# Speed conversion online

**Convert speed units, meters per second, miles per hour, kilometers per hour**

Speed is defined as the rate of change in position, expressed as distance traveled per unit of time. Speed is a scalar quantity with dimensions distance/time. Velocity is a vector quantity, the rate at which an object changes it's position.

In order to calculate speed, the formula is :

- Speed = Distance / Time
- Speed unit in SI system is meters per second (mps).
- Other speed units such as miles per hour (mph), kilometers per hour (kph) are also widely used.

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