Mesh to Micron Converter

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Choose whether you are converting a mesh number to microns, or finding the nearest standard mesh for a particle size in microns.
The number of openings per linear inch. Standard ASTM E11 sizes range from 3.5 to 635.
Sieve openingFine
75µm

Nominal opening in micrometers (ASTM E11)

Opening (mm)0.075mm
Opening (in)0.003in
75 µm
Ultrafine<45Fine45-150Medium150-500Coarse500-2000Very coarse2000+

200 mesh = 75 µm (0.075 mm)

  • This sieve retains particles larger than 75 µm and passes those smaller.
  • That opening is about 1.1 times the width of a human hair (~70 µm).
  • This falls in the fine-powder range.
  • In inches the opening is 0.0030 in.

Next stepFor pharmaceutical or food-grade applications, verify the actual opening against your lot-specific sieve calibration certificate rather than the nominal ASTM value.

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