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Calculators > Mesh / Micron Sizing Table

Below is a handy chart that shows US Mesh to Micron conversions. The mesh size referenced indicates the pore openings in the desired filter bag material.

U.S. MESH INCHES MICRONS MILLIMETERS 3 0.265 6730 6.73 4 0.187 4760 4.76 5 0.157 4000 4 6 0.132 3360 3.36 7 0.111 2830 2.83 8 0.0937 2380 2.38 10 0.0787 2000 2 12 0.0661 1680 1.68 14 0.0555 1410 1.41 16 0.0469 1190 1.19 18 0.0394 1000 1 20 0.0331 841 0.841 25 0.028 707 0.707 30 0.0232 595 0.595 35 0.0197 500 0.5

U.S. MESH INCHES MICRONS MILLIMETERS 40 0.0165 400 0.4 45 0.0138 354 0.354 50 0.0117 297 0.297 60 0.0098 250 0.25 70 0.0083 210 0.21 80 0.007 177 0.177 100 0.0059 149 0.149 120 0.0049 125 0.125 140 0.0041 105 0.105 170 0.0035 88 0.088 200 0.0029 74 0.074 230 0.0024 63 0.063 270 0.0021 53 0.053 325 0.0017 44 0.044 400 0.0015 37 0.037