- Speed
- 50 km/h
How it works
Equal distances need weighted averaging
Traveling 60 km at 60 km/h and another 60 km at 30 km/h gives 40 km/h overall, not 45. Enter the combined 120 km and three hours because the slower leg occupies more time.
Relating speed, distance, and elapsed time
Average speed divides a traveled distance by the corresponding elapsed time. Use the same journey interval for both inputs, and decide whether stops are included in that elapsed time. The missing-quantity modes rearrange the same relationship. An average does not describe moment-by-moment speed or guarantee that a trip with changing traffic will take the projected duration.
Calculate: formula and assumptions
Speed = distance/time.
Use the units printed beside each input. Mass and gravitational weight are different physical quantities.
Speed, distance & elapsed time: formula and assumptions
Speed = distance / time.
Normalize distance to meters and elapsed time to seconds. Hours may exceed 23 in duration input; clock-time and time-zone rules do not apply.
Worked example
Using the Calculate example:
- Solve for
- speed
- Distance (km)
- 100
- Time (hours)
- 2
Speed = distance/time.
Example result
Speed: 50 km/h
These are illustrative inputs. Change the values to explore a different scenario.
Formula references
References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.
Common questions
Is average speed the same as speed at every instant?
No. Distance divided by total time gives an average. The calculation does not describe acceleration, stops or moment-to-moment speed changes.
Can the elapsed duration exceed one day?
Yes. Duration hours can exceed 23. The input is elapsed time, not a clock time or timezone-aware timestamp.
Prepared by Finflo. See our methodology and editorial policy.