Overview
Speed tells you how fast; velocity tells you how fast and in which direction. Average velocity uses displacement over time, not path length.
Displacement vs distance
Average velocity uses displacement (with direction). Average speed uses path length.
Signs matter
Negative velocity means motion opposite your chosen positive direction.
Instantaneous vs average
This calculator reports average velocity over an interval, not a speedometer reading.
Try the calculator
Use the free Velocity Calculator for live numbers, then come back to this guide anytime you need a quick refresher.