Axis

Speed & velocity

speed of lightc

The exact speed of light in vacuum, 299 792 458 m/s.

Dimension
speed
Canonical signature
L*T^-1
System
si
Exactness
Exact

Definition record

How this unit is defined

Canonical base
1 c = 299,792,458 m/s
Conversion type
linear
Aliases
c in vacuum, light speed, lightspeed

Same dimension

Related units

metre per secondsim/skilometre per hoursi acceptedkm/hmile per hourimperial usmphquettametre per secondsiQm/sronnametre per secondsiRm/syottametre per secondsiYm/szettametre per secondsiZm/sexametre per secondsiEm/s

Common conversions

Every conversion routes through the canonical base of the dimension.

1 c = 299,792,458 m/s

Exact relationship

10 c = 2,997,924,580 m/s

Exact relationship