This speed distance time calculator finds any one of the three when you know the other two. Choose what you want to find, enter the other two values and it uses the formula speed = distance ÷ time, rearranged as needed.
Results are shown in kilometres per hour and metres per second, and time in both hours and minutes, so it works for school physics problems, journey planning and running or cycling pace.
| Find | Speed |
| Distance | 150 km |
| Time | 2.5 hours |
| Speed (km/h) | 60 |
| Speed (m/s) | 16.6667 |
| Distance (km) | 150 |
| Time (hours) | 2.5 |
| Time (minutes) | 150 |
150 km in 2.5 hours is an average speed of 60 km/h, or 16.6667 m/s.
Try this example →| Find | Time |
| Distance | 45 km |
| Speed | 60 km/h |
| Speed (km/h) | 60 |
| Speed (m/s) | 16.6667 |
| Distance (km) | 45 |
| Time (hours) | 0.75 |
| Time (minutes) | 45 |
At 60 km/h, 45 km takes 45 minutes.
Try this example →Write D at the top of a triangle and S and T at the bottom. Cover the one you want: D = S × T, S = D ÷ T and T = D ÷ S. Always use matching units — km with hours, or metres with seconds.
If you drive 60 km at 30 km/h and then 60 km at 60 km/h, the average speed is not 45 km/h. The trip takes 2 h + 1 h = 3 h for 120 km, so the average is 40 km/h. Always divide total distance by total time.
Speed = distance ÷ time. If you travel 100 km in 2 hours, your speed is 50 km/h.
Divide by 3.6. For example, 72 km/h ÷ 3.6 = 20 m/s. To go from m/s to km/h, multiply by 3.6.
Time = distance ÷ speed. 180 km at 60 km/h takes 3 hours.
No. Speed is how fast something moves. Velocity is speed in a given direction, so it is a vector. This calculator works with speed.