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Calculate warp yarn requirements for loom weaving projects. Estimate total warp threads, yardage, and sett from project width and EPI.
Calculate total warp length including loom waste, take-up, and shrinkage for weaving projects. Plan yarn requirements accurately.
Calculate fiber blend percentages and weights for spinning and yarn production. Mix ratios for wool, silk, cotton, and synthetic blends.
Picks per inch multiplied by width gives inches of weft per inch of weaving. Multiply by woven length and convert to yards.
Weft yards = PPI × Width (in) × Woven length (in) ÷ 36Add 10–15% for weft take-up (over-and-under path) and wet finishing shrinkage.
Adjusted weft = Calculated weft × 1.10–1.15Sum warp and weft. If using different yarns, calculate and purchase each separately.
Total = Warp yards + Weft yards (same or different yarn)Updated: July 2026
Each 18×28 inches at 24 EPI, 24 PPI: ~25 yards warp + ~20 yards weft per towel × 4 = 180 yards total 8/2 cotton.
Warp: 14 yards gray wool. Weft: 8 yards burgundy for weft-faced sections — purchase yarns separately by calculated amounts.
Project needs 800 yards; cones are 840 yards (mini) or 2100 yards (standard). One standard cone covers project with plenty for sampling.
Weaving projects require both warp and weft yarn in potentially different amounts. Enter project dimensions, sett, picks per inch, and yarn specifications to calculate total yardage for warp and weft separately and combined.