Speed of Light Converter

299,792,458 m/s
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Understanding the Speed of Light

What is the Speed of Light?

The speed of light (c) is a universal physical constant crucial to modern physics. It equals exactly 299,792,458 meters per second in a vacuum, making it the fastest possible speed in our universe.

Key Facts

  • Light travels at approximately 670,616,629 miles per hour
  • It takes about 8 minutes and 20 seconds for light to travel from the Sun to Earth
  • The speed of light is the same in all reference frames