Mesh, Particle Size(in mm and microns/μm) - Conversion Table, How to Read and Write, Formula for Powder and Particles
Conversion tabel, how to read and write and the formula of Mesh and Sieve Size in mm and microns
Japanese English
■ Particle Size/Opening - conversion talbe of mesh, mm and microns
ASTM | Tyler | Former-JIS |
Mesh | Opening μm/micron | Opening mm | Mesh | Opening μm/micron | Opening mm | Opening μm/micron | Opening mm |
3.5 | 5660 | 5.66 | 3.5 | 5613 | 5.613 | 5660 | 5.66 |
4 | 4760 | 4.76 | 4 | 4698 | 4.698 | 4760 | 4.76 |
5 | 4000 | 4 | 5 | 3962 | 3.962 | 4000 | 4 |
6 | 3360 | 3.36 | 6 | 3327 | 3.327 | 3360 | 3.36 |
7 | 2830 | 2.83 | 7 | 2794 | 2.794 | 2830 | 2.83 |
8 | 2380 | 2.38 | 8 | 2362 | 2.362 | 2380 | 2.38 |
10 | 2000 | 2 | 9 | 1981 | 1.981 | 2000 | 2 |
12 | 1680 | 1.68 | 10 | 1651 | 1.651 | 1680 | 1.68 |
14 | 1410 | 1.41 | 12 | 1397 | 1.397 | 1410 | 1.41 |
16 | 1190 | 1.19 | 14 | 1168 | 1.168 | 1190 | 1.19 |
18 | 1000 | 1 | 16 | 991 | 0.991 | 1000 | 1 |
20 | 841 | 0.841 | 20 | 833 | 0.833 | 840 | 0.84 |
25 | 707 | 0.707 | 24 | 701 | 0.701 | 710 | 0.71 |
30 | 595 | 0.595 | 28 | 589 | 0.589 | 590 | 0.59 |
35 | 500 | 0.5 | 32 | 495 | 0.495 | 500 | 0.5 |
40 | 420 | 0.42 | 35 | 417 | 0.417 | 420 | 0.42 |
45 | 354 | 0.354 | 42 | 351 | 0.351 | 350 | 0.35 |
50 | 297 | 0.297 | 48 | 295 | 0.295 | 297 | 0.297 |
60 | 250 | 0.25 | 60 | 246 | 0.246 | 250 | 0.25 |
70 | 210 | 0.21 | 65 | 208 | 0.208 | 210 | 0.21 |
80 | 177 | 0.177 | 80 | 175 | 0.175 | 177 | 0.177 |
100 | 149 | 0.149 | 100 | 147 | 0.147 | 149 | 0.149 |
120 | 125 | 0.125 | 115 | 124 | 0.124 | 125 | 0.125 |
140 | 105 | 0.105 | 150 | 104 | 0.104 | 105 | 0.105 |
170 | 88 | 0.088 | 170 | 88 | 0.088 | 88 | 0.088 |
200 | 74 | 0.074 | 200 | 74 | 0.074 | 74 | 0.074 |
230 | 63 | 0.063 | 250 | 61 | 0.061 | 63 | 0.063 |
270 | 53 | 0.053 | 270 | 53 | 0.053 | 53 | 0.053 |
325 | 44 | 0.044 | 325 | 43 | 0.043 | 44 | 0.044 |
400 | 37 | 0.037 | 400 | 33 | 0.033 | 37 | 0.037 |
Foramula of Opening(mm), Wire Diameter, and Mesh
A: Opening(mm)
d: Wire Diameter(mm)
M: Mesh
[[ Formula ]]
A = 25.4/M - d
■ How to read and write Mesh, Particle Size(mm, microns)
- "+200mesh" means that particle size is larger/more coarse than 200mesh(or 74microns).
- "-200mesh" means that particle size is smaller/finer than 200 mesh(or 74 microns).
- ">74μm" means that particles size is larger than 74 microns(or 200 mesh).
- "<74μm" means that particles size is smaller than 74 microns(or 200 mesh).
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