Velocity Calculator
Calculate velocity from distance and time or from initial velocity and acceleration.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Velocity Calculator
This calculator finds velocity using two standard kinematic formulas.
- Choose your mode. Use distance/time if you know how far an object traveled and how long it took. Use the acceleration mode if you know the initial velocity and constant acceleration.
- Enter values. Fill in the required fields for your chosen mode.
- Read the result. Velocity appears instantly in meters per second.
About Velocity
Velocity is a vector quantity that describes both the speed and direction of an object's motion. Unlike speed (which is scalar), velocity can be negative, indicating motion in the opposite direction. The SI unit is meters per second (m/s). Average velocity equals total displacement divided by total time. Instantaneous velocity is the velocity at a specific moment. In uniform acceleration, the kinematic equation v = u + at relates final velocity to initial velocity, acceleration, and time.
Frequently Asked Questions
What is the difference between speed and velocity?
Speed is a scalar quantity that measures how fast something moves. Velocity is a vector that includes both speed and direction. A car traveling at 60 km/h north has a velocity. 60 km/h alone is its speed.
How do I convert m/s to km/h?
Multiply meters per second by 3.6 to get kilometers per hour. For example, 10 m/s equals 36 km/h.
Can velocity be negative?
Yes. Negative velocity means the object is moving in the direction defined as negative in your coordinate system. It does not mean the object is slowing down.