Mile per Hour to Kilometer per Second Conversion
Convert between Mile per Hour and Kilometer per Second quickly and accurately.
How to Convert Mile per Hour to Kilometer per Second
Conversion Formula
Example
Convert 15 mph to km/s:
Unit Information
Learn about the speed units you're converting between
Mile per Hour
mph
Definition
The mile per hour is a unit of speed expressing the number of statute miles traveled in one hour. It is primarily used in the United States, United Kingdom, and other countries that have not fully adopted the metric system for everyday measurements.
History/Origin
Mile per hour has its origins in the British Imperial system and was widely used in the British Empire. It became the standard speed unit in the United States and remains the primary unit for road traffic, aviation, and weather reporting in these countries.
Current Use
Mile per hour is used for speed limits, speedometers, weather reports, and aviation in the US, UK, and other imperial system countries. It is also commonly used in sports, particularly in motorsports and athletics in these regions.
Multiplier
0.447
Offset
0
Kilometer per Second
km/s
Definition
The kilometer per second is a unit of speed representing the distance of one kilometer traveled in one second. It is used for measuring extremely high speeds such as those of spacecraft, projectiles, or other high-velocity objects in physics and engineering.
History/Origin
Kilometer per second was developed for measuring extremely high velocities in physics, astronomy, and aerospace engineering. It became essential for expressing speeds of spacecraft, satellites, and other high-velocity objects in space exploration.
Current Use
Kilometer per second is used in aerospace engineering for spacecraft velocities, in physics for high-speed particle studies, in astronomy for celestial object speeds, and in military applications for projectile velocities.
Multiplier
1000
Offset
0
Mile per Hour to Kilometer per Second Conversion Table
| Mile per Hour [mph] | Kilometer per Second [km/s] |
|---|---|
| 1 mph | 0.000447 km/s |
| 10 mph | 0.00447 km/s |
| 25 mph | 0.011176 km/s |
| 50 mph | 0.022352 km/s |
| 100 mph | 0.044704 km/s |
| 0 mph | 0E+0 km/s |
| -10 mph | -0.00447 km/s |
| -40 mph | -0.017882 km/s |
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