Yarn & Gauge Tools
Free conversion tools for knitters and crocheters — yarn weight, hook size, needle size, and gauge, in US, UK, and metric.
Yarn weight chart
US categories 0-7 with UK/Australian equivalents, gauge, and hook/needle recommendations.
Crochet hook size converter
Metric, US letter/number, and UK/Canadian hook sizes.
Knitting needle size converter
Metric, US, and UK/Canadian needle sizes — US and UK run in opposite directions.
Gauge calculator
Rescale a pattern's stitch or row count to your own measured gauge, with the steps shown.