# Micrometers to Kilometers Conversion

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

Results in Kilometers: 1 µm = 1.0E-9 km
Hint: use a scientific notation calculator to convert E notation to decimal

## How to Convert Micrometers to Kilometers To convert a micrometer measurement to a kilometer measurement, divide the length by the conversion ratio. One kilometer is equal to 1,000,000,000 micrometers, so use this simple formula to convert:

kilometers = micrometers ÷ 1,000,000,000

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

For example, here's how to convert 5,000,000,000 micrometers to kilometers using the formula above.
5,000,000,000 µm = (5,000,000,000 ÷ 1,000,000,000) = 5 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.

## 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.

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 103. Kilometers can be abbreviated as km; for example, 1 kilometer can be written as 1 km.

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.

## Micrometer to Kilometer Conversion Table

Micrometer measurements converted to kilometers
Micrometers Kilometers
1 µm 0.000000001 km
2 µm 0.000000002 km
3 µm 0.000000003 km
4 µm 0.000000004 km
5 µm 0.000000005 km
6 µm 0.000000006 km
7 µm 0.000000007 km
8 µm 0.000000008 km
9 µm 0.000000009 km
10 µm 0.00000001 km
100 µm 0.0000001 km
1,000 µm 0.000001 km
10,000 µm 0.00001 km
100,000 µm 0.0001 km
1,000,000 µm 0.001 km
10,000,000 µm 0.01 km
100,000,000 µm 0.1 km
1,000,000,000 µm 1 km

## References

1. 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