This app assists in the conversion of knitting needles and crochet hooks from metric, UK and US so you know the correct size to purchase.
Knitting Wool Calculator
Figure out how much yarn you need to buy via this app’s knitting calculator.
This app lets you figure how much yarn you will need given pattern requirements for your knitting project.
Figure out how many skeins of yarn you will need and the cost with the help of this app. Also listed are top yarns by weight category.