Convert Micrometers to millimeters
1 micrometer = 0.001 millimeters · mm = µm ÷ 1,000
When you need this conversion
Manufacturing tolerances, coating thickness, and filtration ratings are specified in micrometers, while the parts themselves are dimensioned in millimeters. Air filter and water filter ratings are a common consumer case.
Micrometers to millimeters conversion table
| Micrometers (µm) | Millimeters (mm) |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 3 µm | 0.003 mm |
| 5 µm | 0.005 mm |
| 10 µm | 0.01 mm |
| 15 µm | 0.015 mm |
| 20 µm | 0.02 mm |
| 25 µm | 0.025 mm |
| 50 µm | 0.05 mm |
| 75 µm | 0.075 mm |
| 100 µm | 0.1 mm |
| 250 µm | 0.25 mm |
| 500 µm | 0.5 mm |
| 1,000 µm | 1 mm |
The formula
mm = µm ÷ 1,000Because both units measure length, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Millimeters to micrometers →Related length conversions
- Centimeters to inches
- Centimeters to feet
- Meters to kilometers
- Kilometers to meters
- Inches to centimeters
- Feet to centimeters
- Feet to yards
- Yards to feet
- Centimeters to millimeters
- Meters to millimeters
- Kilometers to millimeters
- Inches to millimeters
Frequently asked questions
- How many millimeters are in a micrometer?
- There are 0.001 millimeters in 1 micrometer. The formula is mm = µm ÷ 1,000.
- How do you convert micrometers to millimeters?
- Use the formula mm = µm ÷ 1,000. For example, 10 micrometers equals 0.01 millimeters.
- Is the micrometers to millimeters conversion exact?
- Yes. Micrometers and millimeters are both units of length, related by an exact defined factor. Displayed results are rounded for readability.
- What is µm short for?
- µm is the standard symbol for micrometer (also written as microns). mm is the symbol for millimeter.