Knitting Needle Size Converter
US and UK needle sizes run in opposite directions — US counts up as needles get bigger, UK counts down. Metric millimeters is the one consistent reference between them. Enter a size in any system.
or pick a needle size:
- Metric
- 6 mm
- US
- 10
- UK / Canada
- 4
Full conversion table
| Metric | US | UK / Canada |
|---|---|---|
| 2 mm | 0 | 14 |
| 2.25 mm | 1 | 13 |
| 2.5 mm | 1.5 | — |
| 2.75 mm | 2 | 12 |
| 3 mm | 2.5 | 11 |
| 3.25 mm | 3 | 10 |
| 3.5 mm | 4 | — |
| 3.75 mm | 5 | 9 |
| 4 mm | 6 | 8 |
| 4.5 mm | 7 | 7 |
| 5 mm | 8 | 6 |
| 5.5 mm | 9 | 5 |
| 6 mm | 10 | 4 |
| 6.5 mm | 10.5 | 3 |
| 7 mm | — | 2 |
| 7.5 mm | — | 1 |
| 8 mm | 11 | 0 |
| 9 mm | 13 | 00 |
| 10 mm | 15 | 000 |
| 12.75 mm | 17 | — |
| 16 mm | 19 | — |
| 19 mm | 35 | — |
| 20 mm | 36 | — |
| 25 mm | 50 | — |