Speed of Light to Kilometers per Second Converter

Enter the speed in speed of light below to get the value converted to kilometers per second.

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1 c = 299,792.458 km/s

Do you want to convert kilometers per second to speed of light?


How to Convert Speed of Light to Kilometers per Second

To convert a measurement in speed of light to a measurement in kilometers per second, multiply the speed by the following conversion ratio: 299,792.458 kilometers per second/speed of light.

Since one speed of light is equal to 299,792.458 kilometers per second, you can use this simple formula to convert:

kilometers per second = speed of light × 299,792.458

The speed in kilometers per second is equal to the speed in speed of light multiplied by 299,792.458.

For example, here's how to convert 5 speed of light to kilometers per second using the formula above.
kilometers per second = (5 c × 299,792.458) = 1,498,962.29 km/s

Speed of light and kilometers per second are both units used to measure speed. Keep reading to learn more about each unit of measure.

What Is the Speed of Light?

The speed of light is equal to exactly 299,792,458 meters per second, or 670,616,629 miles per hour. The definition of the speed of light is actually derived from the most recent 1983 international definition of the meter.[1]

Speed of light can be abbreviated as c; for example, 1 speed of light can be written as 1 c.

Learn more about the speed of light.

What Are Kilometers per Second?

Kilometers per second are a measurement of speed expressing the distance traveled in kilometers in one second.

The kilometer per second, or kilometre per second, is an SI unit of speed in the metric system. Kilometers per second can be abbreviated as km/s, and are also sometimes abbreviated as km/sec. For example, 1 kilometer per second can be written as 1 km/s or 1 km/sec.

In the expressions of units, the slash, or solidus (/), is used to express a change in one or more units relative to a change in one or more other units.[2] For example, km/s is expressing a change in length or distance relative to a change in time.

Kilometers per second can be expressed using the formula:
vkm/s = dkm / tsec

The velocity in kilometers per second is equal to the distance in kilometers divided by time in seconds.

Learn more about kilometers per second.

Speed of Light to Kilometer per Second Conversion Table

Table showing various speed of light measurements converted to kilometers per second.
Speed Of Light Kilometers Per Second
0.00001 c 2.9979 km/s
0.00002 c 5.9958 km/s
0.00003 c 8.9938 km/s
0.00004 c 11.99 km/s
0.00005 c 14.99 km/s
0.00006 c 17.99 km/s
0.00007 c 20.99 km/s
0.00008 c 23.98 km/s
0.00009 c 26.98 km/s
0.000001 c 0.299792 km/s
0.00001 c 2.9979 km/s
0.0001 c 29.98 km/s
0.001 c 299.79 km/s
0.01 c 2,998 km/s
0.1 c 29,979 km/s
1 c 299,792 km/s

References

  1. National Institute of Standards and Technology, SI Redefinition: Meter, https://www.nist.gov/si-redefinition/meter
  2. National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using

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