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default conversion combinations SI: metre per second: m/s m/s US spelling: meter per second: 1.0 m/s (3.3 ft/s) m/s ft/s (m/s foot/s) non-SI metric: kilometre per hour: km/h km/h US spelling: kilometer per hour: 1.0 km/h (0.62 mph) km/h mph; Imperial & US customary: mile per hour: mph mph 1.0 mph (1.6 km/h) mph km/h; mile per second: mi/s mi/s ...
Speed limit sign in the Republic of Ireland, using "km/h.". The SI representations, classified as symbols, are "km/h", "km h −1" and "km·h −1".Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph", [3] [4] [5] "kmph" and "km/hr" [6] as English abbreviations.
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
km/h mph: Mach number: mi/d: mi/d: 1.8626666666666667e-2: mile per day: miles per day: km/d: Orders of magnitude (speed) mi/s: mi/s: 1609.344: mile per second: miles per second: km/s: Mile: mm/h: mm/h: 0.001/60/60: millimetre per hour: millimetres per hour: millimeter per hour: millimeters per hour: in/h: Metre per second: mph: mph: 0.44704 ...
mph: mph: 0.44704: mile per hour: miles per hour: km/h: Miles per hour: Ns/kg: N-s/kg: 1: N-s/kg: N-s/kg: isp: Specific impulse: si tsfc: g/(kN·s) 1/101972/9.80665: invert: g/(kN·s) g/(kN·s) tsfc: Thrust specific fuel consumption: tsfc: lb/(lbf·h) 1/9.80665/3600: invert: lb/(lbf·h) lb/(lbf·h) si tsfc: Thrust specific fuel consumption: kWh ...
4–7 mph 6–11 km/h 1.6–3.3 m/s 1–2 ft 0.3–0.6 m Small wavelets still short but more pronounced; crests have a glassy appearance but do not break Wind felt on face; leaves rustle; wind vane moved by wind 3 Gentle breeze 7–10 knots 8–12 mph 12–19 km/h 3.4–5.4 m/s 2–4 ft 0.6–1.2 m Large wavelets; crests begin to break; foam of ...
The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]
Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...