US to UK Crochet Terms Conversion Chart (or UK to US)

What are Crochet Terms?

Crochet terms (or crochet terminology) refer to names of the stitches, techniques and instructions that are used in a pattern.

While the result of the pattern may be exactly the same, the names of stitches, techniques and instructions may be completely different based on what terminology the designer has used.

There are two standard English crochet terminologies: US crochet terminology and UK crochet terminology. Each has its own name for stitches, techniques and instructions.

UK vs US Crochet Terms

Even though both the US and the UK are English-speaking nations, there are terms/words that mean the same thing but are very different. For example, in the UK, a very popular sport is called “football” whereas, in the UK, that same sport is called “soccer.” Other examples of two different words that mean the same thing include chips/fries, a lift/elevator and a flat/apartment.

Just as British English and American English can differ in some areas, there are differences between UK crochet terms and US crochet terms.

In this guide to UK and US crochet terms, we will cover what each term means and how to convert terms into either UK terminology or US terminology.

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US to UK Crochet Terms Conversion Chart

Here is a US-to-UK crochet term conversion chart outlining all the differences between US and UK terms. Explanations of each crochet term are below.

US Crochet Term	UK Crochet Term
yarn over (yo)	yarn over hook (yoh)
skip (sk)	miss
gauge	tension
chain (ch)	chain (ch)
slip stitch (sl st)	slip stitch (sl st or ss)
single crochet (sc)	double crochet (dc)
half double crochet (hdc)	half treble (htr)
double crochet (dc)	treble (tr)
triple/treble crochet (tr)	double treble (dtr)
double triple/treble (dtr)	triple treble (trtr)
front post single crochet (FPsc)	raised double crochet front (RdcF)
back post single crochet (BPsc)	raised double crochet back (RdcB)
front post double crochet (FPdc)	raised treble front (RtrF)
back post double crochet (BPdc)	raised treble back (RtrB)
front post triple crochet (FPtr)	raised double treble front (RdtrF)
back post triple crochet (BPtr)	raised double treble back (RdrtrB)
single crochet two together (sc2tog)	double crochet two together (dc2tog)
double crochet two together (dc2tog)	treble crochet two together (tr2tog)
triple crochet two together (tr2tog)	double treble two together (dtr2tog)

US and UK Crochet Terms Explained

Yarn Over (US) and Yarn Over Hook (UK)

Yarn over (yo) in US terms is the same technique as yarn over hook (yoh) in UK terms. Both terms refer to the process of bringing your hook under the yarn, allowing it to fall on the hook’s shaft/working area. 

Skip (US) and Miss (UK)

Skip (sk) in US terms is the same as “miss” in UK terms (it is not usually abbreviated). Both terms mean to not work into the next stitch – you will skip/miss it and work into the following stitch.

Gauge (US) and Tension (UK)

Gauge in US terms is the same as tension in UK terms. Both terms refer to the number of stitches and rows/rounds that should be in a specified area. Read my complete Guide to Gauge/Tension.

Chain (US and UK)

A chain (ch) stitch is the same in US and UK terms. To make a chain (ch) stitch, yarn over and pull the yarn through the loop on your hook.

Slip Stitch (US and UK)

A slip stitch (sl st) is the same in US and UK terms. Some UK patterns use “ss” as the abbreviation. To make a slip stitch (sl st or ss), insert your hook into the designated stitch. Yarn over, pull up a loop and pull it through the loop on your hook. 

Single Crochet (US) and Double Crochet (UK)

There is no single crochet (sc) stitch in UK crochet terms. If you see a single crochet stitch in a pattern, you will know it is written in US terminology. In UK terms, this same stitch is called a double crochet (dc).

Here’s how to make this stitch (sc in US terms and dc in UK terms): insert your hook into the designated stitch. Yarn over and pull through a loop (2 loops on hook). Yarn over and pull the yarn through the two loops on your hook.

Half Double Crochet (US) and Half Treble (UK)

A half double crochet (hdc) stitch in US terms is the same stitch as a half treble (htr) stitch in UK terms. To make this stitch, yarn over and insert your hook into the designated stitch. Yarn over and pull through a loop (3 loops on hook). Yarn over and pull the yarn through the three loops on your hook. 

Double Crochet (US) and Treble (UK)

A double crochet (dc) stitch in US terms is the same stitch as a treble (tr) stitch in UK terms. Here’s how to make this stitch: yarn over and insert your hook into the designated stitch. Yarn over and pull through a loop (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook – not the loop closest to you (2 loops on hook). Yarn over and pull the yarn through the two loops on your hook. 

Triple Crochet (US) and Double Treble (UK)

A triple (also called treble) crochet (tr) stitch in US terms is the same stitch as a double treble (tr) stitch in UK terms. To make this stitch, yarn over twice and insert your hook into the designated stitch. Yarn over and pull through a loop (4 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on how). Yarn over and pull the yarn through the two loops on your hook. 

Double Triple/Treble (US) and Triple Treble (UK)

A double triple/treble (dtr) stitch in US terms is the same as a triple treble (trtr) stitch in UK terms. To make this stitch, yarn over three times and insert your hook into the designated stitch. Yarn over and pull through a loop (5 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (4 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on hook). Yarn over and pull the yarn through the last two loops on your hook.

Front Post Single Crochet (US) and Raised Double Crochet Front (UK)

A front post single crochet (FPsc) stitch in US terms is the same as a raised double crochet front (RdcF) in UK terms. Some UK patterns also use the term “front post” or “FP” for this stitch. To make this stitch, insert your hook from the front to the back at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (2 loops on hook). Yarn over and pull yarn through the last two loops on your hook.

Back Post Single Crochet (US) and Raised Double Crochet Back (UK)

A back post single crochet (FPsc) stitch in US terms is the same as a raised double crochet back (RdcB) in UK terms. Some UK patterns also use the term “back post” or “BP” for this stitch. To make this stitch, insert your hook from the back to the front at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (2 loops on hook). Yarn over and pull yarn through the last two loops on your hook.

This Crochet Winter Hat Pattern uses front post / raised stitches.

Front Post Double Crochet (US) and Raised Treble Front (UK)

A front post double crochet (FPdc) stitch in US terms is the same as a raised treble front (RtrF) in UK terms. Some UK patterns also use the term “front post” or “FP” for this stitch. Here’s how to make this stitch: yarn over, insert your hook from the front to the back at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on hook). Yarn over, pull the yarn through the last two loops on your hook.

Back Post Double Crochet (US) and Raised Treble Back (UK)

A back post double crochet (BPdc) stitch in US terms is the same as a raised treble back (RtrB) in UK terms. Some UK patterns also use the term “back post” or “BP” for this stitch. Here’s how to make this stitch: yarn over, insert your hook from the back to the front at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on hook). Yarn over, pull the yarn through the last two loops on your hook.

Front Post Triple Crochet (US) and Raised Double Treble Front (UK)

A front post triple crochet (FPtr) stitch in US terms is the same as a raised double treble front (RdtrF) in UK terms. Some UK patterns also use the term “front post” or “FP” for this stitch. To make this stitch, yarn over twice, insert your hook from the front to the back at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (4 loops on hook). Yarn over and pull yarn through the first two loops on your hook (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on hook). Yarn over and pull the yarn through the last two loops on your hook.

Front Post Triple Crochet (US) and Raised Triple Treble Front (UK)

A back post triple crochet (BPtr) stitch in US terms is the same as a raised double treble front (RdtrB) in UK terms. Some UK patterns also use the term “front post” or “FP” for this stitch. To make this stitch, yarn over twice, insert your hook from the back to the front at the right of the designated stitch and bring your hook out at the left of the same stitch. Yarn over and pull through a loop (4 loops on hook). Yarn over and pull yarn through the first two loops on your hook (3 loops on hook). Yarn over and pull the yarn through the first two loops on your hook (2 loops on hook). Yarn over and pull the yarn through the last two loops on your hook.

Two, Three or More Stitches Together (US and UK)

Making two (or more) stitches together is often used for a decrease where you combine two (or more) stitches. Or, you can make stitches together in the same stitch such as when making a bobble stitch. Follow the pattern for instructions for making two (or more ) stitches together. You may also see that the pattern calls for three stitches together (3tog), four stitches together (4tog) or more.

• Single crochet two stitches together (sc2tog) in US terms is the same as double crochet two stitches together (dc2tog) in UK terms.
• Double crochet two stitches together (dc2tog) in US terms is the same as treble two stitches together (tr2tog) in UK terms.
• Triple/treble crochet two stitches together (tr2tog) in US terms is the same as double treble two stitches together (dtr2tog) in UK terms.

US vs UK Crochet Hooks

Many crochet hooks are labeled with a letter and/or a number and have a measurement such as: H/8 – 5.00 mm.

Let’s take a look at what this means. In this example, H/8 is the US Sizing reference and the measurement, 5.00 mm, is the measurement of the diameter of the shaft in metric units, which is the UK Sizing.

UK Crochet Hook Sizes

UK / Metric Crochet Hook Sizes are measurements, in millimeters such as 5.00 mm, which is measured across the shaft of the hook. Crochet hooks range in size from 0.35 mm to 30 mm, measured across the crochet hook. Crochet measurements are often called metric units or UK sizing because they use millimeters (mm).

US Crochet Hook Sizes

US Crochet Hook Sizes include a letter and/or number such as H/8. The lettering system goes from B, which is the smallest hook to T, which is the largest hook.

UK to US Crochet Hook Conversion Chart

Metric / UK Sizing	US Sizing
2.25 mm	B/1
2.50 mm
2.75 mm	C/1
3.125 mm	D
3.25 mm	D/3
3.50 mm	E/4
3.75 mm	F/5
4.00 mm	G/6
4.25 mm	G
4.50 mm	7
5.00 mm	H/8
5.25 mm	I
5.50 mm	I/9
5.75 mm	J
6.00 mm	J/10
6.50 mm	K 10 1/2
7.00 mm
8.00 mm	L/11
9.00 mm	M/N /13
10.00 mm	N/P /15
11.50 mm	P/16
12.00 mm
15.00 mm	P/Q
15.75 mm	Q
16.00 mm	Q
19.00 mm	S
25.00 mm	T/U/X
30.00 mm	T/X

Learn more in my complete guide to crochet hook sizes.

UK vs US Yarn Weights & Sizes

Another difference between the UK and the US is the measurements used to weigh yarn and also the categories of yarn weights and sizes.

The weight of a skein of yarn in the UK is often referred to in grams (g). Yarn in the US is mostly referred to in ounces (oz). Fortunately, most yarn labels will have both grams and ounces listed.

Yarn comes in all different sizes and has different levels of thickness. To help people who use yarn regularly, such as knitters and crocheters, yarn is classified into categories called “yarn weights.”

Yarn weight is determined by the thickness of the strand of yarn, not by how much the skein (the ball of yarn) weighs.

These yarn weight groups help us select yarn with the right level of thickness for our project.

The yarn weight categories are an effort by The Craft Yarn Council and others to standardize the yarn industry (and crafts that use yarn such as crochet and knitting) around the world with the same label for groups of yarn.

Prior to the Standard Yarn Weight System, what one weight of yarn was called in one country could be completely different in another country.

You may see references to old terms in patterns that use UK terms but it’s important to understand and use the new terminology for yarn weights.

Learn more about yarn weights with this Yarn Weight Chart and Guide.

I hope this has helped you understand the difference between UK and UK crochet terminology.

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