Half double crochet has a useful middle height: taller than single crochet, shorter than double crochet. Its distinctive moment comes at the end, when the hook draws through three loops together. If that movement snags, a small change in hook angle can help more than pulling harder.
The abbreviation is hdc in US patterns. In UK terminology, the equivalent stitch is half treble, often htr. Check the pattern’s language before using the instructions.
Make one half double crochet
Start with a loop on the hook and yarn over. Insert into the next stitch, catch the working yarn and pull up a loop. There are now three loops on the hook. Yarn over and pull through all three in one movement.
The loops should be large enough to slide along the shaft. If one catches under the hook head, ease the hook through and keep the opening facing into the loops. Repeated force tends to make the next stitch tighter.
Practice a row you can count
Chain fourteen, then work hdc into the third chain from the hook and into each remaining chain. This gives twelve hdc stitches. In this exercise, the two skipped chains do not count.
Chain two and turn. Work the first hdc into the first actual stitch and continue once into each stitch across. Leave the turning chain out of the count and out of the final stitch placement. Twelve stitches should remain twelve.
Other patterns may use a different turning height or count the turning chain. Keep their instructions together as one system rather than borrowing an edge rule from a different tutorial.
What is the “third loop”?
At the top of a normal hdc, you can identify the front and back strands of the usual V. There is also an additional horizontal strand below that top. Its position can be easier to see from the reverse side, and the way you view it changes when you work in rows instead of rounds.
For ordinary hdc, use the top V as directed. A pattern asking for the third loop is deliberately changing the placement to create another texture. Do not choose a horizontal strand simply because it is the easiest one to reach.
A quick way to diagnose the wrong stitch
| What you notice | Check this movement |
|---|---|
| The stitches look very short | Did you yarn over before inserting the hook? |
| The stitches look like double crochet | Did you pull through two loops twice instead of through three together? |
| The fabric has an unexpected ridge | Are you working into one loop or the third loop instead of both top loops? |
| The row gains width | Are you working into a turning chain that should not count? |
Compare one stitch at a time. When an entire row looks wrong, it is tempting to change the hook size immediately. But a different stitch or insertion point cannot be corrected by a different hook alone.
Use a swatch to compare the fabric
Try a short sample in hdc and another in single crochet using the same yarn. Measure the width and height after the same number of stitches and rows. Then compare how easily the fabric bends.
This gives you information about your own work. It does not justify replacing every single crochet in a garment pattern with hdc: changing stitch height affects shaping, proportions and the number of rows required.
Before using it for a gift
Count the sample, inspect its edges and wash it according to the yarn label. Record the hook size alongside the measurement. That small note is useful when you return to the project later and discover that your hands are working at a different tension.
For a first baby project, follow a complete pattern using hdc rather than inventing garment measurements from the practice row. Once the stitch is comfortable, you can concentrate on the pattern’s fit and finishing.
Keep learning
Single crochet · Double crochet · Read and count your stitches