# Kilometers to Micrometers Converter

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

## Result in Micrometers:

1 km = 1,000,000,000 µm

Do you want to convert micrometers to kilometers?

## How to Convert Kilometers to Micrometers

To convert a measurement in kilometers to a measurement in micrometers, multiply the length by the following conversion ratio: 1,000,000,000 micrometers/kilometer.

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

micrometers = kilometers × 1,000,000,000

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

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

### 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

## What Is a Kilometer?

One kilometer is equal to 1,000 meters, which are defined as the distance light travels in a vacuum in 1/299,792,458 of a second.[1] One kilometer is equal to 0.621371 miles.

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

## What Is a Micrometer?

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 millionths, or 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.

## Kilometer to Micrometer Conversion Table

Table showing various kilometer measurements converted to micrometers.
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

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