1 micrometer = 0.001 millimeters
Convert micrometers to millimeters.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
1 row could not be read rows could not be read
The formula
mm = µm × 0.001
Worked through with a real value: 10 micrometers = 0.01 millimeters.
Going the other way: µm = mm × 1000, so 1 millimeter = 1000 micrometers.
What each unit is
- micrometer µm
- A millionth of a metre, also called a micron. Human hair is roughly 70 of them across.
- millimeter mm
- A thousandth of a metre, and the working unit of engineering drawings, rainfall and camera focal lengths.
Where these come from
- 1 micrometer = 1e-06 meters
- 1 millimeter = 0.001 meters
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| micrometers (µm) | millimeters (mm) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 75 | 0.075 |
| 100 | 0.1 |
| millimeters (mm) | micrometers (µm) |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 5 | 5000 |
| 6 | 6000 |
| 7 | 7000 |
| 8 | 8000 |
| 9 | 9000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 75 | 75000 |
| 100 | 100000 |
Questions
How many millimeters are in a micrometer?
1 micrometer = 0.001 millimeters.
How do I convert micrometers to millimeters?
Use mm = µm × 0.001. For example, 10 micrometers = 0.01 millimeters.
How many micrometers are in one millimeter?
1 millimeter = 1000 micrometers.
What is 10 micrometers in millimeters?
10 micrometers = 0.01 millimeters.
You are already here. The file tools are free too.
Merge and split PDFs, convert and resize images, cut out a background. Same deal as this page: no account, no watermark, and most of them never upload your file.