A scarf is the simplest shape to estimate — just length × width — but a 180 cm long scarf uses double the yarn of a 90 cm one, which catches many beginners off guard.
Because it's a pure rectangle, there are almost no estimation surprises for a scarf — the only variable is stitch pattern. Lace uses around 15% less yarn than stockinette; cables use 35% more; ribbing falls in between at about 20% more. The big trap is length: a generous 200 cm scarf will eat through two full 100 g skeins of worsted even in stockinette. Width matters too — a wide 35 cm infinity-style scarf approaches cowl yardage. Fringe is often forgotten entirely; long fringe on a 35 cm wide scarf can add 100 m or more.
Calculated with 8 yarn weights, size M, 15% reserve. Pattern: Knitting → Stockinette · Crochet → Double crochet.
| Yarn weight | Meters per 100 g | Balls needed | Total meters | Approx grams |
|---|---|---|---|---|
| Lace | 600–1200+ m / 100g | 1 | 414 m | ~52 g |
| Fingering | 350–550 m / 100g | 2 | 467 m | ~109 g |
| Sport | 250–350 m / 100g | 2 | 419 m | ~140 g |
| DK | 200–300 m / 100g | 2 | 440 m | ~176 g |
| Worsted / Aran | 150–220 m / 100g | 3 | 373 m | ~202 g |
| Bulky | 80–140 m / 100g | 3 | 296 m | ~269 g |
| Super Bulky | 40–80 m / 100g | 4 | 205 m | ~342 g |
| Jumbo | < 40 m / 100g | 5 | 124 m | ~414 g |
| Yarn weight | Meters per 100 g | Balls needed | Total meters | Approx grams |
|---|---|---|---|---|
| Lace | 600–1200+ m / 100g | 1 | 497 m | ~62 g |
| Fingering | 350–550 m / 100g | 2 | 561 m | ~130 g |
| Sport | 250–350 m / 100g | 2 | 503 m | ~168 g |
| DK | 200–300 m / 100g | 3 | 528 m | ~211 g |
| Worsted / Aran | 150–220 m / 100g | 3 | 448 m | ~242 g |
| Bulky | 80–140 m / 100g | 4 | 355 m | ~323 g |
| Super Bulky | 40–80 m / 100g | 5 | 246 m | ~410 g |
| Jumbo | < 40 m / 100g | 5 | 149 m | ~497 g |
The yardage multiplier (×) shows how much more yarn each stitch uses relative to stockinette / double crochet baseline. Sorted by yarn efficiency.
Open mesh saves yarn
Baseline—minimum yardage
Bulkier, +20%
Crossings eat +35%
Two-yarn floats
Minimum draw
Open motifs
Pieced motifs
Airier, lighter
Between sc and dc
Tightest fabric
Fabric area scales from XS to 2XL. Use this to understand why larger sizes need significantly more yarn.
| Size | Area multiplier | Fabric area (m²) |
|---|---|---|
| XS | ×0.78(-22%) | 0.35 m² |
| S | ×0.88(-12%) | 0.40 m² |
| M | ×1.00(baseline) | 0.45 m² |
| L | ×1.14(+14%) | 0.51 m² |
| XL | ×1.28(+28%) | 0.58 m² |
| 2XL | ×1.42(+42%) | 0.64 m² |
They're empirical multipliers measured against stockinette (1.0). Cables and stranded colourwork eat more yarn because of the extra bulk; lace and filet use less. The numbers are averages — if your tension is unusual, drop in a real swatch in advanced mode and we'll override them.
Simple mode falls back to typical gauges for the yarn weight you picked. For wearables we still recommend a 10×10 cm swatch — once you have one, switch to advanced mode and the maths gets sharper.
The base calc is area-based. Tricky shapes (raglan, A-line, hooded) are absorbed by the 10–20% buffer; for full-body cabled sweaters or steeked cardigans we suggest pushing it to 25%.
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