Recommended Hook
5.5mm (US I/9)
Range
5–6mm
Gauge
11–14 sc
Chain 15 and work 9 rows in single crochet. Measure the center 4″ × 4″ area.
If your swatch is too small, go up a hook size. If too large, go down a hook size.
| Yarn Weight | Hook (mm) | US Size | Gauge (4″) |
|---|---|---|---|
| Lace (0) | 1.5–2.25 | 4 steel to B/1 | 32–42 sc |
| Fingering (1) | 2.25–3.5 | B/1 to E/4 | 21–32 sc |
| Sport (2) | 3.5–4.5 | E/4 to 7 | 16–20 sc |
| DK (3) | 4–5.5 | G/6 to I/9 | 12–17 sc |
| Worsted (4) | 5–6 | H/8 to J/10 | 11–14 sc |
| Aran (5) | 5.5–6.5 | I/9 to K/10.5 | 11–14 sc |
| Bulky (6) | 6.5–9 | K/10.5 to M/13 | 8–11 sc |
| Super Bulky (7) | 9–15 | M/13 to Q | 5–9 sc |
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Result
For amigurumi with worsted yarn, the calculator recommends 4.0mm — about 2 sizes below standard — to create a tight, stuffing-proof fabric.
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Result
A tight crocheter working a garment in DK yarn should go up to 5.5mm to achieve standard gauge and proper drape.
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Result
A 6.5mm hook works with aran and bulky weight yarns. The final gauge depends on the specific yarn and your tension.
Worsted weight yarn (category 4) typically uses a 5.0–6.0mm hook, which corresponds to US sizes H/8 through J/10. The exact size depends on your personal tension and the project type.
| Yarn Weight | Hook Range (mm) | US Size | Gauge (4″) |
|---|---|---|---|
| Worsted (4) | 5.0–6.0 | H/8–J/10 | 11–14 sc |
| DK (3) | 4.0–5.5 | G/6–I/9 | 12–17 sc |
| Bulky (6) | 6.5–9.0 | K/10.5–M/13 | 8–11 sc |
US crochet hooks use letter/number designations while metric hooks use millimeters. The two systems don't have a perfect 1:1 mapping, so always check the mm measurement printed on the hook.
Gauge determines the finished size of your project. Even a half-stitch difference per inch compounds across an entire garment, potentially making it inches too large or small. A 4-inch gauge swatch takes 10 minutes and prevents hours of rework.
Yes, amigurumi requires a hook 1–2 sizes smaller than the yarn label suggests. This creates a tight fabric that holds its shape and prevents stuffing from showing through the stitches.
Hook material affects how yarn glides and your overall speed. Aluminum hooks are fastest for most yarns, while bamboo and wood hooks grip slippery fibers. Ergonomic handles reduce fatigue on long projects regardless of material.
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Last Updated: Mar 9, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.