Guides
Guides
In-depth reading to go with the calculator.
How to Read a Yarn Label
Weight symbol, gauge, needle size, yardage, dye lot, and care icons — explained.
What Is WPI, and How Do You Measure It?
Identify an unlabeled yarn's weight by measuring wraps per inch.
Substituting Yarn Weights: A Complete Guide
A worked example for gauge matching and yardage math when swapping yarns.
Crochet Thread Numbers Explained
Why thread sizing runs backwards from yarn weight, from Size 3 to Size 80.