Enquiry
Standard Table for Micron Sizes
Size Designation Normal Size Range
1/4 0-1/ 2
1/2 0-1
1 0-2
2 1-3
3 2-4
4 2-6
5 4-6
6 4-8
8 6-10
10 8-12
12 8-16
15 10-20
17 12-22
20 15-25
25 20-30
30 22-36
35 30-40
45 36-54
50 40-60
67 54-80
Wide Range
60 264
45 620
30 2,046
15 16,960
9 78,600
6 262,000
3 2,050,000
1 62,000,000
Conversion of U.S. Mesh into FEPA
U.S. Mesh FEPA
16/18 D-1181
18/20 D-1001
20/25 D-851
25/30 D-711
30/35 D-601
35/40 D-501
40/45 D-426
45/50 D-356
50/60 D-301
60/70 D-251
70/80 D-213
80/100 D-181
100/120 D-151
120/140 D-126
140/170 D-107
170/200 D-91
200/230 D-76
230/270 D-64
270/325 D-54
325/400 D-46
Wide Range
16/20 D-1182
20/30 D-852
30/40 D-602
40/50 D427
60/80 D252
Number of Particles per Carat
Sieve Size U.S. Mesh Micron Size Aprox. no. of particles per carat (0.2 gm)
16 1190 33
18 1000 57
20 841 97
25 707 160
30 595 282
35 500 460
40 420 770
45 354 1,334
50 297 2,080
60 250 3,240
70 210 6,140
80 177 10,400
100 149 17,140
120 125 20,920
140 105 49,400
170 88 83,400
200 74 140,000
230 63 252,000
270 53 384,000
325 44 660,000
400 37 1,130,000
Conversion of Micron into US Mesh
Micron U.S. Mesh
80-125 270/325
54-80 325/400
40-60 400/500
30-40 500/600
20-40 500/800
20-30 600/800
10-20 1200
8-12 1800
5-10 2200
4-8 3000
2-4 8000
1-2 13000
0-1 60000
0-1/2 100000