nearest 0.1 m.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify quantities before cutting or purchasing fabric.