### What is a Kilometer?

The **Kilometre **(SI symbol: km) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for 1000).

A kilometer is a metric system unit mainly used to express distance in most of the world; notable exceptions are the United States and the United Kingdom, where the mile is the unit used. Even though kilometers and miles are used for measuring the same unit (distance), the value differs.

### 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 Kilometer to Millimeters?

To convert Kilometer to Millimeters, simply multiply the Kilometer value by 1000000.

The formula used to calculate Kilometer to Millimeters -

**d**_{(km)} = **d**_{(mm)} * 1000000

The distance *d* in Millimeters (mm) is equal to the distance *d* in Kilometers (km) multiplied by 1000000.

### How many Millimeters in a Kilometer

In simple terms, 1 km is equal to 1000000 mm.

The formula used is 1*1000000 = 1000000(mm)

### How many Kilometers in a Millimeter

1 Millimeter is equal to 1e-06 Kilometers. So we can also say that there are 1e-06 Kilometers in a Millimeter.

### Kilometer to Millimeters Conversion Table

Kilometer (km) | Millimeter (mm) |
---|---|

0.01 (km) | |

0.02 (km) | |

0.03 (km) | |

0.04 (km) | |

0.05 (km) | |

1 (km) | |

2 (km) | |

3 (km) | |

4 (km) | |

5 (km) | |

6 (km) | |

7 (km) | |

8 (km) | |

9 (km) | |

10 (km) | |

20 (km) | |

30 (km) | |

40 (km) | |

50 (km) | |

60 (km) | |

70 (km) | |

80 (km) | |

90 (km) | |

100 (km) | |

200 (km) | |

300 (km) | |

400 (km) | |

500 (km) | |

600 (km) | |

700 (km) | |

800 (km) | |

900 (km) | |

1000 (km) | |

5000 (km) | |

10000 (km) |