Speed of Light to Miles per Hour Converter

Convert the speed of light (c) to miles per hour (MPH) with our free calculator

670,616,629.38 MPH
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About Speed of Light Conversion

The speed of light (c) is one of the fundamental constants of nature, traveling at exactly 299,792,458 meters per second in a vacuum. This equals approximately 670,616,629.38 miles per hour.

Key Facts

  • Nothing can travel faster than the speed of light in a vacuum
  • Light takes about 1.3 seconds to travel from the Moon to Earth
  • It takes approximately 8 minutes and 20 seconds for light to travel from the Sun to Earth

Conversion Formula

To convert from speed of light (c) to miles per hour (MPH), use this formula:

MPH = c × 670,616,629.3844