Guides · Crochet
US vs UK crochet terms: the one-rung shift
A pattern tells you to work a row of dc. If the pattern is American, that's a double crochet — a tall stitch. If it's British, dc means double crochet too, but a British double crochet is the short stitch Americans call a single crochet. Same two letters, different stitch, different fabric. This is the most expensive misunderstanding in crochet, and it is entirely avoidable once you can see the shift.
Why there are two systems
British and American crochet terminology developed separately, and for stitches taller than a single crochet the names sit one rung apart: each American stitch takes the name of the British stitch one step shorter. Only two stitches escape the shift — the chain and the slip stitch mean the same thing on both sides of the Atlantic. Everything from single crochet upward moves.
The Craft Yarn Council publishes patterns in US terms, and most large US publishers follow it. UK, Australian and many translated European patterns use UK terms. Neither system is wrong. The damage happens when a crocheter doesn't know which one they're holding.
The conversion table
| US term | US abbreviation | UK term | UK abbreviation |
|---|---|---|---|
| chain | ch | chain | ch |
| slip stitch | sl st | slip stitch | ss |
| single crochet | sc | double crochet | dc |
| half double crochet | hdc | half treble | htr |
| double crochet | dc | treble | tr |
| treble crochet | tr | double treble | dtr |
| double treble | dtr | triple treble | trtr |
Read it as a ladder. A US single crochet is a UK double crochet. A US double crochet is a UK treble. If a UK pattern asks for a treble and you work an American treble, every stitch comes out a full rung too tall — the piece grows faster than the pattern intends and drinks more yarn than it should.
The dangerous abbreviation
Most abbreviations are at least consistent within a system. dc is not. It is the one abbreviation that names two different stitches depending on where the pattern was written, which makes it the single most common cause of the mid-project realisation that something is off. When a pattern is sloppy about declaring its terms, dc is where it will hurt you.
Telling which system a pattern uses
Before row 1, run through these checks. They take a minute and save a project.
- Look for "single crochet". UK terminology has no single crochet at all. If the pattern uses sc, it's US. If it never does, be suspicious.
- Look for "half treble". That term exists only in UK patterns; its presence settles the question.
- Check the turning chain. A row of the pattern's "dc" that turns with 3 chains matches US double crochet; UK dc (the short stitch) usually turns with 1 chain.
- Check the words around the craft. UK patterns usually say tension where US patterns say gauge, and the publisher's home country is a strong clue.
- Read the abbreviations list. Decent patterns print one. If the list defines dc as "double crochet" and also lists a treble, you are reading UK terms.
Converting a pattern you love
If the pattern is written in the other system from the one you think in, don't translate stitch-by-stitch in your head as you work — that's how a treble slips through at row 40. Instead, take ten minutes up front: print or copy the abbreviations list, write the equivalent from your system beside each term, and mark the pattern itself wherever the dangerous abbreviations (dc, tr, dtr) appear. Then work from your annotations. A stitch dictionary written in both systems, kept with the pattern, beats memory every time.
One more trap: yarn weight names travel even worse than stitch names. "DK" is a standard term in the UK and means little in the US; "worsted" is the reverse. When a pattern names a weight, check the number (the Craft Yarn Council's 0–7 scale) and the gauge, not the word.