Bead Thread Length Calculator

For a single-strand necklace, estimate thread length as: (number of beads x bead diameter) + 12 to 18 inches for knotting, clasps, and finishing tails. For double or triple passes through beads (as in peyote or brick stitch), multiply accordingly. This calculator handles multiple passes automatically.

In bead weaving (peyote, brick stitch, herringbone), a working thread length of 36 to 48 inches (90 to 120 cm) is common. Longer threads tangle more easily. Experienced beaders often work with shorter lengths and join threads as needed. The calculator gives total thread needed; divide by your preferred working length.

Thread must fit through the bead hole at least twice (often 3 to 5 times in weaving stitches). Smaller bead holes require thinner thread. Size 15 seed beads typically need size D or thinner thread. Size 8 or 6 seed beads can take heavier thread or Fireline. Always test thread fit before starting a project.

Beading thread (nylon, silk, Fireline) is thin and flexible, used with beading needles for woven or strung beadwork. Beading cord (elastic, leather, nylon cord) is thicker, often used for strung bracelets and necklaces without needles. The thread length formula is the same for both.

If you are knotting between each bead (as in pearl knotting), you need approximately 1 to 2 inches of extra thread per bead for the knot. Add this to the bead diameter to get the spacing per bead, or use the knot allowance field in this calculator.