Micrometers to millimeters
Type a value in µm to get it in mm instantly.
Nothing on our list is smaller: an ant is 50× longer. Walking, you would cover that in 0.07143 milliseconds.
Convert the other way: mm to µm
What it means
How long is that?
Reference lengths are typical values. The inch, foot, yard and mile are defined exactly in meters (1 inch = 2.54 cm).
The math
How to convert µm to mm
To convert micrometers to millimeters, multiply by 0.001.
Example: 100 µm × 0.001 = 0.1 mm.
In the other direction, 1 mm = 1,000 µm.
Every unit
Your length in every unit
Tables
µm to mm conversion table
| µm | mm |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 3 µm | 0.003 mm |
| 5 µm | 0.005 mm |
| 10 µm | 0.01 mm |
| 15 µm | 0.015 mm |
| 20 µm | 0.02 mm |
| 25 µm | 0.025 mm |
| 30 µm | 0.03 mm |
| 50 µm | 0.05 mm |
| 75 µm | 0.075 mm |
| 100 µm | 0.1 mm |
| 150 µm | 0.15 mm |
| 200 µm | 0.2 mm |
| 500 µm | 0.5 mm |
| 1,000 µm | 1 mm |
mm to µm conversion table
| mm | µm |
|---|---|
| 1 mm | 1,000 µm |
| 2 mm | 2,000 µm |
| 3 mm | 3,000 µm |
| 5 mm | 5,000 µm |
| 10 mm | 10,000 µm |
| 15 mm | 15,000 µm |
| 20 mm | 20,000 µm |
| 25 mm | 25,000 µm |
| 30 mm | 30,000 µm |
| 50 mm | 50,000 µm |
| 75 mm | 75,000 µm |
| 100 mm | 100,000 µm |
| 150 mm | 150,000 µm |
| 200 mm | 200,000 µm |
| 500 mm | 500,000 µm |
| 1,000 mm | 1,000,000 µm |
Quick answers
Quick answers
- How many mm is 1 µm?
- 1 µm is 0.001 mm.
- How many mm is 10 µm?
- 10 µm is 0.01 mm.
- How many mm is 100 µm?
- 100 µm is 0.1 mm.
The units
About these units
Micrometers (µm)
A micrometer is a thousandth of a millimeter, also called a micron. Bacteria, fibers and machining tolerances are measured in it.
Millimeters (mm)
A millimeter is a thousandth of a meter, roughly the thickness of a credit card. It is the everyday unit of engineering drawings and rainfall.
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