Why your stitch gauge changes the picture

Measure stitches and rows separately to preserve the proportions.

A square on screen is not always square in yarn

Single crochet dimensions vary with yarn, hook, tension and technique. A chart drawn on square cells can look taller or wider in the finished fabric. Do not assume that a universal stitch ratio will match your own work.

Measure a representative swatch

Work a swatch with the yarn, hook and color-carrying method you intend to use. Finish or block it as you intend to finish the project. Count stitches across and rows down over the same measured length, away from the edges. Enter both measurements in the calculator.

Calculate stitches and rows separately

For a target width of 40 cm at 16 stitches per 10 cm, you need 64 stitches. For a target height of 40 cm at 18 rows per 10 cm, you need 72 rows. A 64 × 72 chart can therefore make a physically square panel. The numbers are an example, not a recommended gauge.

Photo conversion and proportions

If you want to preserve a source image, its width-to-height ratio must be combined with both gauge measurements. Choosing a width fixes the approximate finished width; the needed rows depend on the image height and the row-to-stitch gauge ratio. Review small details after resizing.

Check before you buy more yarn

Calculated dimensions are estimates. Tension may change across a large piece, and carrying colors can affect both fabric and yarn use. Stitch counts alone are not an accurate shopping list. Test the chart at a small scale and measure the result.

Put this guide into practice

Create a chart from your own image, then adjust the colors, gauge and reading direction before you start stitching.

Tapestry crochet pattern maker