How much faster is the speed of light, than the speed of sound?

The speed of light is much faster than the speed of sound. Sound moves at 343 metres per second (thats about 770 miles per hour!) The speed of light is a little trickier. In a vacuum it is roughly 300 000 000 meters per second (so nearly 900 000 times faster than sound!

The speed of light = 299 792 458 m / s

speed of sound at sea level = 340.29 m / s

299 792 458 / 340.29 = 880991.089953

or about 880991 times faster