Calculate speed, distance, or time — enter any two values to find the third.
Leave one field blank — it will be calculated automatically.
| Mode | Typical Speed | 100 km in… |
|---|---|---|
| Walking | 5 km/h | 20 hours |
| Cycling | 20 km/h | 5 hours |
| City car | 40 km/h | 2.5 hours |
| Highway car | 100 km/h | 1 hour |
| Bullet train | 300 km/h | 20 minutes |
| Commercial flight | 900 km/h | 6.7 minutes |
| Speed of sound | 1,235 km/h | 4.9 minutes |
| Speed of light | 1,08,00,00,000 km/h | 0.0003 seconds |