How to Crochet Half Double Crochet Stitch (HDC)

Ultimate Guide to The Joy of HDC in Crochet

Half double crochet is a beautiful crochet stitch; it's simple and versatile and fun and fabulous. It is definitely one of the basic crochet stitches that a beginner should master when learning how to crochet. This guide shows you how to crochet the hdc stitch, along with variations on half double crochet, tips for understanding the stitch better and resources for making the most of half double crochet.

  • 01 of 12

    Understanding Half Double Crochet

    Row of Half Double Crochet
    Row of Half Double Crochet. Kathryn Vercillo

    Before we begin with the instructions, it's important to understand this crochet stitch. When first learning to crochet, most people will learn a single crochet stitch and then a double crochet stitch. As the name suggests, the half double crochet stitch is half the height of the double crochet and is, in fact, between the single crochet and double crochet in height. So, if you know how to do those two stitches, you already know how to do the half double crochet stitch, even if you...MORE haven't learned it yet!

    Tip: Learn single crochet and double crochet stitches first to make learning the half double crochet stitch easier.

  • 02 of 12

    Your Materials: Yarn and Crochet Hook

    Yarn and Crochet Hook
    Yarn and Crochet Hook. Kathryn Vercillo

    The half double crochet stitch is used in all different types of projects so you can use any yarn and any crochet hook to make the half double crochet stitch. If you are working with a crochet pattern, the pattern will tell you what to use. If you've chosen your yarn, you can look at the yarn label to find out what hook size you need for that yarn.

  • 03 of 12

    Start With a Slip Knot

    Crochet Slip Knot
    Crochet Slip Knot. Kathryn Vercillo

    All crochet projects begin with a slip knot, which you already know how to do if you've learned how to single crochet and how to double crochet. Learn how to crochet a slip knot here.

  • 04 of 12

    Crochet a Foundation Chain

    Crochet Foundation Chain
    Crochet Foundation Chain. Kathryn Vercillo

    You will be working your half double crochet stitches in two rows so you need to create a foundation chain to work the first row into. You can crochet a foundation chain of any length. If you are working with a crochet pattern, use the chain length specified in the crochet pattern.

    Continue to 5 of 12 below.
  • 05 of 12

    A Note On First Stitches and Turning Chains

    Chain 2 for Turning Chain (HDC)
    Chain 2 for Turning Chain (HDC). Kathryn Vercillo

    When you crochet in rows, you begin the row with a turning chain. The height of the turning chain depends on the height of the crochet stitch. In single crochet, you chain one for your turning chain. In double crochet, you chain three. So, as you might guess, in half double crochet, which is taller than single crochet but shorter than double crochet, you will chain two.

    However, when you begin the first row, you don't need to chain more because you're already working into a chain. What...MORE you'll do is work your first half double crochet into the foundation chain so that the number of chains you skip is the same as the number of chains a turning chain would be. So in half double crochet, a turning chain is two, so you will crochet your first half double crochet into the chain that is two away from your hook. 

  • 06 of 12

    Yarn Over and Insert Your Crochet Hook

    Insert Hook for HDC
    Insert Hook for HDC. Kathryn Vercillo

    To make your first half double crochet stitch, yarn over and insert your crochet hook into the stitch. (As described in step five, it's in the second chain away from the hook to start the row; it will be in each subsequent stitch thereafter.)

    Note that if you were making a double crochet, you would also do this step. If you were making a single crochet, you would not yarn over before inserting the crochet hook.

  • 07 of 12

    Yarn Over and Pull Through Stitch

    Half Double Crochet Steps
    Half Double Crochet Steps. Kathryn Vercillo

    You will yarn over again and then pull the yarn through the stitch. So, when you finish step six, your hook have one yarn over and will be inserted through the work; when you finish step seven, you will have a second yarn over that you've pulled through.

  • 08 of 12

    Yarn Over and Pull Through Loops

    Half Double Crochet Stitch
    Half Double Crochet Stitch. Kathryn Vercillo

    Yarn over one more time. You will see three loops on your crochet hook. Pull the yarn through all three loops. That's your first half double crochet stitch.

    Note that if you were doing a double crochet, you would pull the yarn through only two loops, yarn over again and pull through the final two loops. What makes this the half double crochet is that you shorten that step by pulling the yarn through all three loops at once.

    Continue to 9 of 12 below.
  • 09 of 12

    Complete The Row

    Row of Half Double Crochet
    Row of Half Double Crochet. Kathryn Vercillo

    At the end of step 8, you've made one half double crochet stitch. To complete the row of hdc stitches, repeat steps 6-8 across the row.

    To begin your new row, you'll turn your work, chain two for your turning chain and make hdc stitches in all of the stitches from the row before.

  • 10 of 12

    Increasing and Decreasing in Half Double Crochet

    Half Double Crochet Decrease
    Half Double Crochet Decrease. Kathryn Vercillo

    Once you've completed the steps above, you can crochet any half double crochet pattern that's worked in consistent rows, such as scarves or even blankets made in half double crochet. But if you want to crochet anything that has shape, you may need to know how to increase and decrease in half double crochet. Don't worry; it's easy.

    Increasing is especially easy, because all that you'll do is make an extra half double crochet stitch where you've already made one. Your...MORE crochet patterns will tell you how to do this. But, for example, let's say that you increase at the end of the row; in the final stitch of the row, you will crochet two hdc stitches in the final stitch instead of just one.

    Decreasing is a little more difficult but it's still easy. Here are the steps:

    • Yarn over (as normal)
    • Insert hook into stitch (as normal)
    • Yarn over and pull through (as normal)
    • Repeat those three steps. Notice that what you're doing here is leaving the top of the first hdc unfinished, starting the next hdc in the next stitch and finishing both together in the next stitch. So, you're going to have three loops on the hook, you'll yarn over again and insert the crochet hook into the next stitch, then yarn over and pull through. 
    • Yarn over one more time, so that you have five loops on the hook, and pull through all of the five loops.

    That's the half double crochet decrease, which is basically one half double crochet stitch worked over two subsequent stitches instead of into just one stitch.

  • 11 of 12

    FLO, BLO and Third Loop in Half Double Crochet

    Half Double Crochet, Back Loop Only
    Half Double Crochet, Back Loop Only. Kathryn Vercillo

    You can change the appearance of a basic stitch like half double crochet by working into only one of the loops instead of into both of them. I personally love the way that half double crochet looks when worked into the back loop only and often do this. You can also work into the front loop only. Learn about crocheting through the loops here.

    You can work front loop only and back loop only crochet with almost any crochet stitch. What is really interesting is that half double crochet actually has a...MORE third loop. This means that you have to understand the anatomy of the loops better to make sure that you're correctly crocheting into the front loop or back loop. It also means that you can work into the third loop instead, a technique that creates a great knit-like fabric. Moogly has great instructions about the third loop in half double crochet.

  • 12 of 12

    Extra HDC Tips and Info

    Half Double Crochet Increase
    Half Double Crochet Increase. Kathryn Vercillo

    Here are some other things you might want to know or learn about half double crochet:

    • Half double crochet is a US crochet term; it's called half treble crochet in UK crochet patterns.
    • You can replace the double crochet stitch in many patterns with a half double crochet stitch for a shorter design that looks the same. For example, you can make a v-stitch, normally done in double crochet, as a hdc v-stitch instead.
    • When a half double crochet replaces a single crochet in a  stitch pattern,...MORE it's often considered the "extended" version of the stitch; for example, the extended seed stitch uses alternating hdc and tr stitches instead of alternating sc and dc stitches.
    • Half double crochet shell stitches make really beautiful edging for blankets.