Sums, done
Knitting tools
The arithmetic from the guides, as calculators: how much yarn, what gauge, which size. Free, no sign-in, and every number traces to the guide it came from.
Yardage estimator
How many yards a sweater, blanket, hat, scarf, cowl, mittens, socks, shawl or baby cardigan takes at each yarn weight, and how many skeins that is.
Open the tool →Gauge calculator
Your stitches and rows per inch from a swatch, how many needle sizes to move to hit a pattern's gauge, and the cast-on for any width at your gauge.
Open the tool →Needle and hook size converter
US, millimeter and old UK knitting needle sizes, crochet hook letters and steel hook numbers, with a lookup that takes a size written any way.
Open the tool →Every yarn page on the site also carries a calculator pre-filled with that yarn's yardage, which turns a pattern's total into skeins in one step.