Calculate speed, distance, or travel time. Enter any two values to find the third — perfect for road trips, running, cycling, and physics problems.
The three variables are linked by one simple formula: Speed = Distance ÷ Time. Rearranged:
| Speed | 100 km distance | 100 mile distance |
|---|---|---|
| 30 mph / 48 km/h | 2h 5m | 3h 20m |
| 60 mph / 97 km/h | 1h 2m | 1h 40m |
| 70 mph / 113 km/h | 53m | 1h 26m |
| 100 mph / 161 km/h | 37m | 1h |