How to convert micrometers to millimeters
To convert micrometers (µm) to millimeters (mm), multiply the value in micrometers by 0.001.
mm = µm × 0.001
Example: 10 µm = 0.01 mm.
You can also type 10 µm to mm into the smart calculator, or mix units: 1 µm + 1 mm.
Micrometers to Millimeters conversion table
| Micrometers | Millimeters |
|---|---|
| 0.01 µm | 0.00001 mm |
| 0.1 µm | 0.0001 mm |
| 0.25 µm | 0.00025 mm |
| 0.5 µm | 0.0005 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 |
| 75 µm | 0.075 mm |
| 100 µm | 0.1 mm |
| 250 µm | 0.25 mm |
| 500 µm | 0.5 mm |
| 1,000 µm | 1 mm |
Converting millimeters back to micrometers
1 mm = 1,000 µm. See the Millimeters to Micrometers converter, or press the swap button above.
About the units
Micrometer (µm)
One millionth of a meter, also called a micron.
Millimeter (mm)
One thousandth of a meter. Ten millimeters make a centimeter.
Length measures distance in one dimension. The SI base unit is the meter, defined by the distance light travels in a vacuum in 1/299,792,458 of a second. Since the 1959 international yard and pound agreement, imperial and US customary lengths are defined exactly in meters: an inch is exactly 2.54 centimeters.
Questions and answers
How many millimeters are in a micrometer?
One micrometer (µm) equals 0.001 millimeters (mm).
How do I convert micrometers to millimeters?
To convert micrometers to millimeters, multiply the value in micrometers by 0.001. The formula is mm = µm × 0.001. For example, 10 µm = 0.01 mm.
What is 10 µm in mm?
10 micrometers is 0.01 millimeters.
Which is bigger, a micrometer or a millimeter?
A millimeter is bigger: 1 mm = 1,000 µm.
How many centimeters are in a foot?
A foot is exactly 30.48 centimeters, because an inch is defined as exactly 2.54 cm and a foot is 12 inches.
Does this µm to mm converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.