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Comparative Micron Chart

U.S. MESH
MICRONS
INCHES
MILLIMETERS
3
6730
0.2650
6.730
4
4760
0.1870
4.760
5
4000
0.1570
4.000
6
3360
0.1320
3.360
7
2830
0.1110
2.830
8
2380
0.0937
2.380
10
2000
0.0787
2.000
12
1680
0.0661
1.680
14
1410
0.0555
1.410
16
1190
0.0469
1.190
18
1000
0.0394
1.000
20
841
0.0331
0.841
25
707
0.0280
0.707
30
595
0.0232
0.595
35
500
0.0197
0.500
40
400
0.0165
0.400
45
354
0.0138
0.354
50
297
0.0117
0.297
60
250
0.0098
0.250
70
210
0.0083
0.210
80
177
0.0070
0.177
100
149
0.0059
0.149
120
125
0.0049
0.125
140
105
0.0041
0.105
170
88
0.0035
0.088
200
74
0.0029
0.074
230
63
0.0024
0.063
270
53
0.0021
0.053
325
44
0.0017
0.044
400
37
0.0015
0.037

What is a micron?

A micron is another measurement that is used for measuring particle size. A micron is one-millionth of a meter or one twenty-five thousandth of an inch.

What does mesh size mean?

Figuring out mesh sizes is simple. All you need to do is to count the number of openings in one inch of screen (in the United States, anyway.).

Therefore, the number of openings is the mesh size: a 4 mesh screen means there are four little squares across one linear inch of screen, and a 100 mesh screen has 100 openings.

Note:

As the number describing the mesh size increases, the size of the particles decreases.

Higher numbers = finer powder.

Mesh size is not a precise measurement of particle size. Screens can be made with different thicknesses of wire. The thicker the wires, the smaller the particle passing through that screen, and vice versa.

How fine do screens get?

That depends on the wire thickness. However, the supplier of our screens does not offer any screens finer than 500 mesh.If you think about it, the finer the weave, the closer the wires get together, eventually leaving no space between them at all. So, beyond 325-400 mesh, we usually describe particle size in "microns."

Micron Chart showing the different measurements