KNITTING & CROCHET SIZING TOOLS

Make every
stitch fit.

Convert hook and needle sizes, calculate gauge, and plan finished dimensions with clear assumptions and no sign-up.

✓ Free to use ✓ Works in your browser ✓ No account

FEATURED TOOL

Crochet hook size converter

Use the millimetre marking as the most reliable physical measurement. US letters and numbers can vary slightly between manufacturers.

Metric hook size

Choose the size printed on your hook or pattern.

Closest common US label

H-8

5 mm

Always check the millimetre marking when precision matters.

Knitting gauge calculator

Turn a measured swatch into the stitch count your project needs.

Calculate gauge →

Stitch multiple calculator

Fit the result to a pattern repeat and optional edge stitches.

Fit a repeat →

Blanket size planner

Use any target width with your own measured gauge.

Plan a width →

GAUGE WORKSPACE

From swatch to stitch count

Enter what you measured, choose the finished width, then optionally fit the answer to your pattern repeat.

Stitches in your swatchMeasured swatch widthcmTarget finished widthcm

Pattern repeatEdge stitches

Repeat-compatible result

106

stitches

Raw calculation105.6Nearest whole stitch106Fits 4-stitch repeat + 2 edge106

Formula: 22 ÷ 10 × 48. Work a fresh swatch after changing yarn, hook, needle or stitch pattern.

BUILT FOR REAL PATTERNS

Regional labels are useful.
Millimetres are definitive.

StitchMeasure keeps the physical measurement visible, explains ambiguous labels, and shows the formula behind each result. It is an independent reference, not a manufacturer or standards body.