Length converter
Convert Thousandths of an Inch to Microns (thou to um)
1 thou = 25.4 um. Surface finish and film thickness specs across unit systems.
Thousandths of an inch to microns conversion table
| thou | um |
|---|---|
| 1 thou | 25.4 um |
| 2 thou | 50.8 um |
| 3 thou | 76.2 um |
| 4 thou | 101.6 um |
| 5 thou | 127 um |
| 6 thou | 152.4 um |
| 7 thou | 177.8 um |
| 8 thou | 203.2 um |
| 9 thou | 228.6 um |
| 10 thou | 254 um |
| 15 thou | 381 um |
| 20 thou | 508 um |
| 25 thou | 635 um |
| 30 thou | 762 um |
| 40 thou | 1016 um |
| 50 thou | 1270 um |
| 75 thou | 1905 um |
| 100 thou | 2540 um |
| 150 thou | 3810 um |
| 200 thou | 5080 um |
| 250 thou | 6350 um |
| 500 thou | 12700 um |
| 1000 thou | 25400 um |
How to convert thousandths of an inch to microns
Multiply the value in thousandths of an inch by 25.4 to get microns. 1 thou equals 25.4 um, and 1 um equals 0.03937 thou.
About these units
A thou (or mil) is one thousandth of an inch, written 0.001 in. Machinists quote fits, shim sizes, and coating thicknesses in thou.
The micron (micrometer) is one millionth of a meter. Surface finish, plating thickness, filtration ratings, and semiconductor features are specified in microns.
Common questions
How many microns are in a thousandth of an inch?
1 thou equals 25.4 um.
How do you convert thousandths of an inch to microns?
Use um = thou × 25.4. So 1 thou = 25.4 um, and to go back, 1 um = 0.03937 thou.
What is 10 thou in um?
10 thou equals 254 um.
What is 100 thou in um?
100 thou equals 2540 um.