Bracelet Beads
Calculate number of beads for a bracelet: length (cm) / bead diameter (mm) × 10.
Beads
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Beads per bracelet
The bead count comes from dividing the bracelet length by the bead diameter: beads = length / diameter. So a 4 mm bead on an 18 cm bracelet works out to 45 beads. Don't forget the clasp. Set aside 1–2 cm for it (lobster, magnetic, toggle) and take that off the strung length before you count. If you're working with seed beads, the sizes run on the aught system: 6/0 ≈ 4 mm, 8/0 ≈ 3 mm, 11/0 ≈ 2 mm, 15/0 ≈ 1.5 mm, where a bigger number means a smaller bead, which trips people up at first. Common weaving patterns you'll run into are peyote (offset rows), brick stitch, square stitch and the Japanese kumihimo braid.
Applications
It turns up in jewelry making and general handicrafts, in occupational therapy where it helps with fine-motor rehab, in school crafts, and in religious pieces such as baptism beads, rosaries and prayer malas (108 beads). The same math sizes memory wire bangles, anklets and chokers.
FAQ
Should I round up or down? Round down, then add the clasp. A slightly tight bracelet beats a loose one, especially with elastic, which gives over time.
How much wire or thread do I need? Leave yourself 15–20 cm extra beyond the bracelet length so you have room to tie knots, crimp, or finish off the clasp.
Do mixed bead sizes work? They do. Either use an average diameter, or for a precise pattern add up each bead's diameter one by one.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.