Gauge calculator
From your swatch measurements to estimated stitch and row counts for a target size.
Your swatch / pattern gauge
Enter what you measured or what the pattern states (same units for width and height).
Target finished size
Estimate
- Stitches per inch
- 5.000
- Rows per inch
- 6.000
- Starting chain / stitch count (width)
- ~200 sts
- Approx. rows (height)
- ~300 rows
Rounded to whole stitches/rows. Real fabric stretches; always block your swatch and compare to the pattern schematic.
Scaling a pattern to a new size? Try the pattern grading calculator.
Gauge is how many stitches and rows fit in a measured span of fabric. Patterns quote gauge so your finished piece matches the designer’s size. If your swatch is tighter or looser, stitch counts change—and that’s where a crochet gauge calculator helps.
Enter the stitches and rows you counted over a known width and height (usually from a blocked swatch), then set the finished size you want. OpenCrochet converts that into stitches per inch, rows per inch, and a starting chain / row estimate you can use when planning blankets, garments, or amigurumi panels.
How to use this gauge calculator
- Crochet a swatch in the stitch pattern you’ll use (or read gauge from the pattern). Block it the same way you will block the project.
- Count stitches across a measured width and rows across a measured height. Keep width and height in the same units (inches in this tool).
- Enter those four numbers, then your target finished width and height.
- Use the estimated stitch and row totals as a planning guide—always check against a schematic and adjust for ease, borders, or shaping.
Tips for accurate crochet gauge
- Measure in the center of the swatch, not the edges, and avoid stretching the fabric while counting.
- Match yarn weight and hook to the pattern, then change hook size if your gauge is off before rewriting stitch counts.
- For garments, combine this tool with pattern grading when you need to scale an existing size chart.
Frequently asked questions
- Do I need an account to use the gauge calculator?
- No. This free tool runs in the browser with no sign-up required.
- Why doesn’t my finished size match the estimate?
- Fabric stretches, borders add width, and some stitch patterns draw in. Treat the numbers as a starting plan, then check a schematic or second swatch.
- Can I use centimeters?
- This calculator is inch-based. Convert cm to inches (divide by 2.54) before entering measurements, or keep all inputs in inches consistently.
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