Knitting & Crochet Calculators
Estimate yarn requirements for blankets, garments, and accessories. These calculators work with all standard yarn weights from lace to super bulky.
Always buy one extra skein from the same dye lot. Gauge swatches are your best friend — use our gauge calculator to check your tension before committing to a project.
Latest in Knitting & Crochet
- Crochet Hook Size ChartCalculator ·
- Yarn Substitution CalculatorCalculator ·
- Granny Square CalculatorCalculator ·
Yarn Yardage Calculator
Yarn yardage for knitting and crochet — Craft Yarn Council weights (DK = 8-ply, Worsted = Aran), gauge-based math, plus cable, lace, and seed adjustments.
Knitting Gauge Calculator
Convert knitting and crochet gauge swatch measurements to stitch and row counts — 4-inch / 10-cm Craft Yarn Council convention with ±5% tolerance check.
Blanket Yarn Estimator
Yarn for blankets and throws — fingering to super bulky, baby 30×36 to queen 86×94 sizes, with cable and stitch-pattern adjustments and 10% buffer.
Granny Square Calculator
Plan a crochet granny square blanket — square count, layout, total DC (UK treble) yarn, and join overhead from 3% (join-as-you-go) to 10% (granny stitch).
Yarn Substitution Calculator
Substituting a different yarn weight in a pattern? Estimate the new yardage and balls to buy when you swap worsted for DK, aran for chunky, or back.
Crochet Hook Size Chart
This crochet hook size chart converts between millimetres, US letters and numbers, and the old UK scale, and shows why the same letter varies by brand.