Micrometer to Millimeter (μm to mm)
Convert μm to mm — Length converter
Also written as um to mm.
One micrometer equals 0.001 mm, so to convert micrometers to millimeters you multiply the value by 0.001. A micrometer is smaller than a millimeter — going the other way, 1 mm = 1000 μm. For example, 10 μm = 0.01 mm and 50 μm = 0.05 mm.
0.001Click to copy
1 μm = 0.001 mm
Micrometer to Millimeter formula
1 Micrometer = 0.001 mm
Worked examples
- 25 μm = 0.025 mm
- 100 μm = 0.1 mm
Micrometer to Millimeter conversion table
| Micrometer (μm) | Millimeter (mm) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 8 | 0.008 |
| 10 | 0.01 |
| 12 | 0.012 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Frequently asked questions
How many millimeters are in one micrometer?
One micrometer equals 0.001 millimeters (mm).
How many micrometers are in one millimeter?
One millimeter equals 1000 micrometers (μm).
How do you convert micrometers to millimeters?
1 Micrometer = 0.001 mm. Use the calculator above for any value.
What is 5 μm in mm?
5 μm = 0.005 mm.
What is 100 μm in mm?
100 μm = 0.1 mm.
What is 10 μm in mm?
10 μm = 0.01 mm.
What is 20 μm in mm?
20 μm = 0.02 mm.
Is a micrometer bigger than a millimeter?
No. A micrometer is smaller — one micrometer equals 0.001 millimeters, while one millimeter equals 1000 micrometers.