Calculate the exact number of beads needed for your jewelry projects including necklaces, bracelets, anklets, and earrings
| Bead Size | Beads per Inch | Beads per 16" Strand |
|---|---|---|
| 2mm | 12.7 | 203 |
| 3mm | 8.5 | 136 |
| 4mm | 6.4 | 102 |
| 6mm | 4.2 | 68 |
| 8mm | 3.2 | 51 |
| 10mm | 2.5 | 41 |
| 12mm | 2.1 | 34 |
Inputs
Result
You need 56 beads (exact) or 62 beads with 10% buffer. This requires 2 strands of 8mm beads (standard 16-inch strands contain about 51 beads each).
Inputs
Result
You need 19 main beads and 19 spacer beads (exact), or 21 of each with 10% buffer. This requires 1 strand of 6mm beads and a small packet of 3mm spacers.
Inputs
Result
You need 13 beads (exact) or 15 beads with buffer for both earrings. A single strand of 4mm beads (about 102 beads) provides enough for multiple earring projects.
The number of beads depends on bead size. For common sizes: 6mm beads need about 76 beads, 8mm beads need about 57 beads, and 10mm beads need about 46 beads. Always add 10-15% extra for buffer and design flexibility.
Standard bead strands are typically 15-16 inches long. The number of beads varies by size: 6mm beads have about 68 beads per strand, 8mm have about 51, 10mm have about 41, and 12mm have about 34 beads per strand.
Divide 25.4mm (one inch) by the bead size in millimeters. For example, 6mm beads: 25.4 ÷ 6 = 4.2 beads per inch. This gives you the approximate number of beads that fit in one inch when strung together.
Yes, always subtract the clasp length from your total project length before calculating beads needed. Most clasps add 0.5 to 1 inch to the total length, so you will need fewer beads than the full project length.
Spacer beads are placed between main beads in an alternating pattern. This roughly doubles the number of beads needed but reduces the number of main (usually more expensive) beads required. Calculate spacers separately based on their size.
Buying 10-15% extra beads accounts for breakage during stringing, size variations in natural beads, design adjustments, and having matching beads for future repairs. It also ensures you can complete your project if some beads are unusable.
More craft calculators for jewelry making and creative projects
Last Updated: Feb 13, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.