About Speed Converter
This converter tool allows you to convert between different speed units used in physics, engineering, aviation, maritime, and everyday measurements.
Common Speed Conversions
| From |
To |
Conversion Factor |
| 1 m/s |
3.6 km/h |
Multiply by 3.6 |
| 1 mph |
1.60934 km/h |
Multiply by 1.60934 |
| 1 knot |
1.852 km/h |
Multiply by 1.852 |
| 1 km/h |
0.621371 mph |
Multiply by 0.621371 |
| 1 m/s |
2.23694 mph |
Multiply by 2.23694 |
| 1 Mach |
1225.044 km/h |
Multiply by 1225.044 |
| 1 speed of light |
1,079,252,848.8 km/h |
Multiply by 1,079,252,848.8 |
| 1 cosmic velocity (first) |
27,000 km/h |
Multiply by 27,000 |
Did You Know?
- Knot is a unit of speed equal to one nautical mile per hour, used in maritime and aviation.
- Mach number represents the ratio of an object's speed to the speed of sound in the surrounding medium.
- Cosmic velocities are reference velocities used in astronautics (first cosmic velocity = orbital velocity).
- The speed of light in vacuum is exactly 299,792,458 m/s by definition.
- Earth's orbital speed around the Sun is about 107,000 km/h (29.78 km/s).