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Calculate pre-wash fabric dimensions to account for shrinkage percentage. Free fabric shrinkage calculator for sewing, quilting.
Calculate total seam allowance needed when cutting fabric pieces. Account for seam width on both sides of each pattern piece.
Grade sewing patterns up or down between sizes with proportional adjustments. Scale bust, waist, hip, and length measurements evenly.
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.
Yards ≈ area (sq in) × yarn weight factor × stitch densityThe calculation requires: Project Width, Project Height, Yarn Weight, Stitch Type. 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.
Estimate yarn yardage needed for crochet blankets, scarves, and garments by stitch and size. Free crochet yarn estimator for project planning and budgeting. It applies the calculation formula (Yards ≈ area (sq in) × yarn weight factor × stitch density). For example: adult blanket 50×60 in, worsted weight sc — A typical use case demonstrating the calculator with representative values.