1 micrometer (µm) = 0.001 millimeters (mm). To convert, divide by 1,000: mm = µm ÷ 1,000. For example, 500 µm = 0.5 mm.
mm = µm ÷ 1,000
Micrometers to millimeters table
| Micrometers (µm) | Millimeters (mm) |
|---|---|
| 100 | 0.1 |
| 200 | 0.2 |
| 300 | 0.3 |
| 400 | 0.4 |
| 500 | 0.5 |
| 1,000 | 1 |
| 2,000 | 2 |
| 2,500 | 2.5 |
| 5,000 | 5 |
| 10,000 | 10 |
| 25,000 | 25 |
| 50,000 | 50 |
| 100,000 | 100 |
The two units
Micrometer (µm). One millionth of a meter, also called a micron.
Millimeter (mm). One thousandth of a meter.
Because both units are defined in terms of the same base unit, the factor 0.001 is exact, not a rounded measurement.
Convert micrometers to other units
- Micrometers to meters — 1 µm = 0.000001 m
- Micrometers to kilometers — 1 µm = 1e-9 km
- Micrometers to centimeters — 1 µm = 0.0001 cm
- Micrometers to nanometers — 1 µm = 1,000 nm
- Micrometers to miles — 1 µm = 6.213712e-10 mi
- Micrometers to yards — 1 µm = 0.0000010936 yd
- Micrometers to feet — 1 µm = 0.0000032808 ft
- Micrometers to inches — 1 µm = 0.0000393701 in
- Micrometers to nautical miles — 1 µm = 5.399568e-10 nmi
Convert other units to millimeters
Questions people ask
- How many millimeters are in a micrometer?
- 0.001, exactly.
- How do you convert micrometers to millimeters?
- mm = µm ÷ 1,000. It is the same as dividing by 1,000.
- How do you convert millimeters back to micrometers?
- µm = mm × 1,000. See millimeters to micrometers.
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