**Velocity is a vector quantity measured in units of length per time.** Using the United States customary unit of measurement, velocity is typically given in miles per hour, commonly abbreviated to "mph."

An object's velocity refers to its speed and direction of motion. It can be expressed using the formula V = Δx / Δt, where "V" indicates the velocity, "Δx" denotes the change in distance and "Δt" signifies the change in time.

Aside from mph, velocity can likewise be represented in terms of other units. This quantity can also be measured in feet per minute, feet per second or inches per second. The standard unit for velocity in the metric system is meters per second.