The reef knot — also called the square knot — is the binding knot. It ties two ends of the same rope together around an object to secure them, and it has been used for bandages and other things for hundreds of years. It is the knot for binding, not for joining: two ends of one rope, around one object.
That distinction matters. Although people tend to use the reef knot for joining two ropes together, it is not recommended for that purpose — it is unstable and can slip out under tension. To join two ropes, lines or strings together, use a bend knot instead.
What you need
- Two ends of the same rope, string or line — or two cords of the same thickness
Steps
- Tie the first overhand knot. Take your right cord and place it over your left cord. Now continue with that cord and wrap it under the left cord. Still with the right cord, carry it over the left cord. This is what it should look like once slightly tightened.
- Complete the second overhand knot. Now you’re tying the same knot as in step 1, except you’re starting with the left cord (which was the right cord previously) and going over your right cord. Take your left cord and place it over your right cord. Now continue with the left cord and wrap it under the right cord. Still with the left cord, continue it over the right cord. This is what it will look like once loosely finished.
Tips
- Right over left, then left over right. The second overhand knot must mirror the first. That mirror is what makes the knot lie flat and hold.
- Use it for binding, not joining. The reef knot is for tying two ends of the same rope around an object — a bandage, a bundle, a package. For joining two separate ropes, use a bend knot (see above).
- Pull both ends evenly so the knot lies flat and square.
FAQ
What is a reef knot used for?
Binding — tying two ends of the same rope together around an object, such as a bandage, a bundle or a package. It has been used for bandages for hundreds of years.
Can I use a reef knot to join two ropes?
Not safely. The reef knot is unstable for joining two ropes and can slip out under tension. Use a bend knot to join two ropes instead.