What Knitting Through the Back Loop Means

Knitting through the back loop means inserting your needle into the back leg of the stitch instead of the front leg where you normally enter. When you look at a stitch on your needle, you see two loops — the front one closer to you and the back one farther away. Knitting through the back loop (often shortened to TBL) twists the stitch and creates a tighter, denser fabric with a subtly different texture than standard knitting.

This technique is useful for several reasons: it can tighten loose stitches, create a neater edge, or produce intentional texture changes in your pattern. Many knitters use it on the first and last stitch of every row to make selvage edges look cleaner. You may also see it called for in a pattern to add visual interest or to correct tension problems in specific areas.

Key Takeaways

  • Insert your needle through the back loop of the stitch (the one farther from you) instead of the front loop to knit through the back loop.
  • The resulting stitch will be twisted and appear slightly tighter and more defined than a standard knit stitch.
  • Knitting through the back loop on edge stitches creates a neater, more finished selvage along the sides of your work.
  • Your pattern will tell you when to use this technique, usually written as "k1 TBL" or "knit 1 through back loop".

How to Position Your Needle Correctly

Start with your working yarn in the correct position for a knit stitch — held to the back of your work. Look at the stitch you are about to knit and identify both loops. The front loop is the one closest to your face; the back loop is the one you see behind it, farther away from you.

Instead of inserting your right needle from left to right through the front loop (as you do in a regular knit stitch), insert it from right to left through the back loop. This reverses the direction you normally enter the stitch. Your needle will go in from the right side of the stitch and come out on the left side, passing through the back leg only. Once your needle is through, wrap your yarn and complete the stitch exactly as you would a normal knit stitch — pull the new loop through and slide the old stitch off your left needle.

Common Mistakes to Avoid

The most frequent error is entering the back loop from the wrong direction. Many knitters try to insert the needle from left to right (the normal direction) but aim for the back loop instead. This does not work — you will either miss the loop entirely or accidentally knit through both loops at once. Remember: when you knit through the back loop, your needle direction reverses. You enter from the right side of the stitch, not the left.

Another common mistake is accidentally twisting your stitches on the row below. If you knit through the back loop on every stitch for multiple rows, your fabric will become increasingly tight and difficult to work with. Most patterns call for this technique only on specific stitches — usually edge stitches or in deliberate pattern sections. Read your pattern carefully to see exactly which stitches should be worked through the back loop.

Tension can also suffer if you pull too tightly when working through the back loop. Because the stitch is already twisted, pulling hard will make it even tighter and harder to work into on the next row. Use the same tension you normally do, and let the twist of the stitch itself create the tightening effect.

When Patterns Call for Knitting Through the Back Loop

The most common use is on edge stitches. Many knitters work the first and last stitch of every row through the back loop to create a chain-like selvage edge that looks neat and is straightforward to pick up stitches from later. This is especially useful if you plan to add a border or seam the piece to another part of your project.

Patterns also use this technique to create texture. Some stitch patterns deliberately call for certain stitches to be worked through the back loop to create a twisted or braided visual effect. When you see "k1 TBL" or "knit 1 through back loop" in your pattern instructions, that is your signal to use this method for that specific stitch.

You may also encounter it as a fix for tension issues. If you notice that certain stitches are consistently looser than others, working them through the back loop on the next row can tighten them up without having to rip back and reknit. This is a practical solution when one stitch stands out as noticeably larger than its neighbors.

Practicing the Technique on a Swatch

Before using this technique in an actual project, practice on a small swatch using yarn and needles you are comfortable with. Cast on about 15 stitches and knit a few rows normally to warm up. Then, on the next row, knit the first stitch through the back loop, knit the middle stitches normally, and knit the last stitch through the back loop. Repeat this pattern for several rows so you can see how the edge stitches look different from the center stitches.

Pay attention to how the needle feels when you insert it through the back loop. It should feel slightly different from a normal knit stitch — you are moving in the opposite direction. Once you have done it a few times, the motion will become automatic. Keep your practice swatch so you can refer back to it and see exactly what the finished texture looks like.

Reading Pattern Abbreviations for This Technique

Patterns use several shorthand ways to indicate knitting through the back loop. The most common abbreviation is TBL, which stands for "through back loop." You will see it written as "k1 TBL" (knit 1 through back loop) or "p1 TBL" (purl 1 through back loop). Some older patterns or European patterns may write it out fully as "knit through back loop" or use a different abbreviation, so always check the abbreviation key at the beginning of your pattern.

When you see this abbreviation, it applies only to that one stitch unless the pattern says otherwise. If a pattern says "k1 TBL, k2, k1 TBL," you work the first stitch through the back loop, the next two stitches normally, and the last stitch through the back loop. Pay close attention to where the abbreviation appears in your row, because missing even one can throw off the texture or structure of your piece.

Frequently Asked Questions

Does knitting through the back loop make your stitches tighter?

Yes, it does create a tighter stitch because the twist compresses the loop. If your overall tension is loose, working edge stitches through the back loop can help even out the look of your selvage. However, it is not a substitute for adjusting your overall tension — it is a localized tightening technique.

Can you purl through the back loop the same way?

Yes. Purling through the back loop works the same way — you insert your needle through the back loop instead of the front, but from the opposite direction than you normally enter a purl stitch. The result is a twisted purl stitch that looks similar to a twisted knit stitch. Patterns will indicate this as "p1 TBL."

What happens if you accidentally knit through the back loop when the pattern says not to?

You will have one twisted stitch in a row of normal stitches, which will be visible as a slightly different texture or angle. If it is just one stitch and it bothers you, you can drop down to that stitch on a later row and fix it. If it is part of a larger section, it usually blends in once the piece is finished and blocked.

Is knitting through the back loop harder than regular knitting?

It takes a little practice to get the needle direction right, but it is not harder once you understand the motion. Most knitters find it becomes second nature after a few rows. The main challenge is remembering to do it only when the pattern calls for it.

Do you have to block your work differently if you used knitting through the back loop?

No, blocking works the same way. The twist in the stitch will relax slightly when you wet-block your piece, which is normal. The stitch will still be slightly tighter than an untwisted stitch, but blocking will even out the overall fabric and help it lay flat.