Kilometers to Micrometers Conversion (km to µm)

Kilometers to Micrometers Converter

Enter the length in kilometers below to convert it to micrometers.

Result in Micrometers:

1 km = 1,000,000,000 µm

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

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

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.

Learn more about kilometers.

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.

Learn more about micrometers.

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

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

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