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Crafts & Hobbies Calculators & Converters

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Seven reference tools for makers, sewers, and DIY enthusiasts: a yarn weight chart covering all Craft Yarn Council CYC categories with ply, WPI, and needle/hook sizes; knitting needle and crochet hook size charts spanning US, metric, and old UK/Canadian systems; a fabric yardage calculator that accounts for seam allowance and fabric width; a seed bead aught-size chart with mm diameters and per-gram counts; a unified drill bit size chart covering fractional, metric, wire gauge, and letter systems; and a sandpaper grit equivalents table comparing CAMI, FEPA, and JIS standards. All charts are interactive — click any row to highlight it for easy cross-referencing.

All Crafts & Hobbies Tools

Yarn Weight Converter — Lace to Jumbo, Ply & WPI Chart

Convert yarn weight categories (lace to jumbo) to ply count, WPI, and needle/hook size. Based on Craft Yarn Council CYC standards.

Knitting Needle Size Chart — US, Metric, UK Conversion

Convert knitting needle sizes between US numbers, metric mm, and old UK/Canadian sizes. Covers all standard sizes from 2.0 mm to 25 mm.

Crochet Hook Size Chart — US Letters, Metric, UK Conversion

Convert crochet hook sizes between US letter labels, metric mm, and old UK/Canadian sizes. From B-1 (2.25 mm) to P/Q (15 mm).

Fabric Yardage Calculator — Pieces, Seam Allowance, Fabric Width

Calculate how many yards (or meters) of fabric you need. Enter piece dimensions, seam allowance, number of pieces, and fabric width.

Bead Size Chart — Seed Bead Aught Sizes to mm

Convert seed bead aught sizes (15/0 to 6/0) to mm diameter. Includes beads-per-gram estimates for budgeting projects.

Drill Bit Size Chart — Fractional, Metric, Wire Gauge, Letter

Look up drill bit sizes across all four systems: fractional inches, metric mm, wire gauge numbers, and letter sizes. From 0.35 mm to 25 mm.

Sandpaper Grit Chart — CAMI, FEPA, JIS Equivalents

Compare sandpaper grit numbers across CAMI (US), FEPA (EU P-grades), and JIS (Japanese) standards. From grit 40 to 3000.

Reference Charts

Knitting Needle & Crochet Hook Size Chart

US, metric (mm), and UK knitting needle sizes plus US and metric crochet hook sizes — with yarn weight recommendations. Sourced from Craft Yarn Council standards.