Sewing & fabric
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Sewing and quilting math without local pricing: fabric yardage and area from bolt width, oz/yd² ↔ GSM weight conversion, cut sizes with seam allowance, uniform pattern scaling, and continuous bias tape yield from a fabric square. US and metric units throughout — charts vary by brand; use as planning estimates.
5 tools in this section
Fabric Yardage
Calculate fabric yardage and square area from cut length and fabric width. Free sewing calculator for quilt and garment planning.
Fabric Weight
Convert fabric weight between ounces per square yard and GSM (grams per square meter). Free fabric weight converter for sewing and quilting.
Seam Allowance
Add seam allowance to finished pattern dimensions for cutting fabric. Free seam allowance calculator for sewing.
Pattern Scale
Scale sewing pattern dimensions by percentage. Free pattern resize calculator for grading and print scaling.
Bias Tape
Estimate continuous bias tape length from a fabric square and strip width. Free bias binding calculator for quilting and garment finishing.