Crochet Gauge Swatch Calculator

Measure your swatch, compare to pattern gauge, and adjust stitch counts automatically.

Step 1 — Measure Your Swatch

Stitches Counted

Width of Sample (inches)

Rows Counted

Height of Sample (inches)

Step 2 — Compare to Pattern Gauge

Pattern: Stitches per Inch

Pattern: Rows per Inch

Step 3 — Adjust Stitch Count for Your Gauge

Enter the pattern's stitch count and gauges to find the adjusted count for your gauge.

Pattern Stitch Count

Pattern SPI

Your SPI

How to Use

Step 1: Crochet a swatch (at least 4×4 inches). Count stitches across and rows vertically, then enter those numbers with the measured sample dimensions.
Step 2: Enter the gauge listed in your pattern to see how your gauge compares — includes advice on adjusting hook size.
Step 3: Enter the pattern's stitch count, pattern gauge, and your gauge to get the adjusted stitch count that will produce the correct finished size.

Why Gauge Matters

Even a small difference in gauge compounds over many stitches. A swatch that is 10% too loose means a finished blanket could be several inches wider than intended. Always swatch before starting size-sensitive projects like garments.

Results are estimates. Actual results vary by yarn weight, hook size, and personal tension.

About this Crochet Gauge Swatch Calculator

Use this free Crochet Gauge Swatch Calculator to get quick, accurate results directly in your browser. It is designed for everyday use with no signup, no downloads, and no account required. No signup is required, and the tool works on phones, tablets, and desktop browsers.