Convert speed units — km/h, mph, m/s, knots, mach and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ft/s | 0.00109728 km/h | |
| 0.01 ft/s | 0.0109728 km/h | |
| 0.1 ft/s | 0.109728 km/h | |
| 1 ft/s | 1.09728 km/h | |
| 5 ft/s | 5.4864 km/h | |
| 10 ft/s | 10.9728 km/h | |
| 50 ft/s | 54.864 km/h | |
| 100 ft/s | 109.728 km/h | |
| 1000 ft/s | 1097.28 km/h |
Common foot per second values converted to kilometer per hour — factor: 1 ft/s = 1.097 km/h
| Foot per Second (ft/s) | Kilometer per Hour (km/h) | Context |
|---|---|---|
| 1 ft/s | 1.097 km/h | Very slow |
| 5 ft/s | 5.486 km/h | Walk |
| 10 ft/s | 10.97 km/h | Jog |
| 20 ft/s | 21.95 km/h | Sprint |
| 50 ft/s | 54.86 km/h | Fast sprint |
| 88 ft/s | 96.56 km/h | 60 mph car |
| 100 ft/s | 109.7 km/h | 60 mph car |
| 147 ft/s | 161.3 km/h | 100 mph car |
| 500 ft/s | 548.6 km/h | Racing car |
| 880 ft/s | 965.6 km/h | 600 mph jet |
| 1,000 ft/s | 1,097 km/h | High-speed jet |
| 1,125 ft/s | 1,234 km/h | Speed of sound |
| 2,200 ft/s | 2,414 km/h | Rifle bullet |
| 3,000 ft/s | 3,292 km/h | Fast bullet |
| 5,000 ft/s | 5,486 km/h | Rocket |
Converting foot per second to kilometer per hour is essential for drivers, pilots, engineers, and scientists working across different measurement systems. Road speed limits, aviation airspeed, nautical navigation, and physics calculations each use different speed units, making quick and accurate conversion a practical everyday skill.
Key reference points: 5 ft/s = 5.486 km/h and 10 ft/s = 10.97 km/h. At higher speeds, 100 ft/s = 109.7 km/h. For reverse conversion, multiply km/h values by 0.9113 to get back to ft/s.
All conversions use the internationally recognized factor of exactly 1 ft/s = 1.097 km/h. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Kilometer per Hour = Foot per Second × 1.0972791
Multiply any foot per second value by 1.0972791 to get kilometer per hour. One foot per second equals 1.0972791 km/h.
Reverse: Foot per Second = Kilometer per Hour × 0.91134514
ft/s × 1.0973 = km/h. Almost 1:1 — very close in value.
One foot per second is very close to one kilometer per hour.
km/h × 0.9113 = ft/s.
Rates bullet muzzle velocity in feet per second for ammunition comparisons.
Measures duct air velocity in feet per second for airflow design.
Evaluates arrow speed in fps to optimize bow setup and shooting form.
Sets character movement speeds in fps for physics-based game engines.
Calculates water hammer and pipe flow velocities in ft/s.
References pitch speed, puck speed, and serve speed in fps for broadcast.
Feet per second is an Imperial unit of speed equal to exactly 0.3048 m/s. It was in common use in Britain and America from the 17th century, particularly in ballistics and military applications.
ft/s remains the standard in US ballistics: bullet velocities, muzzle speeds, and arrow velocities are universally quoted in feet per second. It also appears in HVAC airflow measurements and some engineering contexts.
Interesting fact: A typical rifle bullet travels at 900-1,200 ft/s (270-370 m/s). The speed of sound at sea level is approximately 1,125 ft/s.
Kilometers per hour became the standard road speed unit when France adopted the metric system in the late 18th century. As the metric system spread globally through the 19th and 20th centuries, km/h became the dominant speed unit for road transport, aviation weather, and sports in most of the world.
Today, km/h appears on road signs, vehicle speedometers, and weather reports in over 160 countries. It is the official unit in the European Union, China, India, and most of Asia, Africa, and South America.
Interesting fact: Formula 1 cars reach over 350 km/h, and the land speed record stands at 1,228 km/h — set by the Thrust SSC in 1997, breaking the sound barrier on land.