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Calculate total yarn yardage for weaving projects including warp and weft. Estimate cones needed from project dimensions and yarn weight.
Calculate total warp length including loom waste, take-up, and shrinkage for weaving projects. Plan yarn requirements accurately.
Calculate optimal weaving sett (EPI and PPI) from yarn wraps per inch and weave structure. Balanced, warp-faced, and weft-faced sett guide.
Multiply weaving width by sett (EPI). Add 4–8 selvedge ends total (2–4 per side) for stable edges.
Ends = Project width (in) × EPI + Selvedge endsAdd loom waste for threading, tying on, and fringe. Front and back loom waste typically 18 inches each.
Length per end = Warp length + Loom waste (27–36 in)Multiply ends by length per end, convert to yards. Add 10% for tension variation and mistakes during warping.
Yards = (Ends × Length per end in inches) ÷ 36Updated: July 2026
168 ends (160 + 8 selvedge) × 3 yard warp plus 30 inches waste = 504 end-yards ≈ 14 yards total warp yarn.
364 ends × 4 yard warp length = 1456 end-yards ≈ 40 yards of 8/2 cotton warp yarn.
900 ends at 12 EPI × 5 yards plus waste = 4500+ end-yards. Order 130 yards accounting for 10% buffer.
Warp planning determines yarn quantity, loom threading, and project width. Enter project width, EPI (ends per inch), warp length, and number of ends to calculate total warp threads and yarn yardage needed including loom waste.