Convert Kilometers to Micrometers

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

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1 km = 1,000,000,000 µm

How to Convert Kilometers to Micrometers

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

To convert a kilometer measurement to a micrometer measurement, multiply the length by the conversion ratio. One kilometer is equal to 1,000,000,000 micrometers, so use this simple formula to convert:

micrometers = kilometers × 1,000,000,000

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.
5 km = (5 × 1,000,000,000) = 5,000,000,000 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.

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.

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.

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 Micrometer Conversions

Common kilometer values converted to the equivalent micrometer value
Kilometers Micrometers
1 km 1,000,000,000 µm
2 km 2,000,000,000 µm
3 km 3,000,000,000 µm
4 km 4,000,000,000 µm
5 km 5,000,000,000 µm
6 km 6,000,000,000 µm
7 km 7,000,000,000 µm
8 km 8,000,000,000 µm
9 km 9,000,000,000 µm
10 km 10,000,000,000 µm
11 km 11,000,000,000 µm
12 km 12,000,000,000 µm
13 km 13,000,000,000 µm
14 km 14,000,000,000 µm
15 km 15,000,000,000 µm
16 km 16,000,000,000 µm
17 km 17,000,000,000 µm
18 km 18,000,000,000 µm
19 km 19,000,000,000 µm
20 km 20,000,000,000 µm
21 km 21,000,000,000 µm
22 km 22,000,000,000 µm
23 km 23,000,000,000 µm
24 km 24,000,000,000 µm
25 km 25,000,000,000 µm
26 km 26,000,000,000 µm
27 km 27,000,000,000 µm
28 km 28,000,000,000 µm
29 km 29,000,000,000 µm
30 km 30,000,000,000 µm
31 km 31,000,000,000 µm
32 km 32,000,000,000 µm
33 km 33,000,000,000 µm
34 km 34,000,000,000 µm
35 km 35,000,000,000 µm
36 km 36,000,000,000 µm
37 km 37,000,000,000 µm
38 km 38,000,000,000 µm
39 km 39,000,000,000 µm
40 km 40,000,000,000 µm

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 Millimeters
1 km is equal to 1,000,000 millimeters
Convert to Nanometers
1 km is equal to 1,000,000,000,000 nanometers