Mesh count conversion table

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

“Mesh count” refers to the number of openings per square inch on a sieve screen. For example, 50 mesh means there are 50×50 openings per square inch, while 500 mesh has 500×500 openings, indicating smaller apertures with a higher mesh count. The mesh count is also used to represent the particle size that can pass through the sieve screen, where a higher mesh count indicates a smaller particle size.

The mesh count corresponds to the number of holes, that is, the number of openings per square inch. A higher mesh count results in smaller apertures. Generally, the product of the mesh count and the aperture size (in micrometers) is around 15,000. For instance, a 400 mesh sieve screen has an aperture size of approximately 38 micrometers, while a 500 mesh sieve screen has an aperture size of around 30 micrometers.

Due to variations in aperture size caused by different thread thicknesses used during the weaving process, different countries adopt varying standards, including the United States, the United Kingdom, and Japan. Among them, the standards in the United States and the United Kingdom are similar, while Japan’s standard differs significantly. China adopts the United States standard, which allows for calculations using the formula provided above.