How Big is a Micron?

What is a Micron?

A micron, or micrometer/micrometre or µm, is a measurement used in sciences, industry, and English speaking countries.

Why use Micron as a Measurement?

Have you ever had to measure something that is so small it doesn't make sense to measure in centimeters or millimeters? That is where microns come in.

Micron in mm and micron in inches

How Big is a Micron?

1 micron is the same as .00003937 inches, or 0.001 mm.

Between 1 μm and 10 μm:

  • 1–10 μm – length of a typical bacterium
  • 3–8 μm – width of a spider's web
  • ~10 μm – diameter of a rain droplet

Over 10 μm:

  • 10 to 55 μm – width of wool fiber
  • 17 to 181 μm – diameter of human hair
  • 70 to 180 μm – thickness of paper
  • 19,053 μm - diameter of American Penny

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