Free Knitting & Crochet Calculators
Running out of yarn mid-project or casting on the wrong number of stitches wastes hours of work. These calculators handle the math for yarn yardage, stitch counts, gauge conversion, hook and needle sizing, blanket dimensions, and more — so you can focus on the craft, not the arithmetic.
Knitting & Crochet Calculators
Yarn Yardage Calculator
Calculate how much yarn you need for any project — scarves, hats, sweaters, blankets, and socks. Supports all yarn weights from lace to super bulky.
Knitting Stitch Calculator
Calculate how many stitches to cast on and rows to knit. Enter gauge and project dimensions for instant results with presets for scarves, blankets, and more.
Knitting Gauge Calculator
Calculate your stitches per inch, rows per inch, and total stitches/rows needed for any project from your swatch measurements.
Crochet Chain Calculator
Calculate foundation chain length for any crochet project. Enter width and gauge — get chain count with turning chain for sc, hdc, dc, or tr.
Crochet Hook Size Converter
Convert crochet hook sizes between US letter, US number, and metric (mm) systems. Complete reference chart included.
Crochet Blanket Size Calculator
Calculate how much yarn you need for a crochet blanket. Get total stitches, rows, yardage, and number of skeins for any blanket size.
Granny Square Calculator
Calculate how many granny squares you need for a blanket. Get rows, columns, yarn per square, and total yarn estimate with common size presets.
Hat Size Calculator
Calculate cast-on stitches, hat height, and crown decreases for any head size. Presets for baby through adult with all yarn weights.
Knitting Needle Size Converter
Convert knitting needle sizes between US, UK, and metric (mm) systems. Complete chart with recommended yarn weights for every needle size.
Yarn Weight Converter
Convert yarn weights between US, UK, Australian, and WPI systems. Includes needle/hook sizes, gauge range, and yardage per 100g.
Knitting & Crochet Guides
Yarn Weight Guide: Categories, Gauge & Needle Sizes
Complete guide to yarn weight categories from lace to super bulky, with gauge ranges and recommended needle sizes.
How Much Yarn for a Blanket? Yardage by Size & Weight
Yardage estimates for blankets in every size from baby to king, broken down by yarn weight.
Knitting Needle Size Chart: US, UK & Metric
Full needle size conversion chart between US, UK, and metric systems with recommended yarn weights.
Knitting Gauge Explained: Why It Matters
What gauge is, how to measure a swatch, and how to adjust when your gauge doesn't match the pattern.
Crochet Hook Sizes Guide: US, UK & Metric
Complete crochet hook size conversion between US letter, US number, UK, and metric systems.
Crochet Blanket Sizes: Dimensions for Every Bed
Standard crochet blanket dimensions from baby to king, with yarn estimates for each size.