# Speed of light

Speed of light is speed unit, symbol: [c]. Definition of 1 speed of light ≡ 299 792 458 m/s. Light velocity (in vacuum) is one of the basic physical constants. Sign c (Latin celeritas = speed). Its value is exactly: 299792458 m/s. Example: electromagnetic waves propagation speed 1 c.. Compared to metre per second, speed of light is bigger unit.

• 1 [c] = (exactly) 299792458 [m/s]

• 1 [m/s] = (exactly) 1/(299792458) [c] = 3.3356409519815 × 10-9 [c]

## Search destination unit:

### Convert speed of light to other units:

Multiply convert of speed of light to common speed units:

[c]
=? centimetre per second
=? metre per second
=? kilometre per hour
=? inches per second
=? feet per second
=? miles per hour
=? knot