Knitting & Crochet Calculators

Free tools to help you knit and crochet with confidence

Gauge Calculator

Convert swatch measurements to stitches and rows per 10cm or 4 inches

Adjust stitch and row counts when your gauge differs from the pattern

Estimate how much yarn you need for your project by type, size, and weight

Estimate remaining yarn length by weighing your ball on a kitchen scale

Calculate how many skeins of a substitute yarn you need for your pattern

Convert between US, UK, and metric knitting needle or crochet hook sizes

Generate even, random, or gradient stripe arrangements with a visual preview

Space increases or decreases evenly across a row for shaping

Calculate decrease intervals to taper a sleeve from upper arm to wrist

Plan your granny square blanket: calculate squares needed and estimate yarn yardage by color

Calculate cast-on stitches for a hat using head circumference and gauge

Find the right cast-on count for socks using foot circumference and gauge

Get starting stitches or chains for a blanket at any target size

Plan a corner-to-corner crochet blanket — blocks wide, tall, and total diagonal rows

Calculate body, sleeve, and armhole stitch counts for any sweater size using your gauge

Calculate cast-on stitches for knitting in the round from circumference and gauge

Generate an Intarsia or Fair Isle dot matrix chart with color counts and float warnings

Estimate how many hours and weeks your knitting project will take

Calculate relaxed and stretched width of 1×1, 2×2, or 3×1 ribbing