1 mm = 1000 μm
1 Millimeter (mm) = 1000 Micrometer (μm).
If you want to reverse convert, use Micrometer → Millimeter. 1 μm = 0.001 mm. You can also explore the full Length converter page for more cross conversions.
Conversion formula
Millimeter to Micrometer formula: value in μm = value in mm × 1000.
Micrometer to Millimeter formula: value in mm = value in μm × 0.001.
How to convert Millimeter to Micrometer
To convert Millimeter to Micrometer, multiply the value in mm by 1000. This gives the result in μm.
For example, 1 mm = 1000 μm and 10 mm = 10000 μm.
What is Millimeter?
Millimeter (mm): One thousandth of a metre. Screw diameters, sheet thicknesses and small dimensions on technical drawings commonly use this finer scale. 1 mm = 0.1 cm = 0.001 m.
What is Micrometer?
Micrometer (μm): One millionth of a metre, also called a micron. It describes the sizes of cells, fine fibres and thin coatings. 1 μm = 0.001 mm = 10⁻⁶ m.
FAQ
How many micrometer are in 1 millimeter?
There are 1000 μm in 1 mm.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert millimeter to micrometer?
Multiply the value in mm by 1000 to get the value in μm.
Millimeter → other Length units
- 1 millimeter → meter = 0.001 meter
- 1 millimeter = 1.0E-6 kilometer
- 1 millimeter → decimeter = 0.01 decimeter
- 1 millimeter → centimeter = 0.1 centimeter
- 1 millimeter → micrometer = 1000 micrometer
- 1 millimeter = 1000000 nanometer
- 1 millimeter = 1000000000 picometer
- 1 millimeter = 5.3995680345572E-7 nautical mile
- 1 millimeter = 6.2137119223733E-7 mile
- 1 millimeter → fathom = 0.00054680664916885 fathom
- 1 millimeter → yard = 0.0010936132983377 yard
- 1 millimeter → feet = 0.0032808398950131 feet
- 1 millimeter → inch = 0.039370078740157 inch
- 1 millimeter → hand = 0.0098425196850394 hand
- 1 millimeter = 6.6845871222684E-15 astronomical unit
- 1 millimeter = 1.0570008340246E-19 lightyear
- 1 millimeter = 3.2407792894443E-20 parsec
Millimeter → Micrometer Table
The table below shows common values from Millimeter to Micrometer and the reverse direction for quick reference.
| mm | μm | Rounded |
|---|---|---|
| 1 mm | 1000 μm | 1000.0000 |
| 2 mm | 2000 μm | 2000.0000 |
| 3 mm | 3000 μm | 3000.0000 |
| 4 mm | 4000 μm | 4000.0000 |
| 5 mm | 5000 μm | 5000.0000 |
| 10 mm | 10000 μm | 10000.0000 |
| 12 mm | 12000 μm | 12000.0000 |
| 15 mm | 15000 μm | 15000.0000 |
| 20 mm | 20000 μm | 20000.0000 |
| 25 mm | 25000 μm | 25000.0000 |
| 30 mm | 30000 μm | 30000.0000 |
| 40 mm | 40000 μm | 40000.0000 |
| 50 mm | 50000 μm | 50000.0000 |
| 75 mm | 75000 μm | 75000.0000 |
| 100 mm | 100000 μm | 100000.0000 |
| 200 mm | 200000 μm | 200000.0000 |
| 250 mm | 250000 μm | 250000.0000 |
| 500 mm | 500000 μm | 500000.0000 |
| 750 mm | 750000 μm | 750000.0000 |
| 1000 mm | 1000000 μm | 1000000.0000 |
| 2500 mm | 2500000 μm | 2500000.0000 |
| 5000 mm | 5000000 μm | 5000000.0000 |
| 10000 mm | 10000000 μm | 10000000.0000 |
Micrometer → Millimeter Table
| μm | mm | Rounded |
|---|---|---|
| 1 μm | 0.001 mm | 0.0010 |
| 2 μm | 0.002 mm | 0.0020 |
| 3 μm | 0.003 mm | 0.0030 |
| 4 μm | 0.004 mm | 0.0040 |
| 5 μm | 0.005 mm | 0.0050 |
| 10 μm | 0.01 mm | 0.0100 |
| 12 μm | 0.012 mm | 0.0120 |
| 15 μm | 0.015 mm | 0.0150 |
| 20 μm | 0.02 mm | 0.0200 |
| 25 μm | 0.025 mm | 0.0250 |
| 30 μm | 0.03 mm | 0.0300 |
| 40 μm | 0.04 mm | 0.0400 |
| 50 μm | 0.05 mm | 0.0500 |
| 75 μm | 0.075 mm | 0.0750 |
| 100 μm | 0.1 mm | 0.1000 |
| 200 μm | 0.2 mm | 0.2000 |
| 250 μm | 0.25 mm | 0.2500 |
| 500 μm | 0.5 mm | 0.5000 |
| 750 μm | 0.75 mm | 0.7500 |
| 1000 μm | 1 mm | 1.0000 |
| 2500 μm | 2.5 mm | 2.5000 |
| 5000 μm | 5 mm | 5.0000 |
| 10000 μm | 10 mm | 10.0000 |
Micrometer → Millimeter
The reverse value is 1 μm = 0.001 mm.