How Many Beads Do I Need? Bead Counts for Bracelets and Necklaces

Feb 10, 2026

Written by Tejas Beads

How Many Beads Do I Need? Bead Counts for Bracelets and Necklaces

To work out how many beads you need, convert the length to millimeters (1 inch = 25.4 mm) and divide by the bead size in millimeters. A 7 inch bracelet of 8 mm beads is 7 x 25.4 = 177.8 mm, and 177.8 / 8 = 22 beads; an 18 inch necklace of 6 mm beads is 457.2 / 6 = 76 beads. The chart below does the math for every common size, and the sections after it cover spacers, rondelles, chips, knotted strands, malas and how many strands to buy.

The Bead Count Formula

Number of beads = length in mm / bead size in mm. To get the length in millimeters, multiply inches by 25.4. Our jewelry maker conversion charts list the common inch and millimeter equivalents if you would rather look them up.

The formula assumes the beads sit touching, with nothing between them. Anything else on the strand takes up length too:

Spacers: add the spacer's width to the bead size. 8 mm beads with a 3 mm spacer between each one use 11 mm per pair, so a 7 inch bracelet takes 177.8 / 11 = 16 beads and 16 spacers.
Knots: add the knot's width to the bead size (see knotted strands below).
Clasp: subtract the length of the clasp and its rings before you divide. On a necklace that is usually 1/2 to 1 inch.

Bead Count Chart by Size

Counts are rounded to the nearest whole bead, for beads strung touching with no spacers, knots or clasp. The strand column is rounded down, since a strand cannot hold part of a bead.

Bead size	Per inch	7 in bracelet	16 in	18 in	20 in	24 in	15.5 in strand
2 mm	12.7	89	203	229	254	305	196
3 mm	8.5	59	135	152	169	203	131
4 mm	6.4	44	102	114	127	152	98
6 mm	4.2	30	68	76	85	102	65
8 mm	3.2	22	51	57	64	76	49
10 mm	2.5	18	41	46	51	61	39
12 mm	2.1	15	34	38	42	51	32

Polished round tiger's eye beads, sold in sizes from 4 mm to 14 mm

Why Real Strands Hold a Few Less

The chart is the math. Real strands usually hold a bead or a few less, for 2 reasons. First, natural stone varies a little from bead to bead. Second, our sizes are true sizes: when a run of 6 mm beads is cut, the beads come out across a small range, and we sort them into 6 mm and 6.5 mm rather than selling the whole range as 6 mm. A bead sold as 6 mm measures 6 mm or a fraction over, so a strand fits slightly fewer than the math says.

Our strands are about 15 to 15.5 inches. In practice, plan on about 60 beads on a strand of 6 mm, about 45 of 8 mm and about 38 of 10 mm, and buy a few beads more than the chart says so you can set aside any you do not like.

Standard Bracelet and Necklace Lengths

Necklace names are conventions rather than fixed sizes, and sources differ by an inch or so, but these are the lengths most jewelers use.

Piece	Length	Where it sits
Bracelet, small	6 to 6.5 in	Small wrists; children's sizes run about 5 to 6 in
Bracelet, average	7 in	The most common women's size
Bracelet, large	7.5 to 8 in	Larger wrists or a looser fit
Men's bracelet	8 to 8.5 in	Most men's wrists
Anklet	9 to 10 in	Just above the ankle bone
Collar	12 to 13 in	Snug around the middle of the neck
Choker	14 to 16 in	At the base of the neck
Princess	17 to 19 in	At or just below the collarbone; 18 in is the most common necklace length
Matinee	20 to 24 in	Between the collarbone and the bust
Opera	28 to 36 in	At or below the bust; can be worn doubled
Rope	Over 36 in	Long enough to wrap twice or tie in a loose knot

For a bracelet, measure the wrist snugly and add about 1/2 inch for small beads and up to 1 inch for 10 mm and larger beads, which take up room on the inside of the circle. Our guide to elastic cords covers which cord to string a stretch bracelet on.

Rondelles: Count by Thickness

Rondelles are sold by 2 numbers, such as 4x6mm or 5x8mm. The larger number is the diameter and the smaller one is the thickness along the hole, and on a strand each rondelle takes up only its thickness. Count with the smaller number: a 7 inch bracelet of 5x8mm rondelles takes 177.8 / 5 = 36 beads, and one of 4x6mm takes 44. Rondelles also tilt and nest against each other, so their counts vary more than rounds; lay them out and measure. Thin heishi beads work the same way, often 1 to 3 mm thick, so a single strand covers a lot of beads.

Smooth red jasper rondelle beads in 4x6mm and 5x8mm sizes

Chips and Nuggets

Chip beads are irregular, sized to about plus or minus 1 mm, and they overlap on the cord, so counting them does not tell you much. Buy chips by length instead: a strand covers about its own length when restrung, so a 7 inch bracelet takes about half of a 15 inch strand and an 18 inch necklace takes about 1.25 strands. Nuggets work the same way. Their length along the hole varies from piece to piece, so lay out the design, measure it, and buy by the inch rather than the bead.

Smooth amethyst freeform chip beads in lavender to violet

Knotted Strands

A knot between each bead takes up its own width. With fine cord such as 0.4 mm or 0.5 mm S-Lon or silk worked doubled, plan on roughly 1 mm per knot, and more with thicker cord. Add the knot to the bead size before you divide: an 18 inch knotted necklace of 8 mm beads takes 457.2 / 9 = 51 beads instead of 57. Tie a few test knots on your cord, measure 10 beads and knots, and divide by 10 for an exact figure.

Mala Bead Counts

A traditional mala has 108 beads plus a larger guru bead. Strung touching, 108 beads of 6 mm make 648 mm, about 25.5 inches, and 108 of 8 mm make 864 mm, about 34 inches. With a knot between each bead, those grow to roughly 30 and 40 inches. That works out to 2 strands of 6 mm or 3 strands of 8 mm, with spares. A 27 bead wrist mala comes to about 6.4 inches in 6 mm, 7.4 inches in 7 mm beads and 8.5 inches in 8 mm. Our guide to making a mala necklace covers the cord and knotting.

How Many Strands to Buy

Divide the beads you need by the beads on a strand and round up. A few worked examples, using the practical strand counts above:

7 inch bracelet, 8 mm: 22 beads, so 1 strand of about 45 makes 2 bracelets.
18 inch necklace, 6 mm: about 17 inches of beads after the clasp, or 72 beads, so 2 strands.
16 inch necklace, any size: 1 full strand plus a clasp comes to about 16 inches.
Mixed designs: count each stone separately, then add 1 or 2 spare beads of each.

Natural stone strands always include a bead or 2 that is chipped, oddly colored or drilled off center, so a little extra is worth having. Browse by size in our 4 mm, 10 mm and 12 mm collections as well as 6 mm and 8 mm.

Frequently Asked Questions

How many 8 mm beads do I need for a bracelet?

22 for a 7 inch bracelet, 21 for 6.5 inches and 24 for 7.5 inches. Add 1 if you like a looser fit.

How many 6 mm beads are in a 16 inch necklace?

68 by the formula, before the clasp. With a 3/4 inch clasp, about 65.

How many beads are on a 15 inch strand?

By the formula, 95 of 4 mm, 63 of 6 mm, 47 of 8 mm and 38 of 10 mm. Real strands often hold a few less: on ours, plan on about 60 of 6 mm and 45 of 8 mm.