Velocity Calculator
v = Δx / Δt • Average velocity from distance or displacement and time
Use displacement for signed velocity. Negative displacement is allowed.
Time must be greater than 0.
Quick summary
Enter distance or displacement and time, then click Calculate.
Results
Velocity
— m/s
Velocity
— km/h
Velocity
— mph
Velocity
— ft/s
Results are calculated from SI units after converting your selected distance and time units.
Use this Velocity Calculator to calculate average velocity or average speed from displacement or distance and elapsed time.
Calculation Method
For average velocity:
Average velocity = displacement ÷ elapsed time
v = Δx ÷ Δt
For average speed:
Average speed = total distance ÷ elapsed time
Example
If an object travels 150 meters in 12 seconds:
Speed = 150 ÷ 12 = 12.5 m/s
This is equivalent to:
12.5 × 3.6 = 45 km/h
Important Note
Distance and displacement are not the same. Distance is total path length, while displacement is the change in position from start to finish and can include direction.
The calculator gives an average over the entered time interval. It does not calculate instantaneous velocity or acceleration.