Micrometres to Millimetres Converter
Convert micrometres (µm) to millimetres (mm) instantly. Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles.
Result
- Millimetres
- 0.001 mm
How to use the micrometres to millimetres converter
- Enter the micrometres (µm).
- The results update as you type, or press Calculate.
- Read the millimetres first, then the supporting figures below it.
Formula
Millimetres = micrometres × 0.001
Worked example
For example, with these inputs:
- Micrometres (µm): 1
the calculator returns:
- Millimetres: 0.001 mm
Micrometres to Millimetres table
| Micrometres | Millimetres |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 5 µm | 0.005 mm |
| 10 µm | 0.01 mm |
| 20 µm | 0.02 mm |
| 25 µm | 0.025 mm |
| 50 µm | 0.05 mm |
| 100 µm | 0.1 mm |
| 250 µm | 0.25 mm |
| 500 µm | 0.5 mm |
| 1,000 µm | 1 mm |
About this conversion
Length conversions come up when reading overseas furniture specs, cycling the Round Island Route in kilometres while a foreign app shows miles, or checking marine distances in the Singapore Strait in nautical miles.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Frequently asked questions
How many millimetres are in one micrometre?
1 µm = 0.001 mm.
How do I convert µm to mm?
Millimetres = micrometres × 0.001.