Average Speed Calculator
Calculate average speed from distance and journey time, or reverse the calculation to estimate travel time or distance. Useful for road trips, commutes, cycling, running, delivery planning and vehicle performance checks.
Calculator
Choose what you want to calculate, then enter the two values you already know.
Total distance covered from start to finish.
Include stops if you want door-to-door average speed.
The journey or route distance.
Expected average speed across the full journey.
Average speed over the period.
The amount of time spent travelling.
Optional adjustments
Used to compare moving speed vs door-to-door speed.
Optional, used to estimate arrival time.
Optional, shows the required average speed.
Optional comparison only, not a legal judgement.
Speed view
Enter distance and time to calculate your average speed.
Results
Shows how the result is built from distance, moving time and optional stops.
How the calculation works
Average speed is the total distance travelled divided by the total time taken. For a real journey, the answer depends on whether you include traffic, stops, charging, refuelling, rest breaks and waiting time.
Journey time = distance ÷ average speed
Distance = average speed × time
The calculator converts everything into a common internal unit first, then displays the result in mph, km/h, m/s and pace. If you add breaks, it separates moving speed from door-to-door average speed so the result is more useful for planning.
Note: This is a maths and planning tool. It does not account for live traffic, roadworks, legal speed limits, weather, route gradients or safety conditions. Always follow the road rules and drive, ride or run at a safe speed.
Useful examples
Road journey
A 120 mile trip in 2 hours 15 minutes has an average speed of about 53.3 mph.
Cycling
A 40 km ride in 2 hours gives an average speed of 20 km/h.
Running pace
A speed of 10 km/h is equivalent to a pace of 6:00 min/km.
Door-to-door average
Including a 20 minute stop lowers the overall average, even if your moving speed stays the same.
Tips for accurate results
- •Use total journey time for planning. Include traffic, stops and waiting time if you want a realistic arrival estimate.
- •Use moving time for performance. For cycling, running or vehicle testing, moving time gives a cleaner performance average.
- •Check the unit system. Mixing miles with km/h can produce confusing results, so choose the distance and speed units before comparing values.
- •Do not plan to exceed legal limits. If the required speed to arrive on time is too high, leave earlier or choose a safer route.