# Convert Kilometers to Millimeters

Enter the length in kilometers below to get the value converted to millimeters.

**Results in Millimeters:**

## How to Convert Kilometers to Millimeters

Convert kilometers to millimeters with this simple formula:

Converting a kilometer length measurement to a millimeter measurement involves multiplying the length by the conversion ratio to find the result. One kilometer is equal to 1,000,000 millimeters, so to convert simply multiply by 1,000,000.

**For example,**here's how to convert 5 kilometers to millimeters using the formula above.

Our inch fraction calculator can add kilometers and millimeters together and it also automatically converts the results to US customary, imperial and SI metric values.

Kilometers and millimeters are both units used to measure length.
Learn more about length and
find more length measurement conversion calculators.
Kilometers are a metric measurement and can be abbreviated as *km*, for example 1 km.
Millimeters are a metric measurement and can be abbreviated as *mm*, for example 1 mm.
Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

Millimeter is spelled *millimetre* internationally,
and it is equal in length to .1 centimeters, 1000 micrometers, or ^{5}/_{127} inch. They are represented by the
smallest ticks on most metric rulers. To get a reference point of the size,
the thickness of a dime is 1.35mm.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs. If you need a ruler you can also download and print our free printable rulers which include both imperial and metric measurements.

## Kilometer Measurements and Equivalent Millimeter Conversions

Kilometers | Millimeters |
---|---|

1 km | 1,000,000 mm |

2 km | 2,000,000 mm |

3 km | 3,000,000 mm |

4 km | 4,000,000 mm |

5 km | 5,000,000 mm |

6 km | 6,000,000 mm |

7 km | 7,000,000 mm |

8 km | 8,000,000 mm |

9 km | 9,000,000 mm |

10 km | 10,000,000 mm |

11 km | 11,000,000 mm |

12 km | 12,000,000 mm |

13 km | 13,000,000 mm |

14 km | 14,000,000 mm |

15 km | 15,000,000 mm |

16 km | 16,000,000 mm |

17 km | 17,000,000 mm |

18 km | 18,000,000 mm |

19 km | 19,000,000 mm |

20 km | 20,000,000 mm |

21 km | 21,000,000 mm |

22 km | 22,000,000 mm |

23 km | 23,000,000 mm |

24 km | 24,000,000 mm |

25 km | 25,000,000 mm |

26 km | 26,000,000 mm |

27 km | 27,000,000 mm |

28 km | 28,000,000 mm |

29 km | 29,000,000 mm |

30 km | 30,000,000 mm |

31 km | 31,000,000 mm |

32 km | 32,000,000 mm |

33 km | 33,000,000 mm |

34 km | 34,000,000 mm |

35 km | 35,000,000 mm |

36 km | 36,000,000 mm |

37 km | 37,000,000 mm |

38 km | 38,000,000 mm |

39 km | 39,000,000 mm |

40 km | 40,000,000 mm |

## More Kilometer Length Conversions

**US Customary & Imperial Units**

- Convert to Miles
- 1 km is equal to 0.621371 miles
- Convert to Yards
- 1 km is equal to 1,093.61 yards
- Convert to Feet
- 1 km is equal to 3,280.84 feet
- Convert to Inches
- 1 km is equal to 39,370.1 inches

**SI Units**

- Convert to Meters
- 1 km is equal to 1,000 meters
- Convert to Centimeters
- 1 km is equal to 100,000 centimeters
- Convert to Micrometers
- 1 km is equal to 1,000,000,000 micrometers
- Convert to Nanometers
- 1 km is equal to 1,000,000,000,000 nanometers