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

Converting kilometers per hour to feet per second 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 kilometers per hour

   Start with the number of kilometers per hour (km/h) you want to convert.
2. 2
   Multiply by 0.911344

   The conversion factor from km/h to ft/s is 0.911344. Multiply your value by this number.
3. 3
   Read the result in feet per second

   The result is your value in feet per second (ft/s).

Multiply the value in kilometers per hour by 0.911344. For the reverse direction, multiply by 1.09728.

• ✓1 km/h = 0.2778 m/s. Divide by 3.6 for m/s.
• ✓1 km/h = 0.621 mph. Multiply by 0.62 for a quick mph estimate.
• ✓Speed limits: 30 km/h urban, 50 km/h town, 80–100 km/h rural, 110–130 km/h motorway in most of EU.

• ✗Using mph values on a km/h speedometer — may misread actual speed.
• ✗Converting km/h to m/s by dividing by 3 — correct is 3.6.
• ✗Ignoring "E" for exit or other signs while focused on speed limits.

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)

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