Crochet tools
Calculators that do the maths for you
Plan blankets, check gauge, estimate yarn and convert pattern terms — free, private and running entirely in your browser.
Yarn Quantity EstimatorEstimate how much yarn a project needs by weighing and measuring a small swatch.Open tool 
Blanket Size CalculatorTurn a blanket size and your gauge into a starting chain and approximate row count.Open tool 
Granny Square CalculatorWork out how many squares you need — and how to lay them out — for any blanket size.Open tool 
Gauge CalculatorCompare your gauge with a pattern’s and see how it will change the finished size.Open tool 
Yarn Substitution CalculatorSwap one yarn for another by comparing yardage per skein and total length needed.Open tool 
US ↔ UK Crochet Terms ConverterPaste instructions and convert stitch names between US and UK crochet terms.Open tool