Convert Kilometers to Nanometers

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

Results in Nanometers:
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1 km = 1,000,000,000,000 nm

How to Convert Kilometers to Nanometers

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 nanometer measurement, multiply the length by the conversion ratio. One kilometer is equal to 1,000,000,000,000 nanometers, so use this simple formula to convert:

nanometers = kilometers × 1,000,000,000,000

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

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

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


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.


One nanometer is equal to one-billionth (1/1,000,000,000) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The nanometer, or nanometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "nano" is the prefix for 10-9. Nanometers can be abbreviated as nm, for example 1 nanometer can be written as 1 nm.

The nanometer is an extremely small unit of length measurement, often used to measure things that are very small, such as the transistors and electrical pathways in computer processors and nanotechnology.

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 Nanometer Conversions

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

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 Micrometers
1 km is equal to 1,000,000,000 micrometers