Macramé Cord Length Calculator

Macramé is a textile craft that uses knotting rather than weaving or knitting to create decorative and functional items. One of the most common challenges for beginners and experienced makers alike is estimating how much cord to purchase for a project. Cut your cords too short and you cannot finish the piece. Buy too much and you waste money on expensive specialty cord.

The amount of cord needed depends primarily on the finished length of the piece, the number of working cords, and the type of knot used. Different knot types consume cord at very different rates because some knots are bulkier and use more material per unit of length than others.

The square knot (also called the reef knot) is the most fundamental macramé knot. It works in groups of four cords: the two on the outside do the knotting and the two in the middle just sit there being wrapped around. The outer working cords swallow roughly 4 times the finished length; the inner fillers barely shorten at all and need about 2 times.

Average those honestly and you get 3 times per cord. This calculator uses 4 times anyway, and deliberately. You do not know in advance which of your cords will end up as workers and which as fillers, patterns swap them constantly, and a cord cut at the average length is a cord that runs out the moment it takes a turn on the outside. Cut everything for the worst case.

The spiral knot (also called the half square knot spiral) creates a twisted column effect. Because the working cords continuously wrap around the fillers in one direction, they consume more material. Plan for approximately 5 times the finished length for spiral knot patterns.

The half hitch knot and its variations (double half hitch, diagonal half hitch) are used to create lines, angles, and shapes. These are moderately cord-intensive, requiring roughly 3.5 times the finished length depending on the density of the knotting.

The gathering knot (also called the wrapping knot) is used to bundle cords together, often at the top of a plant hanger or wall hanging. The wrapping cord itself needs about 6 times the wrapped section length, but since gathering knots are typically only a small portion of the total project, the overall multiplier for a project using gathering knots is around 3 times the finished length for most cords, plus extra for the wrapping cord.

Additional factors to consider include cord thickness (thicker cord makes bulkier knots), cord material (cotton stretches more than jute or polyester), and the complexity of the pattern. Adding 10 to 20 percent extra is always recommended as a safety margin. It is far better to have leftover cord than to run short near the end of a project.

Working cords versus cut pieces

This trips people up constantly. A working cord is one length hanging from the dowel. A cut piece is what you snip off the reel. They are usually not the same thing, because cords are normally mounted with a lark’s head knot: you fold a long piece in half over the dowel and pull the ends through, which turns one cut piece into two working cords.

So a hanging with 16 working cords needs 8 cut pieces, each cut at twice the working length. Cut them at the working length and fold them and every cord is half as long as it needs to be. The calculator handles this for you, but check which mounting method you have selected before you reach for the scissors.

When calculating totals, multiply the finished length by the knot multiplier to get one working cord, add the safety margin, then double it if you are folding. Multiply by the number of pieces you are cutting for the total to buy.