A unit of speed is (any unit of length) divided by (any unit of time). A unit of velocity is any unit of speed, along with a direction.
The unit of velocity is meters per second or m/s.
the SI unit of velocity is m/s
Velocity may be expressed as cms-1 in CGS unit and as ms-1 in SI unit.
The SI unit for velocity (average, starting, final,usual, extraordinary, lowest. highest, but NOT angular) is metres per second.