Source-backed craft reference

Make the math
fit the craft.

Clear size charts, careful conversions, and working calculators for crochet, knitting, cross-stitch, and quilting.

Open a calculator Browse size charts

Pattern gauge and manufacturer labeling always take priority. Swatch before committing materials.

Start with the task

One careful answer at a time.

How we verify measurements
Hook & needle sizes
Compare metric, US, and UK labels without losing your place in a pattern.
Use this guide
Yarn weight guide
Understand standard categories, common names, and where labels can differ.
Use this guide
Gauge calculators
Resize stitch and row counts from a measured swatch or pattern gauge.
Use this guide
Cross-stitch sizing
Turn stitch counts and fabric count into a finished design and cut size.
Use this guide

Built for careful makers

Standards where standards exist. Clear labels where they do not.

Every factual page links to its underlying source, separates formal standards from common guidance, and puts the important caveat next to the number—not in the fine print.

Read our source policy

From chart to project

Start with the measurement you have.

Look up a tool diameter, compare yarn categories, or turn a measured swatch into the stitch count your project needs.

Find a chart or calculator