What This Calculator Does
The Bracelet Bead Count Calculator tells you how many beads you need to make a bracelet that fits a specific wrist. It works for stretch-cord beaded bracelets, loom and rubber-band style bracelets, and any strung jewelry made from uniform round beads. By combining your wrist measurement, the bead diameter, and a little ease (slack), it gives an accurate whole-bead count so you don't over- or under-buy.
How to Use It
Measure around your wrist with a soft tape and enter that value in millimetres. Enter the diameter of one bead — common sizes are 6 mm, 8 mm, and 10 mm. Finally, add an ease value: this is the extra length that lets the bracelet slide over your hand or sit comfortably. A snug fit uses about 6–10 mm of ease; a looser, layered look uses 15–25 mm. The calculator returns the rounded bead count plus the exact (pre-rounding) count and the final strung length.
The Formula Explained
The finished circumference of the bracelet is your wrist circumference plus the ease. Dividing that total by a single bead's diameter gives the number of beads that fit end to end. Because you can only string whole beads, the result is rounded to the nearest integer:
$$\text{Beads} = \text{round}\!\left(\frac{\text{Wrist (mm)} + \text{Ease (mm)}}{\text{Bead Size (mm)}}\right)$$
Worked Example
Suppose your wrist is 170 mm, you're using 8 mm beads, and you want 10 mm of ease. Total length = $$170 + 10 = 180\ \text{mm}.$$ Exact count = $$180 / 8 = 22.5\ \text{beads},$$ which rounds to 23 beads. Those 23 beads span \(23 \times 8 = 184\ \text{mm}\) of strung length — a comfortable, slightly relaxed fit.
FAQ
How much ease should I add? For a fitted stretch bracelet add 6–12 mm; for a relaxed fit add 15–25 mm. Beaded bracelets on elastic can sit closer because the cord stretches over the hand.
Can I use it for non-round beads? Enter the bead's length along the strand (the dimension the cord passes through) as the bead size. Results stay accurate for tube and barrel beads too.
Should I buy extras? Yes — buy 5–10% more beads to cover breakage, color sorting, and design changes.
