Speed Converter
Convert between all speed units — mph, km/h, knots, Mach, and more
Real-Time
7 Units
Mach & Light
Converted Values
Common Speed References
| Speed | km/h | mph | m/s |
|---|---|---|---|
| Walking | 5 | 3.1 | 1.4 |
| Cycling | 20 | 12.4 | 5.6 |
| Highway driving | 120 | 74.6 | 33.3 |
| Bullet train | 320 | 199 | 88.9 |
| Commercial jet | 900 | 559 | 250 |
| Speed of sound | 1,235 | 767 | 343 |
FAQ
Multiply mph by 1.60934. Example: 60 mph × 1.60934 = 96.56 km/h. A quick approximation: multiply by 1.6.
Mach 1 is the speed of sound — approximately 343 m/s (767 mph) at sea level and 15°C. Mach speed varies with temperature and altitude. Supersonic flight is Mach 1+, hypersonic is Mach 5+.