Speed of Light to Kilometers per Second
Convert the speed of light in vacuum to kilometers per second for physics, astronomy, relativity, and scientific notation checks.
How to convert speed of light to km/s
To convert a value from speed of light (speed of light) to kilometers per second (km/s), enter the number in the converter above. Use the swap control if you need the reverse direction.
x is the source value in speed of light; y is the result in km/s.
Popular conversions
Quick answers for common speed of light to km/s values are available from the related conversion pages.
Use the related tools section for fixed-value conversions and the reverse direction.
Common conversion table
Quick reference table for common speed of light to km/s values:
| speed of light | km/s |
|---|---|
| 1 | 299,792.458 |
| 5 | 1,498,962.29 |
| 10 | 2,997,924.58 |
| 50 | 14,989,622.9 |
| 100 | 29,979,245.8 |
| 1,000 | 299,792,458 |
About speed of light
Speed of light (speed of light) — The speed of light in vacuum is exactly 299,792,458 meters per second, or 299,792.458 kilometers per second.
Common uses: The speed of light is used in physics, astronomy, relativity, telecommunications, scientific notation, and high-energy calculations.
About kilometers per second
Kilometer per second (km/s) — One kilometer per second equals exactly 1,000 meters per second.
Common uses: Kilometers per second are used for orbital speed, astronomy, spacecraft velocity, physics, and very high-speed comparisons.
Frequently Asked Questions
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