Micrometers to Millimeters
Convert micrometers (µm) to millimeters (mm). Type in either box; the other updates as you go.
How to convert micrometers to millimeters
To convert micrometers to millimeters, multiply the number of micrometers by 0.001.
Example
Convert 5 micrometers to millimeters:
Micrometer to millimeter conversion chart
| Micrometers (µm) | Millimeters (mm) |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 3 µm | 0.003 mm |
| 4 µm | 0.004 mm |
| 5 µm | 0.005 mm |
| 6 µm | 0.006 mm |
| 7 µm | 0.007 mm |
| 8 µm | 0.008 mm |
| 9 µm | 0.009 mm |
| 10 µm | 0.01 mm |
| 12 µm | 0.012 mm |
| 15 µm | 0.015 mm |
| 20 µm | 0.02 mm |
| 25 µm | 0.025 mm |
| 30 µm | 0.03 mm |
| 40 µm | 0.04 mm |
| 50 µm | 0.05 mm |
| 60 µm | 0.06 mm |
| 70 µm | 0.07 mm |
| 75 µm | 0.075 mm |
| 80 µm | 0.08 mm |
| 90 µm | 0.09 mm |
| 100 µm | 0.1 mm |
| 150 µm | 0.15 mm |
| 200 µm | 0.2 mm |
| 250 µm | 0.25 mm |
| 500 µm | 0.5 mm |
| 1,000 µm | 1 mm |
Going the other way? See the millimeters to micrometers chart.
About the units
Micrometer (µm)
A micrometer (micron) is one millionth of a meter. Bacteria, fibers and manufacturing tolerances are measured in micrometers.
Millimeter (mm)
A millimeter is one thousandth of a meter. It is the unit on engineering drawings, rainfall gauges and the small marks of a metric ruler.
Frequently asked questions
How many millimeters are in a micrometer?
There are 0.001 millimeters in a micrometer.
How many micrometers are in a millimeter?
There are 1,000 micrometers in a millimeter.
How do you convert micrometers to millimeters?
To convert micrometers to millimeters, multiply the number of micrometers by 0.001.
What is 5 micrometers in millimeters?
5 micrometers equals 0.005 millimeters.
Convert between metric and imperial units of length and distance, from millimeters to miles. Open the length converter to see a value in every unit at once.