Topics: Figuring Beads Needed to Make a 36-inch Strand
How many 2.5mm size beads (14Kt gold round) would I need to make a string 36-inches long?
There's a quick-and-easy equation for that: 1-inch = 25.4 millimeters.
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 So a 36-inch necklace made with 2.5mm beads would require approximately 366 beads.
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: