Here is a handy chart to help you to convert UK crochet terms to US and vice versa. And I wrote a blog post about differences here: British vs. American Crochet Terms: What’s the Difference?
| UK Terms | US Terms |
| Double Crochet (dc) | Single Crochet (sc) |
| Half Treble (htr) | Half Double Crochet (hdc) |
| Treble (tr) | Double Crochet (dc) |
| Double treble (dtr) | Treble (tr) |
| Triple treble (ttr) | Double treble (dtr) |