Square Knot
Right over left, left over right. The everyday knot for tying two ends of the same rope around something — a package, a bandage, a furled sail.
How to tie the Square Knot
- Cross the right working end over the left and tuck it underneath, forming the first half knot.
- Bring the same end, now on the left, over the other end in the opposite direction.
- Tuck that end underneath to complete the second mirrored half knot.
- Pull all four parts outward while keeping the two half knots flat.
- Dress the knot so each pair of ends exits together on the same side and the finished knot lies flat against the bundle.
How to inspect it
A Square Knot consists of two mirrored half knots. The working end and standing part on each side should exit together. If the ends leave on opposite corners or the second half repeats the first direction, you may have tied a Thief or Granny Knot.
Common mistakes
The major mistake is using the Square Knot to join two free rope ends under changing or critical load. It can capsize, spill, or bind into an unreliable form. Its proper role is generally binding a bundle or object when both ends remain controlled.
Rope and material notes
Flat tape or moderately textured cord makes the mirrored structure easy to see. Smooth, stiff, or differently sized ropes make the knot less dependable. Material friction does not turn it into a suitable life-safety bend.
Safety note: These steps support practice and recognition. Climbing, rescue, lifting, towing, and other critical systems require qualified instruction and equipment-specific procedures.
Which knot should you choose?
Choose a Square Knot as a simple binding knot around an object, package, or bandage when the load is appropriate and monitored. Choose a Sheet Bend, Zeppelin Bend, or Double Fisherman's Bend when the actual task is joining two rope ends.
Why it earns its place
Flat, tidy, easy to teach, and unties with a snap of one end — which is exactly why sailors used it to reef sails. Perfect where the knot presses against a bundle.
Where it fails
The most dangerous knot in the book when misused: it is a binding knot, not a bend. Used to join two separate ropes under load it can capsize and spill without warning. Never trust it with weight.
Quick facts
| Type | Binding knot |
| Under load | Bundles only |
| Untying | Very easy |
| Best for | Packages, bandages, reefing |
External reference
KnotStyle provides the selection advice, written practice sequence, inspection points, and cautions above. Use this independent animation as an additional visual reference.
View external animation ↗Source and editorial notes
Reference: Animated Knots by Grog: Square Knot. Source checked 2026-09-30. Selection advice and difficulty ratings are editorial judgments, not strength tests. How this guide is prepared.