Speed, Distance & Time
Given any two of speed, time and distance, calculate the third.
Examples (click to try)
How to Use the Speed, Distance & Time Calculator
Fill in two of speed, time and distance, then press Calculate to find the missing one. Clicking an example chip fills the values and calculates automatically. Tick "Show mph" to read speed in mph and distance in miles.
Worked examples
- 120 km at 60 km/h → time 2.00 h (distance ÷ speed)
- 10 km in 1 h → speed 10.0 km/h (distance ÷ time)
- 80 km/h × 2.5 h → distance 200.0 km (speed × time)
- 20 km on foot at 4 km/h → time 5.00 h (walking / hiking estimate)
- Time set to 0 while solving for speed → shows "Values must be greater than zero." (no Infinity)
Common Uses
- Estimating travel time from distance and average speed.
- Checking average speed after a drive, ride, walk or delivery route.
- Finding distance covered when you know speed and elapsed time.
FAQ
Is my data sent to a server?
No. Everything runs in your browser; nothing is transmitted or stored externally.
Which of the three can it solve?
Enter any two of speed, time and distance and the missing one is computed. A blank speed gives distance ÷ time, a blank time gives distance ÷ speed, a blank distance gives speed × time.
Units?
Distance in km, time in hours, speed in km/h. Tick mph to show speed in mph and distance in miles.
What happens if I enter 0?
Zero and negative values are guarded, so no Infinity or NaN appears. Asking for speed with time set to 0, for example, shows "Values must be greater than zero."