### 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.

### 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.

### How to Convert Millimeter to Micrometers?

To convert Millimeter to Micrometers, simply multiply the Millimeter value by 1000.

The formula used to calculate Millimeter to Micrometers -

**d**_{(mm)} = **d**_{(μm)} * 1000

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

### How many Micrometers in a Millimeter

In simple terms, 1 mm is equal to 1000 μm.

The formula used is 1*1000 = 1000(μm)

### How many Millimeters in a Micrometer

1 Micrometer is equal to 0.001 Millimeters. So we can also say that there are 0.001 Millimeters in a Micrometer.

### Millimeter to Micrometers Conversion Table

Millimeter (mm) | Micrometer (μm) |
---|---|

0.01 (mm) | |

0.02 (mm) | |

0.03 (mm) | |

0.04 (mm) | |

0.05 (mm) | |

1 (mm) | |

2 (mm) | |

3 (mm) | |

4 (mm) | |

5 (mm) | |

6 (mm) | |

7 (mm) | |

8 (mm) | |

9 (mm) | |

10 (mm) | |

20 (mm) | |

30 (mm) | |

40 (mm) | |

50 (mm) | |

60 (mm) | |

70 (mm) | |

80 (mm) | |

90 (mm) | |

100 (mm) | |

200 (mm) | |

300 (mm) | |

400 (mm) | |

500 (mm) | |

600 (mm) | |

700 (mm) | |

800 (mm) | |

900 (mm) | |

1000 (mm) | |

5000 (mm) | |

10000 (mm) |