Calculate how many beads you need for a bracelet or necklace from its length and bead size, with clasp and spacing, or the length from a bead count.

Typical: bracelet 7 in, choker 16 in, princess 18 in, matinee 20–24 in, opera 30 in.

Optional settings
Optional; blank = 0. Counted once per bead, including the end allocation, not just the gaps between beads.

Clasp, crimps and knots together. Blank means none.

5% is an editable purchasing allowance, not beads added to the fitted strand.

Bead Formula

The following formula is used to calculate the total number of beads needed for a bracelet.

B = BRL × 10 / (BW)
  • Where B is the number of beads
  • BRL is the bracelet length (cm)
  • BW is the bead width (mm)

The ratio is a fractional estimate for uniform beads without clasps or spacing. To find whole beads that fit, round down. The calculator subtracts the findings allowance, counts spacing once per bead including an end allocation, multiplies across identical strands and rounds purchase extras up. This is straight strung length, not bracelet inner fit.

How many beads do I need for a bracelet?

Example Problem:

The following example outlines how to calculate the number of beads needed to make a bracelet.

First, determine the length of the bracelet. For this example, the bracelet is 40 cm long.

Next, measure the width of the beads being used for the bracelet. In this case, the beads are 6 mm wide.

Finally, calculate the number of beads needed using the formula above:

B = BRL*10 / (BW)

B = 40*10 / 6

B ≈ 66.67 before whole-bead rounding. Exactly 66 whole 6 mm beads fit in 40 cm with no clasp or spacing, occupying 396 mm and leaving a 4 mm gap. With the editable 5% spare allowance, purchase 70 beads.