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Find the exact cut length for each macrame cord before you start. Covers square, half hitch and spiral knots, with total cord by knot type and count.

📘 How to Use

  1. Pick the knot type (square, spiral or half hitch)
  2. Enter the finished length and knot density
  3. Set the number of cords and a waste margin

Macrame Cord Length Calculator

Working cords wrap left and right around a straight core. Eats more working than core cord.

cm
knots/cm
cords
%

Required Cord Length

Cut Length per Cord
— cm
Total Cord
— m

Breakdown

Knots per column — Knot consumption — Core cord — Waste margin —

* Estimate based on common rules of thumb: square ~4x, spiral ~6.5x and half hitch ~4.5x the finished length per working end. Thicker cord or tighter knots shift the result.

* Cut count assumes each cord is folded in half at the mount, so one cut cord makes two working ends.

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Article

Macrame Cord Length Calculator | Cut the Right Cord Before You Start

Running out of cord three rows from the bottom is every macrame maker's nightmare. You can't splice mid-piece without an ugly bump, so it's unravel-and-restart. This calculator works backward from your finished length and knot type to tell you how long to cut each cord and how much total cord the project will eat.

💡 About this tool

How much cord a knot burns through depends almost entirely on the knot. The widely shared rules of thumb put a square knot at about 4x the finished length per working end, a spiral (half-square) knot at roughly 6.5x because it keeps twisting, and a double half hitch around 4.5x. On top of that, most macrame cords are mounted folded in half with a lark's head, so the length you actually cut is the per-end figure doubled.

This tool multiplies your finished length by the knot's per-end factor, doubles it for the fold, then adds your waste margin to give the cut length per cord. Square and spiral knots ride a separate straight filler (core) cord, so the breakdown also shows that core cut at about 1.5x the finished length. Enter the number of working ends your pattern needs and the tool converts it to cords to actually cut (half, since each folded cord makes two ends).

🧐 Frequently Asked Questions

Why cut cord at several times the finished length? Knots wave the cord back and forth, so a 16 in panel of square knots can swallow 4x that in working cord per end. Tight, dense knotting eats even more.

What does the fold x2 mean? A lark's head mount folds one cord in half into two working ends. The piece you cut before folding has to be twice the length one working end needs.

Does changing knot density change the cut length? In this rule-of-thumb estimate, cut length is driven by finished length and knot type. Density is shown in the breakdown as knots per column so you can sanity-check the look.

How big should the waste margin be? Most makers add 10 to 15 percent. Thicker cord and tighter knots use more, so leave extra headroom on a first attempt at a new pattern.

Does the core cord need to be as long as the working cords? No. The filler or core cord runs roughly straight, so 1.5 to 2x the finished length is plenty. That is the "core cord" row in the breakdown.

📚 Fun Facts

Square knots and spiral knots are mechanically the same knot, only the spiral repeats the same half in one direction so the column self-twists, which is exactly why it devours more cord per inch than its flat cousin. Seasoned makers keep a knotted test swatch of every cord they own: tie one knot, mark it, untie it, and measure, building a personal multiplier chart that beats any generic rule for their specific cotton.