Speed Distance Time Calculator — Solve for the Missing Value
CalculatorA speed distance time calculator solves the relation v = d ÷ t for whichever of the three values is unknown.
What is it
Speed, distance, and time are linked by one formula: speed is distance ÷ time, distance is speed × time, and time is distance ÷ speed. Pick which value to solve for and enter the other two. This tool uses km and hours by default, and the speed it returns is an average speed, which can differ from instantaneous speed.
speed = distance ÷ time; distance = speed × time; time = distance ÷ speed
How to use
- 1Choose which value to solve for (speed, distance, or time).
- 2Enter the other two values.
- 3Press calculate and check the result and formula detail.
Reference
| Distance (km) | Time (h) | Speed (km/h) |
|---|---|---|
| 100 | 1.25 | 80 |
| 150 | 2.5 | 60 |
| 300 | 3 | 100 |
Sources & standards
FAQ
What is the average speed for 100km in 1 hour 15 minutes?
1 hour 15 minutes is 1.25 hours, so the average speed is 100 ÷ 1.25 = 80 km/h.
How do I enter minutes?
Enter time as decimal hours: 30 minutes is 0.5 and 1 hour 15 minutes is 1.25. Time results are also shown as hours and minutes.
Is speed distance time input sent to a server?
No. This tool runs in your browser and does not send input to a server.