When you find a knitting pattern you really love, but you want to work it in crochet, you are faced with a challenge. Knit and crochet stitches are not exactly interchangeable and technically cannot be converted. Nevertheless, you can replace stitches to give the crochet pattern a similar look as the knit pattern if the pattern is not too complex. There may be some experimentation involved to get the desired look, but a few general guidelines will assist you in crocheting a simple end product that, although not identical, may strongly resemble the original pattern.
Allot 30 per cent more yarn when converting a knit pattern to a crochet pattern.
Experiment with gauge to determine what size crochet hook and yarn will give you the same number of stitches per inch as the knitting pattern requires. Repeatedly check that your project is the correct size, especially if you are crocheting clothing.
Divide the required number of knitting rows in half throughout the pattern, since crochet stitches are generally twice the height of knit stitches.
Replace the number of cast-on stitches in your knit pattern with an equivalent number of crocheted chain stitches. Do not include the original slip stitch or the stitch on the crochet hook when counting stitches.
Work one row of single crochet stitches for every two rows of knit, two rows of purl or one row each of purl and knit.
Substitute a single row of half-double crochet stitches for three rows of knit, purl or a combination of knit and purl.
Use a row of double crochet to replace four rows of knit, purl or a combination and use a row of treble crochet to replace six rows.
Create ribbing by replacing the knit 1, purl 1 pattern with crochet stitches worked in the back loops of each row.
Search a stitch finder, such as the one offered by Lion Brand, to locate unusual or complex stitches in your knitting pattern, and find a crochet replacement that looks similar.