About This Tool
### Stop Guessing Gauge
Knitting and Crochet hook sizes are confusing. The US uses numbers (0-15), the UK/Canada uses old gauges (14-000), and the rest of the world uses Metric (mm).
**Needle Converter** translates them all instantly.
### Why it matters
* **Vintage Patterns**: Often use old UK sizes (where larger numbers = smaller needles).
* **Modern Patterns**: Mostly use Metric (mm).
* **Yarn labels**: Often list a recommended Metric size.
Using the wrong needle can ruin your garment's fit. Always check the conversion.
Key Features
- **Tri-System Support**: Converts US, UK/Canadian, and Metric simultaneously.
- **Visual Size Chart**: See relative sizes at a glance.
- **Works for Hooks too**: Standard crochet hooks follow the same metric sizing.
- **Mobile Friendly**: Check sizes while standing in the yarn aisle.
Frequently Asked Questions
Are knitting needles and crochet hooks the same size?
In Metric (mm), yes. A 5.0mm knitting needle is the same diameter as a 5.0mm (H/8) crochet hook. However, the letter/number naming conventions differ in the US.
Why do UK sizes go backward?
The old UK system was based on Standard Wire Gauge (SWG). A higher number meant the wire was drawn thinner. So a size 14 is tiny (2mm), while a size 0 is huge (8mm).