US vs. UK Crochet Terms: A Side-by-Side Comparison
You find a beautiful pattern online. It's free, it's your skill level, and the photos are exactly what you want to make. You gather your yarn, sit down with your hook, and start following the instructions. By row three, something is clearly wrong. Your stitches don't look like the photos. The fabric is too tall, too loose, or just strangely proportioned. You check your tension, re-read the instructions, and try again. Same result. Then you notice a tiny line buried in the pattern notes: "This pattern uses UK terms."
The US/UK terminology difference has confused and frustrated beginners for as long as crochet patterns have been published internationally. The two systems use identical abbreviations to mean completely different stitches. A pattern written in UK terms that says "dc" is telling you to make what Americans call a single crochet. If you make an American double crochet instead, your project will be twice as tall as intended, use too much yarn, and look nothing like the pattern photo. This guide explains exactly how the two systems differ, provides a clear conversion chart, and gives you foolproof methods for identifying which system any pattern uses.
Why Two Different Systems Exist
The divergence between US and UK crochet terminology has historical roots in how the craft developed differently in each region. In the United States, terminology evolved around the number of yarn overs performed to begin a stitch. A single crochet requires no initial yarn over (you just insert the hook). A double crochet requires one yarn over before inserting the hook. The name reflects the number of loops on the hook or the number of steps involved.
In the United Kingdom, terminology evolved around the number of loops on the hook after the initial insertion. A UK double crochet starts with one loop on the hook, and after inserting and pulling up a loop, you have two loops — hence "double." A UK treble crochet involves pulling through two loops twice — hence "treble." Neither system is more logical than the other. They're just different historical conventions that both persist today.
Australia, New Zealand, and many Commonwealth countries traditionally used UK terminology, though Australian patterns now commonly use US terms or explicitly state which system they follow. European patterns translated into English may use either system depending on the translator. This means you cannot assume which system a pattern uses based on where it was published. You must verify.
The Core Difference: UK Terms Shift Up by One Level
The simplest way to understand the difference is that UK terminology doesn't have a "single crochet." The stitch Americans call single crochet, the British call double crochet. The stitch Americans call double crochet, the British call treble crochet. Everything shifts up by one level of height.
Complete stitch conversion chart:
| US Term | UK Term | Description |
|---|---|---|
| slip stitch (sl st) | slip stitch (sl st) | Same in both systems. Insert hook, yarn over, pull through stitch and loop. |
| chain (ch) | chain (ch) | Same in both systems. Yarn over, pull through loop. |
| single crochet (sc) | double crochet (dc) | Insert hook, yarn over, pull up loop, yarn over, pull through both loops. |
| half double crochet (hdc) | half treble crochet (htr) | Yarn over, insert hook, yarn over, pull up loop, yarn over, pull through all three loops. |
| double crochet (dc) | treble crochet (tr) | Yarn over, insert hook, yarn over, pull up loop, (yarn over, pull through two loops) twice. |
| treble crochet (tr) | double treble crochet (dtr) | Yarn over twice, insert hook, yarn over, pull up loop, (yarn over, pull through two loops) three times. |
| double treble crochet (dtr) | triple treble crochet (trtr) | Yarn over three times, (yarn over, pull through two loops) four times. |
Notice that "single crochet" doesn't exist in UK terminology. If you see the abbreviation "sc" anywhere in a pattern, you're reading US terms. This is the single most reliable indicator. Conversely, if you see "half treble" or "double treble," you're reading UK terms — these stitch names don't exist in the US system.
Beyond Stitch Names: Other Terminology Differences
The US/UK difference extends beyond stitch names to several other common terms:
| US Term | UK Term |
|---|---|
| yarn over (YO) | yarn over hook (YOH) |
| skip | miss |
| gauge | tension |
| bind off | cast off |
| fasten off | fasten off (same) |
| right side / wrong side | right side / wrong side (same) |
The term "tension" in UK patterns means exactly what "gauge" means in US patterns — the number of stitches and rows per inch. It does not refer to how tightly you hold your yarn (though that affects gauge/tension). This can cause confusion because in casual US crochet conversation, "tension" usually means how tightly someone crochets. In a UK pattern, "tension" means the gauge measurement.
How to Identify Which System a Pattern Uses
Most well-written patterns state explicitly near the beginning: "This pattern is written in US terms" or "This pattern uses UK terminology." Look for this statement in the pattern notes, the materials section, or the abbreviation key. If you don't see it, use these detective methods:
Method 1: Look for "single crochet." If the pattern uses the abbreviation "sc" or the words "single crochet," it is US terms. Single crochet does not exist in the UK system. This is definitive.
Method 2: Look for "half treble" or "double treble." If the pattern uses "htr" (half treble crochet) or "dtr" (double treble crochet), it is UK terms. These stitch names don't exist in the US system. This is definitive.
Method 3: Compare stitch names to the photos. If the pattern calls frequent stitches "treble crochet" but the fabric in the photos looks like standard-height stitches (not unusually tall), the pattern is probably UK terms and those "treble" stitches are actually US double crochet. If the pattern calls everything "double crochet" and the fabric looks dense and short, those are probably UK double crochet (US single crochet).
Method 4: Look at the turning chain instructions. If the pattern says to chain 3 for a turning chain and calls that stitch a "treble crochet," it's UK terms (UK treble = US double, which uses chain 3 turning chain). If it says to chain 3 and calls it a "double crochet," it's US terms.
Method 5: Check the designer's location or website. Designers based in the UK, Australia, or New Zealand often use UK terms by default, though many now publish in US terms or offer both versions. This is suggestive but not definitive — always verify using the methods above.
How to Convert a Pattern from One System to the Other
Converting a pattern is straightforward but requires concentration. You must change every stitch reference throughout the entire pattern.
To convert UK to US:
- UK double crochet (dc) becomes US single crochet (sc)
- UK half treble crochet (htr) becomes US half double crochet (hdc)
- UK treble crochet (tr) becomes US double crochet (dc)
- UK double treble crochet (dtr) becomes US treble crochet (tr)
- UK triple treble crochet (trtr) becomes US double treble crochet (dtr)
- "Miss" becomes "skip"
- "Yarn over hook" becomes "yarn over"
- "Tension" becomes "gauge" if referring to the measurement
To convert US to UK: Reverse all of the above.
Practical conversion method:
- Print the pattern or work from a digital copy you can mark up.
- Go through the entire pattern and highlight every stitch abbreviation.
- Using the conversion chart, write the converted abbreviation above each highlighted term.
- Also convert any "skip" to "miss" or vice versa.
- Double-check that you've converted every instance. Missing one "dc" in a long pattern will throw off that entire section.
- Work from your converted copy, not the original.
What Happens When You Use the Wrong System
Crocheting a UK pattern with US stitches (or vice versa) produces dramatic and obvious errors very quickly. Understanding what these errors look like helps you diagnose the problem.
If you accidentally use US terms for a UK pattern:
- Where the pattern says "dc" (UK double crochet = US single crochet), you work a US double crochet instead. Your stitches are twice as tall as intended.
- The fabric will be much taller and more open than the pattern photos. It will feel loose and drapey when it should be firm, or lacy when it should be solid.
- Your project will use significantly more yarn than the pattern specifies because taller stitches consume more yarn.
- The finished dimensions will be completely wrong — a scarf might be 12 inches wide instead of 6, a hat might be enormous.
- You'll notice within a few rows that something is off. The fabric won't match the photos.
If you accidentally use UK terms for a US pattern:
- Where the pattern says "sc" (US single crochet — but wait, UK doesn't have sc, so this tells you it's US terms), if you somehow misinterpret and use UK equivalents, your stitches will be too short.
- Where the pattern says "dc," you work a UK double crochet (US single crochet) instead of a US double crochet. The fabric will be dense and short.
- Your project won't grow in height as expected. A piece that should be 12 inches long might only reach 7 or 8 inches.
- The fabric will be much stiffer and tighter than intended.
If you realize mid-project that you've used the wrong system, there's no fix except starting over. The stitch structure is fundamentally wrong. Consider it a learning experience, convert the pattern properly, and begin again. The sooner you catch the error, the less work you lose.
Online Patterns and the US/UK Confusion
The internet has made crochet patterns globally accessible, which is wonderful and also the source of endless terminology confusion. A free pattern on a blog might be written by a UK designer using UK terms with no clear label, while a pattern on Ravelry might be from an Australian designer who switched to US terms because most of their audience is American. You can't rely on the website's domain (.co.uk vs .com) as an indicator.
Tips for navigating online patterns:
- Read the pattern comments or project notes on Ravelry. Other crocheters often mention whether they had terminology issues.
- If the pattern doesn't specify, message the designer or leave a comment asking which system they use.
- Many designers now include both US and UK versions in the same PDF or offer separate downloads.
- When in doubt, use the detective methods above. Look for "sc" (US) or "htr" (UK).
A Quick Reference Card
Print this or save it to your phone for craft store and pattern-reading reference:
- US sc = UK dc (the most important conversion to remember)
- US hdc = UK htr
- US dc = UK tr
- US tr = UK dtr
- US skip = UK miss
- US gauge = UK tension
- Slip stitch and chain are the same in both systems.
If you see "sc," it's US terms. If you see "htr," it's UK terms. Those two stitches are unique to their respective systems and serve as immediate identifiers.
For patterns written in clear US terminology ideal for beginners, the free crochet patterns for beginners collection uses US terms throughout. The what a crochet stitch actually looks like guide uses US terminology to describe stitch anatomy.
