| Particle Size Table | |||||
| US Mesh | Inches | Microns | Millimeters | Mils | Hegman |
| 0.0000 | 0 | 0 | 0 | 8 | |
| 0.00025 | 6.4 | 0.0064 | 0.25 | 7 1/2 | |
| 1200 | 0.0004 | 10.2 | 0.0102 | 0.4 | |
| 0.0005 | 12.7 | 0.127 | 0.5 | 7 | |
| 0.00075 | 19.1 | 0.0191 | 0.75 | 6 1/2 | |
| 625 | 0.0008 | 20.3 | 0.0203 | 0.8 | 6 |
| 0.001 | 25.4 | 0.0254 | 1.0 | 6 | |
| 0.0012 | 30.5 | 0.0305 | 1.2 | ||
| 0.0125 | 31.8 | 0.0318 | 1.25 | 5 1/2 | |
| 400 | 0.0015 | 38.1 | 0.0381 | 1.5 | 5 |
| 0.0016 | 40.6 | 0.0406 | 1.6 | ||
| 325 | 0.00175 | 44.5 | 0.0445 | 1.75 | 4 1/2 |
| 0.002 | 50.8 | 0.0508 | 2.0 | 4 | |
| 270 | 0.0021 | 53.3 | 0.0533 | 2.1 | |
| 0.00225 | 57.2 | 0.0572 | 2.25 | 3 1/2 | |
| 230 | 0.0024 | 61.0 | 0.0610 | 2.4 | |
| 0.0025 | 63.5 | 0.0635 | 2.5 | ||
| 0.00275 | 69.9 | 0.0699 | 2.75 | 2 1/2 | |
| 0.0028 | 71.1 | 0.0711 | 2.8 | ||
| 200 | 0.0029 | 73.7 | 0.0737 | 2.9 | |
| 0.003 | 76.2 | 0.0762 | 3.0 | 2 | |
| 0.0032 | 81.3 | 0.0813 | 3.2 | ||
| 0.00325 | 82.6 | 0.0826 | 3.25 | 11/2 | |
| 170 | 0.0035 | 88.9 | 0.0889 | 3.5 | 1 |
| 0.00375 | 95.3 | 0.0953 | 3.75 | 1/2 | |
| 140 | 0.004 | 101.6 | 0.1016 | 4.0 | 0 |
| 120 | 0.0049 | 125 | 0.125 | 4.9 | |
| 100 | 0.0059 | 149 | 0.149 | 5.9 | |
| 80 | 0.0070 | 177 | 0.177 | 7.0 | |
| 70 | 0.0083 | 210 | 0.210 | 8.3 | |
| 60 | 0.0098 | 250 | 0.250 | 9.8 | |
| 50 | 0.0117 | 297 | 0.297 | 11.7 | |
| 45 | 0.0138 | 350 | 0.350 | 13.8 | |
| 40 | 0.0165 | 420 | 0.420 | 16.5 | |
| 35 | 0.0197 | 500 | 0.500 | 19.7 | |
| 30 | 0.0232 | 590 | 0.590 | 23.2 | |
| 25 | 0.0280 | 710 | 0.710 | 28.2 | |
| 20 | 0.0331 | 840 | 0.840 | 33.1 | |
| 18 | 0.0394 | 1000 | 1.000 | 39.4 | |
| 16 | 0.0469 | 1190 | 1.190 | 46.9 | |
| 14 | 0.0555 | 1410 | 1.410 | 55.5 | |
| 12 | 0.0661 | 1680 | 1.680 | 66.1 | |
| 10 | 0.0787 | 2000 | 2.000 | 78.7 | |
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