Mesh to Micron Converter

Convert

Value

200 mesh opening74 µm

Millimeters: 0.074 mm
Inches: 0.0029 in

Mesh	Microns
4	4760
8	2380
10	2000
16	1190
20	841
30	595
40	420
50	297
60	250
80	177
100	149
120	125
140	105
170	88
200	74
230	63
270	53
325	44
400	37
500	25

US standard sieve series; values between listed sizes are interpolated.

Convert screen and sieve mesh numbers to opening size in microns (µm) and millimeters, or find the mesh for a particle size.

How to use the Mesh to Micron Converter

Choose mesh → microns or microns → mesh.
Enter the value.
Read the equivalent opening size.

How it works

Mesh is the number of openings per linear inch of screen; the opening size depends on wire thickness too, so standard sieve series define exact openings. Values here follow the US standard sieve series (ASTM E11): No. 200 mesh = 74 µm, No. 100 = 149 µm. Mesh sizes are used for filters, sand and powders, coffee grinding and kief screens.

Frequently asked questions

What is 200 mesh in microns?

74 µm.

What mesh is 100 microns?

About 140 mesh.

Is higher mesh finer?

Yes — more openings per inch means smaller openings.

How big is a micron?

One thousandth of a millimeter; a human hair is about 50–100 microns thick.

What mesh is fine sand?

Fine sand is about 60–200 mesh (250–74 µm).