Millimeters to Micrometers (mm to µm)
Free online millimeter to micrometer 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 millimeter value by 1,000 — i.e. µm = mm × 1,000
Quick check: 1 mm = 1,000 µm
Quick check: 1 mm = 1,000 µm
Millimeters to Micrometers conversion table
| Millimeters (mm) | Micrometers (µm) |
|---|---|
| 1 mm | 1,000 µm |
| 2 mm | 2,000 µm |
| 3 mm | 3,000 µm |
| 4 mm | 4,000 µm |
| 5 mm | 5,000 µm |
| 6 mm | 6,000 µm |
| 7 mm | 7,000 µm |
| 8 mm | 8,000 µm |
| 9 mm | 9,000 µm |
| 10 mm | 10,000 µm |
| 15 mm | 15,000 µm |
| 20 mm | 20,000 µm |
| 25 mm | 25,000 µm |
| 30 mm | 30,000 µm |
| 40 mm | 40,000 µm |
| 50 mm | 50,000 µm |
| 75 mm | 75,000 µm |
| 100 mm | 100,000 µm |
| 250 mm | 250,000 µm |
| 500 mm | 500,000 µm |
| 1,000 mm | 1,000,000 µm |
How to convert millimeters to micrometers
To convert millimeters to micrometers, multiply the amount in millimeters by 1,000. For example, 10 mm = 10,000 µm. 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 micrometers are in one millimeter?
One millimeter is exactly 1,000 micrometers.
How do I convert mm to µm?
Multiply the mm value by 1,000 to get µm. The converter at the top of this page does this automatically and works in both directions.
How much is 100 millimeters in micrometers?
100 millimeters equals 100,000 micrometers.