Ion Exchange Resin Mesh Size Number to Millimeter (mm) Conversion Table

Chromatography Ion Exchange Resins are often sold based on Mesh Size Number. Here is a table showing the conversion to particle size in microns or millimeters.

Mesh Size / Number	Particle Size (mm)
1250	0.010
625	0.020
550	0.025
400	0.037
325	0.044
270	0.053
230	0.063
200	0.075
170	0.090
140	0.106
120	0.125
100	0.150
80	0.180
70	0.212
60	0.250
50	0.300
45	0.355
40	0.425
35	0.500
30	0.600
25	0.710
20	0.850
18	1.000
16	1.180
14	1.400
12	1.700
10	2.000
8	2.360
6	3.350
4	4.750