Crochet Tools
Handy free calculators and charts for every project — bookmark these for your next make.
Hook size converter
Convert crochet hook sizes between metric (mm), US and vintage UK.
Open tool →Yarn weight chart
Lace to jumbo — names, recommended hooks and gauge for every weight.
Open tool →Gauge calculator
Check your tension against a pattern and work out starting stitch counts.
Open tool →Yardage calculator
Work out how many balls of yarn you need, and convert metres ↔ yards.
Open tool →Abbreviations
US and UK crochet terms and abbreviations, side by side.
Open tool →