# Kilometers to Micrometers Conversion

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

**Results in Micrometers:**

## How to Convert Kilometers to Micrometers

To convert a kilometer measurement to a micrometer measurement, multiply the length by the conversion ratio.

Since one kilometer is equal to 1,000,000,000 micrometers, you can use this simple formula to convert:

The length in micrometers is equal to the kilometers multiplied by 1,000,000,000.

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

### How Many Micrometers are in a Kilometer?

There are **1,000,000,000** micrometers in a kilometer, which is why we use this value in the formula above.

1 km = 1,000,000,000 µm

Kilometers and micrometers are both units used to measure length. Keep reading to learn more about each unit of measure.

## Kilometers

One kilometer is equal to 1,000 meters, which are defined as the distance light travels in a vacuum in a ^{1}/_{299,792,458} second time interval.^{[1]}

The kilometer, or kilometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "kilo" is the prefix for 10^{3}. Kilometers can be abbreviated as *km*; for example, 1 kilometer can be written as 1 km.

## Micrometers

One micrometer is equal to one-millionth (1/1,000,000) of a meter, which is defined as the distance light travels in a vacuum in a ^{1}/_{299,792,458} second time interval.

The micrometer, or micrometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "micro" is the prefix for 10^{-6}. A micrometer is sometimes also referred to as a micron. Micrometers can be abbreviated as *µm*; for example, 1 micrometer can be written as 1 µm.

To get an idea of the actual physical length of a micrometer, one human hair is 40-50 µm thick, demonstrating how small this unit of measure is.

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.

Need a ruler? Try our free downloadable and printable rulers, which include both imperial and metric measurements.

## Kilometer to Micrometer Conversion Table

Kilometers | Micrometers |
---|---|

0.000000001 km | 1 µm |

0.000000002 km | 2 µm |

0.000000003 km | 3 µm |

0.000000004 km | 4 µm |

0.000000005 km | 5 µm |

0.000000006 km | 6 µm |

0.000000007 km | 7 µm |

0.000000008 km | 8 µm |

0.000000009 km | 9 µm |

0.0000000001 km | 0.1 µm |

0.000000001 km | 1 µm |

0.00000001 km | 10 µm |

0.0000001 km | 100 µm |

0.000001 km | 1,000 µm |

0.00001 km | 10,000 µm |

0.0001 km | 100,000 µm |

0.001 km | 1,000,000 µm |

0.01 km | 10,000,000 µm |

0.1 km | 100,000,000 µm |

1 km | 1,000,000,000 µm |

## References

- Ambler Thompson and Barry N. Taylor, Guide for the Use of the International System of Units (SI),
*National Institute of Standards and Technology*, https://physics.nist.gov/cuu/pdf/sp811.pdf