Originally Posted by krazy4kats
is there a way to "convert" a pattern for different weight yarn, or am i treading in troubled waters with that thought? valerie
It's just math, however, before you do it, give careful consideration to whether the increased bulk's effect on the drape of the fabric might spoil the look.
Anyway, you start by kniiting a good size sample of the yarn you want at the size needles you want. Measure stitch and row gauge.
Divide every mentioned number of stitches or rows by the pattern's gauge. Then multiply the result by your gauge.
Say the pattern is written for 5 stitches 7 rows to the inch. You're getting 3 stitches and 4 rows to the inch.
Pattern says cast on 100 stitches. 100/5 = 20 inches. 20 * 3 = 60 stitches in the bulkier weight yarn.
Pattern says decrease 1 stitch on either side every other row for 14 rows.
That's 14 decreases per side / 5 = close enough to 3 inches * 3 = 9 decreases per side. 14 rows / 7 = 2 inches * 4 = 8 rows. So you'll decrease a stitch on every row for 9 rows (or every row for 8 then k2tog)
You have to do this for every single measurement in the pattern. You have to check, double check, and triple check your math. Screw up a number, and you may knit a camel instead of a sweater!