Length converter
Convert Microns to Thousandths of an Inch (um to thou)
1 um = 0.03937 thou. Surface finish and film thickness specs across unit systems.
Microns to thousandths of an inch conversion table
| um | thou |
|---|---|
| 1 um | 0.03937 thou |
| 2 um | 0.07874 thou |
| 3 um | 0.11811 thou |
| 4 um | 0.15748 thou |
| 5 um | 0.19685 thou |
| 6 um | 0.23622 thou |
| 7 um | 0.275591 thou |
| 8 um | 0.314961 thou |
| 9 um | 0.354331 thou |
| 10 um | 0.393701 thou |
| 15 um | 0.590551 thou |
| 20 um | 0.787402 thou |
| 25 um | 0.984252 thou |
| 30 um | 1.1811 thou |
| 40 um | 1.5748 thou |
| 50 um | 1.9685 thou |
| 75 um | 2.9528 thou |
| 100 um | 3.937 thou |
| 150 um | 5.9055 thou |
| 200 um | 7.874 thou |
| 250 um | 9.8425 thou |
| 500 um | 19.685 thou |
| 1000 um | 39.3701 thou |
How to convert microns to thousandths of an inch
Multiply the value in microns by 0.03937 to get thousandths of an inch. 1 um equals 0.03937 thou, and 1 thou equals 25.4 um.
About these units
The micron (micrometer) is one millionth of a meter. Surface finish, plating thickness, filtration ratings, and semiconductor features are specified in microns.
A thou (or mil) is one thousandth of an inch, written 0.001 in. Machinists quote fits, shim sizes, and coating thicknesses in thou.
Common questions
How many thousandths of an inch are in a micron?
1 um equals 0.03937 thou.
How do you convert microns to thousandths of an inch?
Use thou = um ÷ 25.4. So 1 um = 0.03937 thou, and to go back, 1 thou = 25.4 um.
What is 10 um in thou?
10 um equals 0.393701 thou.
What is 100 um in thou?
100 um equals 3.937 thou.