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Beading Charts
Millimeters to Inches Conversion Chart
1 inch = 25.4mm
Size in mm
Closest equivalent in Inches
1mm
just over 1/32 of an inch
2mm
just over 1/16 of an inch
3mm
1/8 of an inch
4mm
5/32 of an inch
5mm
3/16 of an inch
6mm
1/4 of an inch
7mm
9/32 of an inch
8mm
5/16 of an inch
9mm
11/32 of an inch
10mm
3/8 of an inch
11mm
7/16 of an inch
12mm
15/32 of an inch
13mm
1/2 of an inch
14mm
9/16 of an inch
15mm
19/32 of an inch
16mm
10/16 of an inch
17mm
11/16 of an inch
18mm
23/32 of an inch
19mm
3/4 of an inch
20mm
13/16 of an inch
Beads Per Inch Chart

This chart shows you the approximate number of beads for various lengths.

(length of strand excludes clasp)

Beads Per Inch Chart
Bead Size (mm)
1"
4"
16"
20"
24"
28"
32"
3
8.46
33.8
136
170
204
237
271
4
6.35
25.4
102
127
153
178
204
5
5.08
20.32
82
102
125
143
164
6
4.23
16.9
68
84
101
118
136
7
3.62
14.4
58
70
86
101
116
8
3.17
12.68
51
64
76
89
102
10
2.54
10.16
41
51
61
71
81
12
2.11
8.44
34
42
51
59
68
14
1.81
7.24
29
36
43
50
58
16
1.58
6.32
25
32
38
44
51
18
1.41
5.64
23
28
34
39
45
Necklace Lengths
Type
Length
Choker
16 inches
Princess
18 inches
Matinee
24 inches
Opera
32 inches
Rope
48 inches


But how many beads will I need?

Well, even without an Intel Inside Pentium Processor, you can calculate the number of beads needed for a strand using the following formula:

Just remember that 1 inch = 2.54cm = 25.4mm (1cm ~ 10mm). So, multiply the length of the necklace by 25.4, and divide by the size of the beads in milimeters.

Examples:

1)18 inch necklace made with 4mm beads:

Number of beads = 18x25.4/4 = 108

2)32 inch necklace made with 6mm beads:

Number of beads = 32x25.4/6 = 128

Remember: since beads may be irregular, this number is approximate. Also, if you are knotting between the beads, add 1 or 2mm for each knot, depending on the thickness.



In case you don't remember...

Conversion Chart

1 kilo
1000 grams
2.2 pounds
1/2 kilo
500 grams
1.1 pounds
1 gram
.035 ounces
...
1 ounce
28.35 grams
...
1 gross
12 dozen
144
1/2 gross
72
...
1 mass
100 dozen
1,200
1 inch
2.4cm
...
1cm
10mm
...
1m
100cm
...
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~ New Port Richey, FL 34656
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