Millimeter to Micrometer (mm to μm)
Convert mm to μm — Length converter
Also written as mm to um.
One millimeter equals 1000 μm, so to convert millimeters to micrometers you multiply the value by 1000. A millimeter is larger than a micrometer — going the other way, 1 μm = 0.001 mm. For example, 10 mm = 10000 μm and 50 mm = 50000 μm.
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1 mm = 1000 μm
Millimeter to Micrometer formula
1 Millimeter = 1000 μm
Worked examples
- 25 mm = 25000 μm
- 100 mm = 100000 μm
Millimeter to Micrometer conversion table
| Millimeter (mm) | Micrometer (μm) |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 5 | 5000 |
| 8 | 8000 |
| 10 | 10000 |
| 12 | 12000 |
| 15 | 15000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |
Frequently asked questions
How many micrometers are in one millimeter?
One millimeter equals 1000 micrometers (μm).
How many millimeters are in one micrometer?
One micrometer equals 0.001 millimeters (mm).
How do you convert millimeters to micrometers?
1 Millimeter = 1000 μm. Use the calculator above for any value.
What is 5 mm in μm?
5 mm = 5000 μm.
What is 100 mm in μm?
100 mm = 100000 μm.
What is 10 mm in μm?
10 mm = 10000 μm.
What is 20 mm in μm?
20 mm = 20000 μm.
Is a millimeter bigger than a micrometer?
Yes. A millimeter is larger — one millimeter equals 1000 micrometers (μm).