Multiply the length of the necklace by 25.4, then divide the number you get by the size of the beads in millimeters. This will give you a good estimate of how many beads will be needed for that specific necklace length.
For example, a 36-inch necklace made with 2.5 millimeter beads would be calculated as follows:
36 x 25.4 = 914.4, then 914.4 / 2.5 = 365.76, and round up to 366
Here are some conversion charts that can help you compare bead-by-bead sizes in inches and millimeters. You can print them out for your convenience and at-your-fingertips reference:
Products sold by Fire Mountain Gems and Beads® are intended for experienced jewelry-makers and designer-artists; children 14 years of age or younger should use these products with adult direction.
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