en.wikipedia.org/wiki/Speed_of_light

The speed of light in vacuum, commonly denoted c, is a universal physical
constant important ... miles per hour, 671 million (7008671000000000000♤6.71×
10<sup>8</sup>) ... As a...

www.universetoday.com/38040/speed-of-light-2/

Sep 1, 2016 ... Light travels at a constant speed of 1,079,252,848.8 (1.07 billion) km per hour.
That works out to 299,792,458 m/s, or about 670,616,629 mph ...

www.grc.nasa.gov/www/k-12/Numbers/Math/Mathematical_Thinking/how_fast_is_the_speed.htm

Light travels at a constant, finite speed of 186,000 mi/sec. ... jet aircraft, moving at
a ground speed of 500 mph, would cross the continental U.S. once in 4 hours.

www.unitjuggler.com/convert-speed-from-c-to-mph.html

Convert speed units. Easily convert speed of light to miles per hour, convert c to
mph . Many other converters available for free.

chemistry.about.com/od/unitconversions/a/What-Is-The-Speed-Of-Light-In-Miles-Per-Hour.htm

This unit conversion example problem demonstrates how to convert the speed of
light in meters per second to miles per hour.

www.foxnews.com/tech/2012/03/30/speed-light-scientist-resigns-over-mistake.html

Mar 30, 2012 ... Einstein theorized that the speed of light in a vacuum -- approximately 186,280
miles per second, or about 700 million miles per hour -- is an ...

www.space.com/15830-light-speed.html

May 22, 2012 ... In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could
travel at the speed of light, you could go around the Earth 7.5 ...

www.tech-faq.com/what-is-speed-of-light-in-mph.html

Mar 11, 2016 ... The speed of light in MPH is 670616629 mph, 299792458 meters per second, or
186, 282 miles per second. Light takes approximately one ...

www.reference.com/science/speed-light-miles-per-hour-1cb2f20d382866dc

The speed of light in a vacuum is measured at 186282 miles per second, which is
670616629 miles per hour. The speed of light is denoted mathematically by ...

www.kylesconverter.com/speed-or-velocity/light-speed-to-miles-per-hour

Instantly Convert Light Speed (c) to Miles Per Hour (mph) and Many More Speed
Or Velocity Conversions Online. Light Speed Conversion Charts. Many Other ...