Do the yarn math before you cast on.
Calculators and charts for knitting and crochet. Type your numbers and get instructions you can follow, with the arithmetic shown.
Try it: spread increases or decreases evenly
Open the full calculator for rounds, kfb increases and a stitch map of the row.
Calculators
- Increase and decrease evenly calculator
Spread increases or decreases across a row or round and get the written instructions.
- Gauge calculator
Stitches to cast on for any width, or what size a pattern comes out at with your gauge.
- Blanket yarn calculator
How many skeins to buy for a blanket, worked out from a weighed swatch.
- Starting chain calculator
How many chains to make for a crochet blanket or scarf of any width.
Charts
- Yarn weight chart
Weights 0 to 7 with typical gauge, needle sizes and hook sizes.
- Knitting needle size chart
Every common needle size in millimeters and US numbers.
- Crochet hook size chart
Regular crochet hooks in millimeters and US letter sizes.
- US vs UK crochet terms
Convert stitch names between US and UK patterns, and spot which one you have.
- Hat size chart for knitting and crochet
Head circumference by age, from preemie to adult, in inches and cm.
- Knitting abbreviations
Common knitting pattern abbreviations explained, grouped by type.
- Crochet abbreviations
Common crochet pattern abbreviations explained, in US terms.