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Mesh to Micron Conversion Chart

Comparative Particle Size:

U.S. MeshInchesMicron
100.07872000
120.06611680
140.05551410
160.04691190
180.03941000
200.0331841
250.0280707
300.0232595
350.0197500
400.0165420
450.0138354
500.0117297
600.0098250
700.0083210
800.0070177
1000.0059149
1200.0049125
1400.0041105
1700.003588
2000.002974
2300.002463
2700.002153
3250.001744
4000.001537
5500.0009925
6250.0007920
12500.00039410
17500.0003158
25000.0001975
50000.0000992.5
120000.00003941

Linear Equivalents:

1 micron = .0000394 inches
25,400 microns = 1 inch
1,000 microns = 1 millimeter

Micron Size Comparisons:

Radius of a hydrogen atom = 0.00005 microns
Bacteria = 2 microns
Diameter of a red blood cell = 8 microns
Talcum powder = 10 microns
Diameter of a white blood cell = 25 microns
Naked-eye visibility threshold = 40 microns
Pollen = 60 microns
Diameter of a human hair, typical human = 70 microns
Table salt = 100 microns
Openings in window screen, typical screen = 1475 microns
(or .058 inches)
Distance needed for first down in football, “1st and ten”  = 9,144,000 microns
Distance needed for first down in football, after false start penalty  = 13,716,000 microns
Distance needed for first down in football, after holding penalty  = 18,288,000 microns
Highest elevation, Mt. Everest = 88,54,000,000 microns
Distance to the moon = 384,400,000,000,000 microns

Conversions:

1 cubic cm = .06102 cubic inches
1 cubic foot = 1,728 cubic inches
1 cubic foot = 7.48 gallons
1 cubic foot water = 62.42 lbs.
1 gallon = 3,785 cubic cm
1 gallon = 231 cubic inches
1 gallon water = 8.34 lbs.
1 gallon/min = .002228 cubic ft./sec
1 kg/sq. meter = .2048 lbs./sq. ft.