# Convert Micrometers (μm) to Millimeters (mm)

Please provide the values below to convert from Micrometer (μm) to Millimeters (mm) and vice versa.

### What is a Micrometer?

The Micrometre (SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length equalling 1×10−6 meter (SI standard prefix "micro-" = 10−6); that is, one-millionth of a meter (or one-thousandth of a millimeter, 0.001 mm, or about 0.00004 inches).

A micrometer is a standard unit of measurement used to measure wavelengths of infrared radiations, sizes of biological cells and bacteria, and for grading wool by the diameter of the fibers.

The width of a single human hair ranges from approximately 20 to 200 μm. The longest human chromosome, chromosome 1, is approximately 10 μm in length.

### What is a Millimeter?

The Millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one-thousandth of a meter, which is the SI base unit of length. Therefore, there are one thousand millimeters in a meter and ten millimeters in a centimeter.

### How to Convert Micrometer to Millimeters?

To convert Micrometer to Millimeters, simply divide the Micrometer value by 1000.

The formula used to calculate Micrometer to Millimeters -

d(μm) = d(mm) / 1000

The distance d in Millimeters (mm) is equal to the distance d in Micrometers (μm) divided by 1000.

### How many Millimeters in a Micrometer

In simple terms, 1 μm is equal to 0.001 mm.

The formula used is 1/1000 = 0.001(mm)

### How many Micrometers in a Millimeter

1 Millimeter is equal to 1000 Micrometers. So we can also say that there are 1000 Micrometers in a Millimeter.

### Micrometer to Millimeters Conversion Table

Micrometer (μm)Millimeter (mm)
0.01 (μm)
0.02 (μm)
0.03 (μm)
0.04 (μm)
0.05 (μm)
1 (μm)
2 (μm)
3 (μm)
4 (μm)
5 (μm)
6 (μm)
7 (μm)
8 (μm)
9 (μm)
10 (μm)
20 (μm)
30 (μm)
40 (μm)
50 (μm)
60 (μm)
70 (μm)
80 (μm)
90 (μm)
100 (μm)
200 (μm)
300 (μm)
400 (μm)
500 (μm)
600 (μm)
700 (μm)
800 (μm)
900 (μm)
1000 (μm)
5000 (μm)
10000 (μm)