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Earth Sciences
Speed of Light

How fast is the speed of light in mph?

Answer

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Wiki User
April 27, 2010 7:25AM

1mile = 1.609 km

Speed of light in kms-1 = 300000 kms-1

Speed of light in miles per sec = 300000/1.609 ms-1

= 186451.21 mps

In mph, speed of light = 671224362.958 mph