Convert Micrometers (μm) to Millimeters (mm)
Enter a value below to convert Micrometers (μm) to Millimeters (mm).
Conversion:
1 Micrometers (μm) = 0.001 Millimeters (mm)
How to Convert Micrometers (μm) to Millimeters (mm)
1 um = 0.001 mm
1 mm = 1000 um
Example: convert 15 Micrometers (μm) to Millimeters (mm):
25 um = 0.025 mm
Micrometers (μm) to Millimeters (mm) Conversion Table
| Micrometers (μm) | Millimeters (mm) |
|---|---|
| 0.01 um | 0.00001 mm |
| 0.1 um | 0.0001 mm |
| 1 um | 0.001 mm |
| 2 um | 0.002 mm |
| 3 um | 0.003 mm |
| 5 um | 0.005 mm |
| 10 um | 0.01 mm |
| 20 um | 0.02 mm |
| 50 um | 0.05 mm |
| 100 um | 0.1 mm |
| 1000 um | 1 mm |
Micrometers (μm)
Definition
A micrometer (μm), also called a micron, is a metric unit of length equal to one millionth of a meter (10⁻⁶ m).
History
The micrometer gained prominence in the 19th century with the development of precision optics and microscopy. The term 'micron' was officially revoked by the SI in 1967, though it remains in common use.
Current use
Micrometers are used in biology (cell sizes: 1–100 μm), materials science (thin film thickness), manufacturing (surface roughness), and air quality measurement (PM2.5 refers to particles ≤2.5 μm).
Millimeters (mm)
Definition
A millimeter (mm) is a metric unit of length equal to one thousandth of a meter (0.001 m). There are 10 millimeters in a centimeter.
History
The millimeter derives from the metric system established in France in 1795. It became widely used in engineering and manufacturing as precision requirements increased during the Industrial Revolution.
Current use
Millimeters are standard in engineering drawings, precision machining, medical measurements (tumor sizes), rainfall measurement, and small-scale construction specifications worldwide.