µm to mm
92 unitsResult1.000000e-3
0.001mm
1 µm × 0.001 = 0.001 mm
Convert Micrometer to Millimeter (µm to mm)
1 micrometer = 0.001 millimeters. Convert micrometers to millimeters instantly, with the exact factor, the formula and a reference table of common values.
Formula
millimeters = micrometers × 0.001
µm to mm conversion table
| µm | mm |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 3 µm | 0.003 mm |
| 5 µm | 0.005 mm |
| 10 µm | 0.01 mm |
| 20 µm | 0.02 mm |
| 50 µm | 0.05 mm |
| 100 µm | 0.1 mm |
| 250 µm | 0.25 mm |
| 500 µm | 0.5 mm |
| 1000 µm | 1 mm |
What is a micrometer?
A micrometer, also called a micron, is one millionth of a meter. That is a thousand times smaller than a millimeter, far below what your eye can pick out on its own.
Micrometers describe things seen through a microscope: a human hair is roughly 70 micrometers thick, a red blood cell is about 8, and the dust particles an air filter traps are measured in single microns.
In writing, the micrometer is usually shortened to "µm". One micrometer is 0.000001 meters, and that ratio is what every figure on this page is built from.