This unit is sometimes written kph, although in general this is casual rather than rigorous usage.
| 5 km/h | Walking speed |
| 20 km/h | Easy bicycling speed |
| 50 km/h | Residential speed limit |
| 80-90 km/h | Speed limit on a major road |
| 110-120 km/h | Highway speed |
| 300 km/h | High-speed railroad |
| 1000 km/h | Airliner cruising speed |
| 40,320 km/h | Earth's escape velocity |