Convert Micrometre to Millimetre
Instantly convert Micrometre (µm) to Millimetre (mm). Free and accurate.
About This Conversion
What is a Micrometre to Millimetre conversion?
One micrometre (µm) is equal to 0.001 millimetre (mm). This relationship is fixed by international measurement standards and does not change. To convert any number of micrometre to millimetre, multiply your value by 0.001; to go the other way, divide by 0.001.
How to convert Micrometre to Millimetre
The conversion formula is: 1 µm = 0.001 mm. Enter any value into the converter above and the result updates instantly. The formula is also shown alongside the answer so you can check the working or use it in your own calculations.
Where is this conversion used?
Length conversions are needed in construction, interior design, navigation, athletics, and everyday shopping — particularly when switching between metric and imperial products. Engineers, architects, surveyors, scientists, and runners regularly convert between units of length. Metric units (metres, kilometres) are the global standard, while miles, feet, and inches remain common in the United States and, to some degree, the United Kingdom.
Helpful tip
When measuring fabric, timber, or piping, always double-check which unit system your supplier uses before placing an order — a mix-up between feet and metres can be costly.
Formula
1 µm = 0.001 mm
µm to mm Conversion Table
| µm | mm |
|---|---|
| 0.1 µm | 0.0001 mm |
| 0.5 µm | 0.0005 mm |
| 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 |
| 1000 µm | 1 mm |