A general rule is to multiply your finished piece length by 4–8×, depending on the knot complexity. Simple knots like the Half Hitch need ~3–4×, while intricate knots like the Josephine Knot can require 6–7×. Use our calculator above for a precise estimate tailored to your project.

The "4× rule" is a beginner-friendly guideline: cut each cord to 4 times the desired finished length. This works well for simple patterns with basic knots. For more complex designs, you'll need 5–8×. Our tool adjusts the multiplier based on your chosen knot type and cord thickness.

For a typical 3-tier plant hanger (36–40" finished length), you'll need 4–8 working cords, each about 6–8× the finished length. That's roughly 18–25 feet per cord. With 8 cords, total cord needed is around 150–200 feet. Add 10–15% extra for safety. Select "Plant Hanger" in our preset for an instant estimate.

Yes! Thicker cords (5mm+) consume more length per knot because the knots themselves are bulkier. Our calculator includes a thickness adjustment factor — thicker cords get a higher multiplier to account for this extra consumption.

We recommend a 10–15% safety margin for experienced crafters and 18–20% for beginners. This accounts for measurement errors, tension variations, and trimming. Cord is relatively inexpensive, and having extra is far better than running out mid-project and trying to join new cords invisibly.

For a small wall hanging (18–24" finished length, 12" wide), you'll typically need 16–24 working cords, each 100–150 inches long. Total cord needed is approximately 130–250 feet, depending on knot complexity. Select "Wall Hanging" in our preset for a quick estimate.

You can join new cord using a "reef knot" or by weaving the new cord into the back of your piece. However, joins can be visible and may affect the piece's integrity. That's why we strongly recommend generous safety margins. For wall hangings, you can sometimes hide joins behind other cords.

With a Lark's Head mount, each cord is folded in half over the dowel or ring. This means each physical cord produces two working strands. So you need half as many cords, but each must be twice as long. The total cord length remains the same. Our calculator handles this automatically when you toggle the Lark's Head option.

3–4mm single-strand cotton cord is ideal for beginners. It's easy to work with, holds knots well, and provides a beautiful finished look. Cotton is also forgiving — it has some stretch and grip, making it easier to achieve consistent tension. Avoid slippery synthetic cords until you've mastered the basics.

Absolutely! For bracelets (7–8" finished), you'll typically need 4–6 thin cords (1–2mm), each about 28–48 inches long. For necklaces, add more length. Select "Bracelet" in our preset for a starting point, then adjust based on your specific design. Jewelry often uses finer cord, so choose the appropriate thickness.