If you have ever crocheted a long starting chain, then tried to work your first row into it, you know the pain. The chain twists, you lose count, and the bottom edge ends up tight and puckered. Foundation single crochet (often written “fsc”) fixes all of that. It builds the chain and the first row of single crochet at the same time.
This guide walks you through it slowly, in US terms, with the mistakes most beginners make and how to fix them. Once it clicks, you may never go back to a plain chain for blankets, scarves, or hats.
What You’ll Need
- Smooth worsted weight (#4) yarn in a light color, so you can see your stitches
- 5 mm (H) or 5.5 mm (I) crochet hook
- Stitch markers (locking ones are easiest)
- Yarn needle for weaving in ends
- Small scissors
What Is Foundation Single Crochet?
A normal project starts with a row of chains, and then you work single crochet into those chains. Foundation single crochet combines those two steps. Each new stitch makes its own little chain at the bottom and a single crochet on top. When you finish, you have a strip that already looks like one complete row of single crochet.
Why bother?
- The edge stretches. A plain chain is often tighter than the stitches above it. Fsc stretches the same as the rest of your work, which matters for hat brims, sweater hems, and necklines.
- No counting long chains. You can stop when the strip is the length you want.
- No hunting for chain loops. Row 1 is already done.
The trade-off is that it feels slow and a bit awkward the first time. That is normal. Give it ten stitches and your hands will start to remember.
How to Work Foundation Single Crochet
Before you start, here is the one idea to hold onto: every fsc has two parts. The bottom part is a chain. The top part is a single crochet. You will always put your hook into the bottom part (the chain) of the stitch you just made.
The First Stitch
Step 1: Make a slip knot and put it on your hook. Chain 2.
Step 2: Insert your hook into the 2nd chain from the hook (the very first chain you made, next to the slip knot).
Step 3: Yarn over and pull up a loop. You now have 2 loops on your hook.
Step 4: Yarn over and pull through just one loop. This is the “chain” part. You still have 2 loops on your hook.
Step 5: Yarn over and pull through both loops. This is the “single crochet” part. Your first fsc is done.
Tip: Put a stitch marker in the chain you made in Step 4. That is where your next stitch goes, and it is the hardest spot to find at first.
Every Stitch After That
Step 6: Find the chain at the bottom of the stitch you just made (the one you marked). Turn your work slightly so you can see it. Insert your hook under the two strands of that chain.
Step 7: Yarn over and pull up a loop. 2 loops on hook.
Step 8: Yarn over and pull through one loop. This makes the new chain at the bottom. Move your marker into this chain.
Step 9: Yarn over and pull through both loops. That completes the single crochet on top.
Step 10: Repeat Steps 6 to 9 until your strip is as long as your pattern needs.
Counting Your Stitches
Count the single crochet tops, not the chains. Each top “V” equals one stitch. If a pattern says “Fsc 30,” you want 30 Vs along the top edge.
Swapping Fsc Into a Pattern That Starts With a Chain
Many patterns tell you to chain a number and then single crochet across. You can usually swap in fsc instead. Use this quick guide:
| Pattern says | Do this instead |
|---|---|
| Ch 31, sc in 2nd ch from hook and in each ch across (30 sc) | Fsc 30 |
| Ch 21, sc in 2nd ch from hook and across (20 sc) | Fsc 20 |
| Ch any number, then sc across | Fsc the number of sc the row should have |
The key: your fsc count equals the number of single crochet in the first row, not the number of chains. The pattern’s extra chain was only the turning chain, which you no longer need.
After your fsc strip, turn your work, chain 1, and start Row 2 of the pattern as written. The single crochet tops of your strip are the stitches you work into.
Joining Fsc Into a Round
For a hat or a cowl worked in the round, make your fsc strip as long as needed. Check that it is not twisted: the bottom chains should all line up along one edge. Then slip stitch into the top of the very first fsc to make a ring. Now you can work rounds as usual.
Common Mistakes (and How to Fix Them)
- Putting the hook into the top of the stitch instead of the bottom chain. If your strip starts curling up into a tight curve, this is likely the cause. Use a stitch marker in each new chain until you can spot it easily.
- Skipping the “pull through one loop” step. Without it, there is no chain at the base and the strip has no stretch. Say “one, then two” in your head on every stitch.
- Going into only one strand of the chain. This leaves holes along the bottom edge. Go under both strands of the chain for a firm edge.
- Pulling the chain part too tight. A tight chain makes the next stitch hard to get into. Keep that first loop a little relaxed.
- Counting chains instead of tops. Always count the Vs along the top edge.
- A twisted ring when working in the round. Lay the strip flat before you join and make sure all the chains face the same way.
Tips
- Practice with a light, smooth yarn. Dark or fuzzy yarn hides the chain you need to find.
- Leave a long tail (about 6 inches) at the start so you can tidy up the first corner when you weave in ends.
- If your fsc edge is still tighter than your rows, try going up half a hook size just for the foundation.
- Make 20 practice stitches, frog them, and do it again. Repeating the motion is the fastest way to learn it.
- Once you are comfortable, the same idea works for foundation half double and foundation double crochet. The base is always a chain, and the top is the regular stitch.
If you learn better by watching, The Loopy Lamb has a free foundation single crochet photo and video tutorial that shows the hand movements up close.
FAQ
Is foundation single crochet good for beginners?
Yes, once you know the regular single crochet. It feels clumsy for the first few stitches because you are looking for a new spot to insert the hook. After about ten stitches, most people find it easier than working into a long chain.
Does foundation single crochet use more yarn?
A little more than a plain chain, because each stitch is really two stitches in one. But you are also making your first row, so overall the yarn use is about the same as chaining and then working a row of single crochet.
Can I use fsc in any pattern?
In most patterns that start with a chain followed by a row of single crochet, yes. Be careful with patterns where the first row skips chains or works into the back bumps for a special look. In those cases, follow the pattern as written.
Try a strip of 20 foundation single crochet today, and the next time a pattern asks for a long chain, you will have a stretchy, easier start ready to go.