# 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

## Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

## Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

### Here is a list of some of the common metric prefixes:

- “kilo” – 1,000x larger
- “hecto” – 100x larger
- “deca” – 10x larger
- “deci” – 10x smaller
- “centi” – 100x smaller
- “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”

The u in Until refers to the base unit.