Prym's stitch calculator is an essential tool for knitting clothes. It can help and convert the desired amount of stitches and rows for any desired garment size and yarn thickness. First, the amount of stitches and rows per 10 cm is calculated using the measuring frame. The knitting calculator slider can then be set to the calculated value on a scale from 8 to 49 stitches per 10 cm. A viewing window directly shows the stitch and row number for lengths from 1 cm to 100 cm.