Crochet Yarn Calculator
Estimate how much yarn you need for crochet projects including blankets, scarves, hats, and sweaters based on size and yarn weight.
Crochet vs knitting yarn usage
Crochet typically uses 25–30% more yarn than knitting for the same finished dimensions. This is because crochet stitches are taller and use more yarn per stitch than comparable knitting stitches. This is an important consideration when substituting yarn between knitting and crochet patterns.
Yarn weight categories
Yarn weight determines how thick the yarn is and directly affects how much length is on each skein (thicker yarn = fewer meters per 100g):
- Lace / Fingering (weight 0–1): Very thin. 350–500+ m per 100g.
- Sport / DK (weight 2–3): Light. 200–350 m per 100g.
- Worsted / Aran (weight 4): Medium, most common. 150–200 m per 100g.
- Bulky (weight 5–6): Thick. 80–150 m per 100g.
- Super Bulky (weight 7): Very thick. Under 80 m per 100g.
Project yarn requirements (approximate)
These estimates are for average gauge and standard project sizes. Always buy 10–15% extra as a safety buffer — dye lots vary between skeins, and running out mid-project means you may not find an exact colour match.
- Baby blanket (90 × 90 cm): 800–1,200 m worsted; 400–600 m bulky
- Throw blanket (120 × 150 cm): 1,500–2,500 m worsted; 800–1,200 m bulky
- Scarf (180 cm long): 200–350 m worsted
- Beanie hat (adult): 100–150 m worsted; 60–80 m bulky
- Sweater (adult M): 900–1,400 m worsted
- Amigurumi (medium, 15 cm): 60–100 m worsted
Swatch before you start
Always crochet a 10 × 10 cm swatch with your chosen yarn and hook size to check your gauge. If your gauge does not match the pattern, your yarn requirements will differ.