Tools
Crochet Gauge Converter: Adapt Any Pattern to Your Tension
Enter the pattern gauge and your own swatch. Scenario A tells you how many stitches to chain and rows to work; scenario B shows how much bigger or smaller the piece will be if you follow the pattern unchanged.
Free · No sign-up · Runs in your browser
How it works: the math behind the tool
Gauge is converted into densities: stitches per centimeter (stitches ÷ swatch width) and rows per centimeter (rows ÷ swatch height).
Scenario A: the target width is the pattern stitches ÷ the pattern stitch density, and the stitches to chain are that width × your stitch density. The result is rounded to the closest number that fits the stitch multiple (X × k + Y), and the two neighbouring valid options are shown with the width each one gives. Rows are recalculated the same way with the row densities.
Stitches to chain = pattern stitches × (your sts per cm ÷ pattern sts per cm), rounded to X × k + Y
Scenario B: if you keep the pattern numbers, your width is the pattern width × (pattern stitch density ÷ your stitch density); the length uses the row densities. The change in surface is the product of both.
The hook suggestion (about 0.5 mm for every 7 % of difference in stitch gauge) is only a starting point: always crochet a new swatch to confirm it.
Last updated: November 3, 2026
Frequently asked questions
What is gauge in crochet?
Gauge is how many stitches and rows fit in a given size, usually 10 × 10 cm (4 × 4 in). Two people with the same yarn and hook can get different gauges, which changes the size of the finished piece.
My swatch has fewer stitches than the pattern. What does that mean?
Your stitches are larger, so your tension is looser. If you follow the pattern as written, your piece will come out bigger. Use a smaller hook or recalculate the stitch count with scenario A.
How do I adapt a pattern that needs a stitch multiple?
Enter the multiple, for example 4 + 3. The converter rounds the foundation chain to the closest valid number and shows the width you will get with the nearest smaller and larger options.
Should I measure gauge before or after blocking?
After washing and blocking the swatch the same way you will treat the finished piece, especially with cotton and natural fibers, which can relax or shrink.