Convert Mils (thousandths of an inch) to Micrometers (μm)
Enter a value below to convert Mils (thousandths of an inch) to Micrometers (μm).
Conversion:
1 Mils (thousandths of an inch) = 25.4 Micrometers (μm)
How to Convert Mils (thousandths of an inch) to Micrometers (μm)
1 mil = 25.4 um
1 um = 0.03937007874 mil
Example: convert 15 Mils (thousandths of an inch) to Micrometers (μm):
25 mil = 635 um
Mils (thousandths of an inch) to Micrometers (μm) Conversion Table
| Mils (thousandths of an inch) | Micrometers (μm) |
|---|---|
| 0.01 mil | 0.254 um |
| 0.1 mil | 2.54 um |
| 1 mil | 25.4 um |
| 2 mil | 50.8 um |
| 3 mil | 76.2 um |
| 5 mil | 127 um |
| 10 mil | 254 um |
| 20 mil | 508 um |
| 50 mil | 1270 um |
| 100 mil | 2540 um |
| 1000 mil | 25400 um |
Mils (thousandths of an inch)
Definition
A mil (also called a thou) is an imperial unit of length equal to one thousandth of an inch (0.001 in or approximately 0.0254 mm).
History
The mil originated in manufacturing and engineering in English-speaking countries as a practical unit for measuring very thin materials. The name 'thou' derives from 'thousandth of an inch'.
Current use
Mils are used in manufacturing for measuring wire diameter, sheet metal thickness, printed circuit board (PCB) trace widths, paint and coating thickness, and plastic film thickness.
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).