Estimate how much yarn a knitted sweater needs — grams per piece and total kilos for a dozen, 100 pieces or your full order — from size, gauge and fabric weight. Indicative for planning only; real consumption is confirmed when we knit a sample.
⚠️ Indicative for planning only — confirm with a knitted sample. These figures come from the formula yarn (g) ≈ garment area (m²) × fabric weight (GSM) × (1 + waste), using approximate surface areas and a rough GSM by gauge. Real yarn usage shifts with stitch structure (cables and rib use more than plain jersey), tension, trims and linking loss — expect roughly ±15%. Actual consumption is confirmed when we knit your sample.
Yarn (g) ≈ garment area (m²) × fabric weight (GSM) × (1 + waste). Every number on this page comes from that one line — no black box. A women's M at 0.65 m² × 300 GSM × 1.12 waste is about 218 g.
Fabric weight is the biggest lever after size. A chunky 3–5gg knit runs near 450 GSM, mid 7–8gg near 300, fine 12–14gg near 200 — so a chunky sweater can use over twice the yarn of a fine one at the same size.
The 12% default covers linking and cut loss, machine set-up ends, test pieces and rejects. Complex stitches and small runs push it higher — swap in your own factory's historical loss once you know it.
This is a planning figure to size a yarn order and budget, not a purchase spec. Actual consumption is measured on a knitted sample — treat the estimate as ±15% and confirm before committing to a fibre volume.
Related: Cost Calculator · Knitwear Manufacturer · For Startups. Once you know the yarn per piece, budget the run with the cost calculator, split each colourway across sizes with the size run calculator, and see what a small-batch run looks like end to end.
A typical mid-gauge women's sweater uses roughly 200–350 g of yarn depending on size, fibre and stitch. This tool estimates it from garment surface area × fabric weight (GSM) × a waste allowance — for example a women's M at 300 GSM with 12% waste works out to about 218 g. It's a planning figure; real consumption is confirmed by knitting a sample.
It is indicative only. Garment area and GSM are approximations, and real usage shifts with stitch structure (cables and rib eat more yarn than plain jersey), knit tension, trims and cut/linking loss. Expect the true figure to land within roughly ±15% of the estimate — always confirm with a knitted sample before committing a yarn purchase.
A 10–15% allowance is typical for flat knitwear, covering linking and cut loss, machine set-up ends, test pieces and rejects. Complex constructions and small runs sit at the higher end. This calculator defaults to 12%; replace it with your own factory's historical loss figure when you have it.
Gauge sets fabric weight. A chunky 3–5gg knit is a heavy fabric (around 450 GSM), a mid 7–8gg is roughly 300 GSM, and a fine 12–14gg is lighter (around 200 GSM). A chunky sweater can use more than twice the yarn of a fine-gauge one at the same size — so gauge, not just fibre choice, is a major driver of your yarn budget.
Send your tech pack and target gauge and we'll knit a sample, weigh the real yarn consumption, and reply within one business day with pricing and an honest feasibility read — no black-box numbers.