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Calculate how many yards of fabric you need for a sewing project. Plan pattern layout, width, and repeats to buy the right amount of material.
Calculate quilt backing fabric needed including overhang and seam allowance. Size backing for longarm, domestic machine, or hand quilting projects.
Calculate seam allowance adjustments for pattern alterations and garment fitting. Add or subtract ease when resizing or modifying sewing patterns.
This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
Strips Needed = Ceiling(Target Width ÷ Strip Width); Fabric = Strips × Strip WidthThe calculation requires: Target Finished Width (inches), Strip Cut Width (inches), Seam Allowance (inches). Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
When a formula combines multiple measurements, all inputs must use compatible units. Convert everything to the same system (metric or imperial) before calculating.
Calculate strips to sew together for a desired pieced unit width. Free strip piecing width calculator for quilting projects, patchwork, and fabric layout. It applies the calculation formula (Strips Needed = Ceiling(Target Width ÷ Strip Width); Fabric = Strips × Strip Width). For example: 12.5 in unit from 2.5 in strips with 1/4" seams — A typical use case demonstrating the calculator with representative values.