There are many different formulas which are useful when determining movement. The following equations are the most used when examining movement.
Determining Velocity (as a constant)
v = s / t
"V" is velocity, "S" being linear displacement, and "T" being time.
"S" is determined through measuring meters or feet per second.
"T" is determined through measuring seconds.
Determining Velocity (as an acceleration)
v = v0 + a t
v0 is initial linear veolcity (meters per second or feet per second).
"a" is acceleration (meters/feet per second squared).
Therefore, depending upon if you are calculating velocity as a constant or as seen in acceleration, you now have the formula needed to define each.