mm μm and mesh number comparison table

date icon January.03,2024

Mesh refers to the number of screen holes per square inch. For example, a 50-mesh screen means 50×50 holes per square inch, while a 500-mesh screen has 500×500 holes, so the higher the mesh number, the smaller the pore size and the greater the number of holes. The mesh number is also used to measure the particle size that can pass through the screen. The higher the mesh number, the smaller the particle size.

Mesh number	Micrometer	mm	Mesh number	Micrometer	mm
2 mesh	8000μm	8mm	100 mesh	150μm	0.15mm
3 mesh	6700μm	6.7mm	115 mesh	125μm	0.125mm
4 mesh	4750μm	4.75mm	120 mesh	120μm	0.120mm
5 mesh	4000μm	4mm	125 mesh	115μm	0.115mm
6 mesh	3350μm	3.35mm	130 mesh	113μm	0.113mm
7 mesh	2800μm	2.8mm	140 mesh	109μm	0.109mm
8 mesh	2360μm	2.36mm	150 mesh	106μm	0.106mm
10 mesh	1700μm	1.7mm	160 mesh	96μm	0.096mm
12 mesh	1400μm	1.4mm	170 mesh	90μm	0.090mm
14 mesh	1180μm	1.18mm	175 mesh	86μm	0.086mm
16 mesh	1000μm	1mm	180 mesh	80μm	0.080mm
18 mesh	880μm	0.88mm	200 mesh	74μm	0.074mm
20 mesh	830μm	0.83mm	230 mesh	62μm	0.062mm
24 mesh	700μm	0.7mm	240 mesh	61μm	0.061mm
28 mesh	600μm	0.6mm	250 mesh	58μm	0.058mm
30 mesh	550μm	0.55mm	270 mesh	53μm	0.053mm
32 mesh	500μm	0.5mm	300 mesh	48μm	0.048mm
35 mesh	425μm	0.425mm	325 mesh	45μm	0.045mm
40 mesh	380μm	0.38mm	400 mesh	38μm	0.038mm
42 mesh	355μm	0.355mm	500 mesh	25μm		0.025mm
45 mesh	325μm	0.325mm	600 mesh	23μm		0.023mm
48 mesh	300μm	0.3mm	800 mesh	18μm		0.018mm
50 mesh	270μm	0.27mm	1000 mesh	13μm		0.013mm
60 mesh	250μm	0.25mm	1340 mesh	10μm		0.01mm
65 mesh	230μm	0.23mm	2000 mesh	6.5μm		0.0065mm
70 mesh	212μm	0.212mm	5000 mesh	2.6μm		0.0026mm
80 mesh	180μm	0.18mm	8000 mesh	1.6μm		0.0016mm
90 mesh	160μm	0.16mm	1000 mesh	1.3μm		0.0013mm

Since wires of different thicknesses are used when weaving screens, there are differences in opening rates, so different countries adopt different standards. The United States, Britain and Japan have their own standards. The American and British standards are similar, but the Japanese standards are quite different. In China, we use the American standard, so we can use the formula mentioned earlier to calculate it.

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