Knitting Needle & Crochet Hook Size Converter
Convert needle and hook sizes between US, UK/Canadian, and metric (mm) instantly, plus find the right size for your yarn weight.
Select a Size
Equivalent Sizes
Knitting Needle
2 mm
Which Size for Your Yarn Weight?
Recommended Needles
US 7 - 9
4.5 - 5.5 mm
Recommended Hook
US I-9 - K-10.5
5.5 - 6.5 mm
Full Yarn Weight Reference Chart
| # | Yarn Weight | Needles (US) | Needles (mm) | Hook (US) | Hook (mm) |
|---|---|---|---|---|---|
| 0 | Lace | 000 - 1 | 1.5 - 2.25 mm | Steel 6-8, B-1 | 1.4 - 2.25 mm |
| 1 | Super Fine (Sock, Fingering, Baby) | 1 - 3 | 2.25 - 3.25 mm | B-1 - E-4 | 2.25 - 3.5 mm |
| 2 | Fine (Sport, Baby) | 3 - 5 | 3.25 - 3.75 mm | E-4 - 7 | 3.5 - 4.5 mm |
| 3 | Light (DK, Light Worsted) | 5 - 7 | 3.75 - 4.5 mm | 7 - I-9 | 4.5 - 5.5 mm |
| 4 | Medium (Worsted, Afghan, Aran) | 7 - 9 | 4.5 - 5.5 mm | I-9 - K-10.5 | 5.5 - 6.5 mm |
| 5 | Bulky (Chunky, Craft, Rug) | 9 - 11 | 5.5 - 8 mm | K-10.5 - M-13 | 6.5 - 9 mm |
| 6 | Super Bulky (Roving) | 11 - 17 | 8 - 12.75 mm | M-13 - Q | 9 - 15 mm |
| 7 | Jumbo (Roving) | 17 and up | 12.75 mm and up | Q and up | 15 mm and up |
Frequently Asked Questions
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