SI Unit of Speed is Metre per Second (m/s or ms-1)
The SI unit of speed is metres per second abbreviated as m/s or ms-1, which is a scalar quantity that represents the rate at which an object moves.
The formula for speed is ν = d/t, where ν stands for speed, d means distance and t implies time. For example, if an object travels 1 metre in 1 second, then its speed is 1 metre per second.
Other units of speed include:
Kilometres per hour (km/h or kmph)
Miles per hour (mph or mi/hr)
Knots (nautical miles per hour, symbol kn or kt)
Note: Meter and Metre are same thing.
In everyday life, kilometres per hour or miles per hour are used as the unit of speed.