Average Speed from Distance and Time Calculator
Enter a distance and the time it took to travel it to calculate average speed in m/s, km/h and mph.
Average Speed from Distance and Time Calculator
Calculates average speed from a distance traveled and the time taken, shown in multiple common speed units.
This calculator divides distance by time to find average speed, then converts the result into three of the most commonly used speed units — meters per second, kilometers per hour, and miles per hour — so you don't have to do the unit conversion yourself. It's a fundamental kinematics calculation useful for physics problems, checking travel time estimates, or converting a known average speed between metric and imperial units.
Example
- With the default values shown above, this calculator returns: Average Speed ≈ 18.52 m/s; Average Speed ≈ 66.67 km/h; Average Speed ≈ 41.42 mph.
Frequently Asked Questions
What is the formula for average speed?
Average speed equals total distance divided by total time (v = d/t) — this calculator computes it once in base SI units (m/s) and then converts to km/h and mph for convenience.
Does this give instantaneous speed?
No — this gives the average speed over the whole distance and time entered; actual instantaneous speed may have varied throughout the trip (faster at times, slower at others).
Sources
- Standard formula, publicly documented method