Crochet Chart Symbols

Stitch charts in crochet and knit patterns are being used more and more as an addition to or in place of words to describe a pattern stitch. Following are the standardized crochet symbols that have been adopted by members of the Craft Yarn Council and are considered to be the clearest and easiest to render and to read. For the most part each symbol represents a stitch as it looks on the right side of the work. Always refer to the pattern key for additional symbol definitions. Link to downloadable pdf pdf 

Symbol Stitch
chain (ch)
slip stitch (sl st)
or single crochet (sc)*
half double crochet (hdc)
double crochet (dc)
treble crochet (tr)
double treble crochet (dtr)
sc2tog
sc3tog
dc2tog
dc3tog
3-dc cluster
3-hdc cluster/puff st/bobble
5-dc popcorn
5-dc shell
ch-3 picot
front post dc (FPdc)
back post dc (BPdc)
worked in back loop only**
worked in front loop only*

*Both symbols are commonly used for single crochet 
**Symbol appears at base of stitch being worked