Convert micrometers to millimeters
Convert micrometers (µm) to millimeters (mm). 1 µm = 0.001 mm, and 1 mm = 1,000 µm.
Micrometers to MM formula
mm = µm × 0.001
Multiply the number of micrometers by 0.001.
Example: To convert 1 µm to millimeters: 1 × 0.001 = 0.001 mm.
Quick answers
- What is 1 µm in millimeters?
- 1 µm = 0.001 mm
- What is 100 µm in millimeters?
- 100 µm = 0.1 mm
Micrometers to MM conversion table
MM to Micrometers table| micrometers (µm) | millimeters (mm) |
|---|---|
| 1 µm | 0.001 mm |
| 5 µm | 0.005 mm |
| 10 µm | 0.01 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 |
Frequently asked questions
How many micrometers are in a millimeter?
There are 1,000 micrometers in a millimeter (1 mm = 1,000 µm), so 1 µm = 0.001 mm.
How do I convert micrometers to millimeters?
Multiply the number of micrometers by 0.001. To convert 1 µm to millimeters: 1 × 0.001 = 0.001 mm.
Is the Micrometers to MM conversion exact?
Yes. Both units are defined exactly, so 1 micrometer is exactly 0.001 millimeters. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.
What is 1 µm in millimeters?
1 µm = 0.001 mm.
How do I convert millimeters back to micrometers?
Use the reverse relationship: 1 mm = 1,000 µm. The MM to Micrometers page has a converter and a full table.
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