Free Crochet Gauge Converter for Any Hook or Yarn

Enter a matching number for both pattern and my row gauge — this will leave the row count unchanged and only convert the stitch count. Then measure your actual row gauge from the swatch and run the conversion again for the full adjustment.

Round the adjusted count up or down to the nearest multiple of your repeat. Then check how much that changes the finished width by dividing the rounded count by your stitches per inch.

The math is the same. This converter works for any stitch-based craft where finished size depends on gauge, including knitting. For a dedicated knitting calculator see the Knitting Gauge Calculator.

Swatch gauge measured from your actual crocheted fabric with your chosen hook. Label gauge is a guideline for hook selection, not a guarantee of what you will achieve.

Crochet a swatch at least 15 × 15 cm in the pattern stitch, wash and block it the way the finished item will live, then count stitches and rows across the middle 10 cm — never at the edges, where tension is distorted. Half stitches count: 15.5 stitches per 10 cm is a different gauge than 15.

Over a small motif, no. Over a garment or blanket, yes: being off by 1 stitch per 10 cm across a 150 cm blanket is a 15-stitch drift — roughly 9 cm of unplanned width. The larger the project, the more a small gauge error compounds.

Try hook size first: going up or down half a millimeter usually shifts gauge by about one stitch per 10 cm. Convert the counts instead when you already like the fabric your hook and yarn produce and changing hooks would make it too stiff or too loose.