Micrometers to Millimeters (µm to mm)
Free online micrometer to millimeter converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
LENGTH CONVERTER — INSTANT RESULT
Formula: multiply the micrometer value by 0.001 — i.e. mm = µm × 0.001
Quick check: 1 µm = 0.001 mm
Quick check: 1 µm = 0.001 mm
Micrometers to Millimeters conversion table
| Micrometers (µm) | Millimeters (mm) |
|---|---|
| 1 µm | 0.001 mm |
| 2 µm | 0.002 mm |
| 3 µm | 0.003 mm |
| 4 µm | 0.004 mm |
| 5 µm | 0.005 mm |
| 6 µm | 0.006 mm |
| 7 µm | 0.007 mm |
| 8 µm | 0.008 mm |
| 9 µm | 0.009 mm |
| 10 µm | 0.01 mm |
| 15 µm | 0.015 mm |
| 20 µm | 0.02 mm |
| 25 µm | 0.025 mm |
| 30 µm | 0.03 mm |
| 40 µm | 0.04 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 |
How to convert micrometers to millimeters
To convert micrometers to millimeters, multiply the amount in micrometers by 0.001. For example, 10 µm = 0.01 mm. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric and imperial/US customary length units, plus nautical, astronomical and survey units. The meter is the SI base unit of length; all factors below are exact definitions where a legal definition exists.
Frequently asked questions
How many millimeters are in one micrometer?
One micrometer is exactly 0.001 millimeters.
How do I convert µm to mm?
Multiply the µm value by 0.001 to get mm. The converter at the top of this page does this automatically and works in both directions.
How much is 100 micrometers in millimeters?
100 micrometers equals 0.1 millimeters.