Match Gauge
Always knit or crochet a gauge swatch before substituting yarns. Even within the same weight category, fiber content and twist can affect your fabric.
Convert Yarn Weights
Select a yarn category to see its equivalent names, ply, and recommended needle/hook sizes.
Yarn Weight Chart
A comprehensive reference for all standard yarn weights, including gauge, needle, and hook sizes.
| Category | Names | Ply | Knitting Gauge (per 10cm) | Needle Size (mm) | Crochet Gauge (per 10cm) | Hook Size (mm) |
|---|---|---|---|---|---|---|
| Lace | 1-2 ply, Cobweb, Thread | 1-2 | 33-40 sts | 1.5-2.25 | 32-42 sc | Steel 0.6-1.4 |
| Fingering | 3-4 ply, Sock, Baby | 3-4 | 27-32 sts | 2.25-3.25 | 21-32 sc | 2.25-3.5 |
| Sport | 5 ply, Baby | 5 | 23-26 sts | 3.25-3.75 | 16-20 sc | 3.5-4.0 |
| DK | 8 ply, Light Worsted | 8 | 21-24 sts | 3.75-4.5 | 12-17 sc | 4.0-5.0 |
| Worsted | 10 ply, Aran, Afghan | 10 | 16-20 sts | 4.5-5.5 | 11-14 sc | 5.0-6.0 |
| Bulky | 12 ply, Chunky | 12 | 12-15 sts | 5.5-8.0 | 8-11 sc | 6.0-8.0 |
| Super Bulky | 14+ ply, Roving | 14+ | 6-11 sts | 8.0-12.75 | 5-9 sc | 8.0-12.0 |
* Gauge and needle sizes are guidelines; always swatch for your project.
Yarn Substitution Tips
Check Yardage
Yarn weight categories don't guarantee yardage. Compare meters/grams of the original and substitute yarn to ensure you have enough.
Consider Drape
A DK cotton will drape differently than a DK wool. Think about the finished fabric feel and adjust needle/hook size if needed.
Needle Size Matters
Use the recommended needle size as a starting point, but be prepared to go up or down to achieve the gauge specified in your pattern.