Millimeters (mm) to Micrometers (μm) Conversion
Millimeters
The millimetre is a unit of length equal to one thousandth of a metre (10⁻³ m), derived using the SI prefix milli- (from Latin mille, thousand). It is the standard unit for precision measurements in engineering, manufacturing, and medicine, where tolerances are routinely specified to the nearest millimetre or fraction thereof. In meteorology, rainfall is universally measured in millimetres, where 1 mm of rainfall corresponds to 1 litre of water per square metre of surface area.
Micrometers
The micrometre (symbol μm), commonly called the micron, is a unit of length equal to one millionth of a metre (10⁻⁶ m) and is the standard scale for biological cells, bacterial dimensions, and thin-film technology. Human red blood cells measure approximately 6–8 μm in diameter, while the wavelength of visible light ranges from about 380 to 700 nm — just below the micrometre scale. In semiconductor manufacturing, feature sizes on integrated circuits are described in micrometres and nanometres.
| Millimeters (mm) | Micrometers (μm) |
|---|---|
| 0.1 mm | 100.00 μm |
| 1 mm | 1,000.00 μm |
| 2 mm | 2,000.00 μm |
| 3 mm | 3,000.00 μm |
| 5 mm | 5,000.00 μm |
| 10 mm | 10,000.00 μm |
| 20 mm | 20,000.00 μm |
| 30 mm | 30,000.00 μm |
| 50 mm | 50,000.00 μm |
| 100 mm | 100,000.00 μm |
| 1000 mm | 1,000,000.00 μm |
Frequently Asked Questions (FAQ)
How many micrometers are in 1 millimeters?
1 millimeters (mm) is exactly 1,000.00 micrometers (μm).
How do I convert millimeters to micrometers?
Multiply the value in millimeters by 1,000.00 to get the result in micrometers. Or use the converter above — type any number and see the result instantly.