Convert Foot per Second to Kilometer per Hour (ft/s → km/h)

Converting feet per second to kilometers per hour is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in feet per second

   Start with the number of feet per second (ft/s) you want to convert.
2. 2
   Multiply by 1.09728

   The conversion factor from ft/s to km/h is 1.09728. Multiply your value by this number.
3. 3
   Read the result in kilometers per hour

   The result is your value in kilometers per hour (km/h).

Multiply the value in feet per second by 1.09728. For the reverse direction, multiply by 0.911344.

• ✓1 ft/s = 0.3048 m/s = 1.097 km/h = 0.682 mph.
• ✓Multiplying ft/s by 0.682 gives mph.
• ✓US engineering often uses ft/s; metric countries use m/s.

• ✗Confusing ft/s with fps (frames per second in video/gaming).
• ✗Mixing ft/s with mph without conversion.
• ✗Using ft/s instead of m/s in international scientific contexts.

What is the Foot per Second?

Feet per second is the standard ballistics unit for projectile speeds, American sports analytics, and engineering. Bullet velocities are universally given in fps: a .22 LR bullet flies at about 1,200 fps, a 9 mm pistol round at 1,150 fps, and a high-velocity rifle round at 3,000 fps. American football and baseball analytics increasingly use fps for measuring throwing speed, ball exit velocity, and player movement. Engineering disciplines that retain US customary units (HVAC, civil engineering) often specify air or water flow speeds in fps. The unit relates to mph (1.467 fps = 1 mph), m/s (1 fps ≈ 0.305 m/s), and the knot (1 fps ≈ 0.592 kn). Outside ballistics and US sports, m/s and km/h dominate — but in their domains, fps remains entrenched in American technical practice.

• US ballistics and firearms
• US civil-engineering flow rates
• Older US physics and engineering texts

What is the Kilometer per Hour?

Kilometers per hour is the universal road-speed and weather wind-speed unit in 195 countries — every nation outside the United States, the United Kingdom, and a handful of Caribbean territories. Speed limits on European, Asian, Australian, African, and Latin American roads are posted in km/h: typical urban limits are 50 km/h, highway 100–130 km/h. Weather reports give wind speeds in km/h universally. The unit derives directly from the kilometer (distance) and hour (time): 1 km/h ≈ 0.278 m/s. Car speedometers in metric countries display km/h prominently, with smaller mph numbers for travel to the UK. Olympic 100-meter sprints reach 36–37 km/h, urban cyclists travel at 15–25 km/h, and commercial trains in Europe cruise at 200–300 km/h. The unit relates to mph (1 km/h ≈ 0.621 mph), m/s (3.6 km/h = 1 m/s), and the knot (1 km/h ≈ 0.540 kn).

• European and global road speed limits
• Car and motorcycle speedometers
• Weather wind speed reporting (in some regions)