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Particle Size Chart for Industrial Filtration

Properly sizing your filtration system is critical for protecting downstream equipment and ensuring product quality. Below, you will find our standard conversion references to help you translate between US Mesh, Microns, Inches, and Millimeters.

        Rule of Thumb: Strainers vs. Filters

        Generally, particle retention larger than 40 microns (325 mesh) is considered "straining" (coarse filtration), while retention finer than 40 microns falls into the category of "filtering" (fine filtration).

Mesh to Micron Conversion Table

Use this data table to specify the correct screen or element size for your application.

Retention Type / US Mesh	Microns (µm)	Inches (in)	Millimeters (mm)
Coarse Filtration / Perforations
1/2" Perforation	12,700	0.500	12.700
1/4" Perforation	6,350	0.250	6.350
1/8" Perforation	3,175	0.125	3.175
1/16" Perforation	1,587	0.0625	1.587
1/32" Perforation	794	0.0312	0.794
Standard Wire Mesh Range
4 Mesh	4,760	0.1870	4.760
8 Mesh	2,380	0.0937	2.380
10 Mesh	2,000	0.0787	2.000
20 Mesh	841	0.0331	0.841
30 Mesh	595	0.0234	0.595
40 Mesh	420	0.0165	0.420
50 Mesh	297	0.0117	0.297
60 Mesh	250	0.0098	0.250
70 Mesh	210	0.0083	0.210
80 Mesh	177	0.0070	0.177
100 Mesh	149	0.0059	0.149
140 Mesh	105	0.0041	0.105
200 Mesh	74	0.0029	0.074
230 Mesh	63	0.0025	0.063
270 Mesh	53	0.0021	0.053
325 Mesh	44	0.0017	0.044
400 Mesh	37	0.0015	0.037
Ultra-Fine / Micro-Filtration Range
Ultra-Fine (No Mesh Equiv.)	25	0.0010	0.025
Ultra-Fine (No Mesh Equiv.)	15	0.0006	0.015
Ultra-Fine (No Mesh Equiv.)	10	0.00039	0.010
Ultra-Fine (No Mesh Equiv.)	5	0.00020	0.005
Ultra-Fine (No Mesh Equiv.)	2	0.00008	0.002
Ultra-Fine (No Mesh Equiv.)	1	0.00004	0.001

Not sure which retention size your system requires?

Our engineering team can help you select the exact strainer or filter based on your fluid type, flow rate, and target particle size.

Request Engineering Assistance

Relative Particle Size Spectrum

Visual comparison of common materials across the filtration spectrum.

Chart showing relative sizes of particles like sand, yeast, and bacteria in microns