How many millimeters are there in a micrometer? Use this online tool to quickly convert from micrometers to millimeters (μm to mm) and vice versa.
How Many Millimeters in a Micrometer?
There are precisely 0.001 millimeters in one micrometer. In scientific notation, this is expressed as 1×10-3.
For any given number of micrometers, you can find the mathematically equivalent length or distance in millimeters by simply multiplying the number of micrometers by the conversion factor.
By dividing the given number of millimeters by the conversion factor, you can also precisely convert from millimeters to micrometers.
Difference Between Micrometers and Millimeters
The primary distinctions between micrometers and millimeters are the units of length they represent, the variety of applications and functions they can serve, and their conversion factors.
| Characteristics | Micrometers (μm) | Millimeters (mm) |
|---|---|---|
| Unit of Length | The second-smallest unit of length in the metric system is the micrometer, sometimes called the micron. Most humans cannot see objects smaller than 40 micrometers without the aid of scientific instruments like a microscope. | The millimeter is the smallest unit of length found on a metric ruler, measuring tape, and metric stick. It is often confused with mil, which is actually a thousandth of an inch, in the United States. |
| Uses and Applications | Used to measure infrared light wavelengths and the size of microorganisms such as cells and bacteria | Used to measure very small objects and lengths that are still visible to the unaided eye |
| Conversion Factor | 1 micrometer is equal to 0.001 millimeters | 1 millimeter is equal to 1000 micrometers |
Similarity Between Micrometers and Millimeters
Both centimeters and micrometers are part of the International System of Units (SI), commonly referred to as the metric system. The metric system of measurement has essentially replaced the imperial system worldwide.
In this system, the meter serves as the standard unit of length. Prefixes are added to signify decimal-based multipliers and to denote longer or larger distances and shorter or smaller objects. In this case, “micro-” refers to one-millionth of a meter while “milli-” refers to one-thousandth.
How to Convert Micrometers to Millimeters?
The conversion factor, 1 micrometer = 0.001 millimeters, can be used to accurately convert these measurements of length into each other’s mathematical equivalents. Refer to the step-by-step procedure below for the exact process:
Formula:
Millimeters = Micrometers × 0.001
Task:
Convert 549 micrometers to millimeters
Calculation:
Number of Millimeters = 549 × 0.001 = 0.549 mm
Therefore, 549 micrometers is approximately equivalent to 0.549 millimeters.
Micrometers to Millimeters (μm to mm) Conversion Table
Use the table below to convert micrometers to millimeters for the ranges of 1 to 10, 10 to 100 for every multiple of 10, and 100 to 1,000 for every multiple of 100:
| Micrometers (μm) | Millimeters (mm) |
|---|---|
| 1 | 0.0001 |
| 2 | 0.0002 |
| 3 | 0.0003 |
| 4 | 0.0004 |
| 5 | 0.0005 |
| 6 | 0.0006 |
| 7 | 0.0007 |
| 8 | 0.0008 |
| 9 | 0.0009 |
| 10 | 0.001 |
| 20 | 0.002 |
| 30 | 0.003 |
| 40 | 0.004 |
| 50 | 0.005 |
| 60 | 0.006 |
| 70 | 0.007 |
| 80 | 0.008 |
| 90 | 0.009 |
| 100 | 0.01 |
| 200 | 0.02 |
| 300 | 0.03 |
| 400 | 0.04 |
| 500 | 0.05 |
| 600 | 0.06 |
| 700 | 0.07 |
| 800 | 0.08 |
| 900 | 0.09 |
| 1000 | 0.1 |
References
https://gacc.nifc.gov/nrcc/dispatch/equipment_supplies/agree-contract/forms/MicronMesh.pdf