Tools
Crochet Hook Size Chart (mm, US and UK)
Crochet hook size chart converting millimeters, US letter/number sizes and old UK sizes, plus which hook to use for each yarn weight and why mm matters most.
Crochet Tools & Charts
Reference charts and calculators that work in your browser.
3 guides
Tools
US to UK Crochet Terms Conversion Chart
Convert US and UK crochet terms instantly. UK names shift one stitch up: US single crochet is UK double crochet. Learn how to tell which terms a pattern uses.
Tools
Crochet Gauge Calculator
Use this crochet gauge calculator to compare your swatch with a pattern, work out how many stitches you need, and know whether to change hook size.