crochet.guide
Tools/Gauge

Crochet gauge calculator

Check stitch and row tension separately. See what the pattern would measure at your gauge, or plan a simple rectangle.

Example measurements are filled in. Replace them with your swatch and pattern.

Changing units converts your dimensions; 4 inches is 10.16 cm.
Your swatch

Count stitches and rows inside the swatch, away from the edges. Measure that same area.

Pattern gauge

Copy the crochet gauge from your pattern. Enter the counts for a 10 cm square.

Finished project size

Use the finished width and height you want. The rectangle count does not include edge stitches or turning chains.

Use 1 for plain stitches. For a six-stitch repeat, enter 6.

Example: the pattern would measure

35.56 × 36 cm

A pattern planned for 40 × 40 cm would come out smaller.

You have more stitches and rows per 10 cm than the pattern. Try a larger hook and swatch again.

For a simple 40 × 40 cm rectangle at this gauge: 72 stitches and 80 rows, before any edge or turning chains.

Read the result before changing the pattern

The first result preserves the pattern's intended stitch and row counts. Finished width = planned width × pattern stitch density ÷ your stitch density. Height uses the same calculation with rows.

The rectangle count does a different job: desired width × your stitch density, rounded to the nearest whole repeat. Desired height × your row density gives the nearest whole row. Add any edge stitches and turning chains required by your stitch pattern yourself. This is not a garment-grading tool.

Why there is no exact new hook size

Hook diameter and stitch size do not change in a fixed proportion. Your grip, yarn and stitch all matter. More stitches in the same space means smaller stitches, so a larger hook is a reasonable next trial. Re-measure both directions. When one direction matches and the other does not, changing the hook may disturb the matching direction.

Learn how to make and measure a gauge swatch →

CYC gauge and hook guidance