Information about Kilometres Per Hour
Kilometres per hour (American English: kilometers per hour) is a unit of both speed (scalar) and velocity (vector). The unit symbol is km/h or km·h−1; however, the abbreviations "kph" and "kmph" are sometimes also seen in English-speaking countries, in analogy to mph. In North American slang and military usage, km/h (as well as km) is commonly pronounced, and sometimes even written, as klicks or kays (K's).
By definition, an object travelling at a speed of 1 km/h for 1 hour moves 1 kilometre.
The km/h is the worldwide most commonly used speed unit on road signs and car speedometers. Therefore, it is far more common in everyday usage than the proper SI unit of speed, m/s. Along with the kWh, km/h is the most commonly used metric unit based on the hour, which is only a "non-SI unit accepted for use with the International System of Units" by the BIPM.[1]
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By definition, an object travelling at a speed of 1 km/h for 1 hour moves 1 kilometre.
The km/h is the worldwide most commonly used speed unit on road signs and car speedometers. Therefore, it is far more common in everyday usage than the proper SI unit of speed, m/s. Along with the kWh, km/h is the most commonly used metric unit based on the hour, which is only a "non-SI unit accepted for use with the International System of Units" by the BIPM.[1]
Conversions
- 3.6 km/h ≡ 1 m/s, the SI derived unit of speed, metre per second
- 1 km/h ≈ 0.277 78 m/s
- 1 km/h ≈ 0.621 37 mph ≈ 0.911 34 feet per second
- 1 knot ≡ 1.852 km/h (exactly)
- 1 mile = 1.609344 km (~1.61 km)[2]
- 1 mile per hour = ~1.61 kilometres per hour
- 1 kilometre per hour = ~0.62 miles per hour
See also
References
1. ^ BIPM brochure (SI reference)
2. ^ 1 yard ≡ 0.9144 m and
1 mile = 1760 yards thus
1 mile = 1760 × 0.9144 ÷ 1000 km
2. ^ 1 yard ≡ 0.9144 m and
1 mile = 1760 yards thus
1 mile = 1760 × 0.9144 ÷ 1000 km
External links
- The converter Online conversions for speed units: km/h, mph, knots, etc.
- Conversion Calculator for Units of Speed
American English (AmE, AE, AmEng, USEng, en-US), also known as United States English or U.S. English, is a set of dialects of the English language used mostly in the United States.
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units of measurement have played a crucial role in human endeavour from early ages up to this day. Disparate systems of measurement used to be very common. Now there is a global standard, the International System (SI) of units, the modern form of the metric system.
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Speed is the rate of motion, or equivalently the rate of change in position, many times expressed as distance d traveled per unit of time t.
Speed is a scalar quantity with dimensions distance/time; the equivalent vector quantity to speed is known as
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Speed is a scalar quantity with dimensions distance/time; the equivalent vector quantity to speed is known as
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scalar is a simple physical quantity that does not depend on direction, and is therefore not changed by coordinate system rotations (in Newtonian mechanics), or by Lorentz transformations (in relativity). (Contrast to vector.
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velocity is defined as the rate of change of position. It is a vector physical quantity, both speed and direction are required to define it. In the SI (metric) system, it is measured in meters per second (m/s). The scalar absolute value (magnitude) of velocity is speed.
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spatial vector, or simply vector, is a concept characterized by a magnitude and a direction. A vector can be thought of as an arrow in Euclidean space, drawn from an initial point A pointing to a terminal point B.
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Miles per hour is a unit of speed, expressing the number of international miles covered per hour.
Miles per hour is the unit used for speed limits, and speeds, on roads in the United Kingdom, United States and some other nations, where it is commonly abbreviated in everyday
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Miles per hour is the unit used for speed limits, and speeds, on roads in the United Kingdom, United States and some other nations, where it is commonly abbreviated in everyday
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Slang is the use of highly informal words and expressions that are not considered standard in the speaker's dialect or language. Slang is often highly regional, specific to a particular territory.
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1 kilometre =
SI units
0 m 0106 mm
US customary / Imperial units
0 ft 0 mi
A kilometre (American spelling: kilometer, symbol kmSI units
0 m 0106 mm
US customary / Imperial units
0 ft 0 mi
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International System of Units (abbreviated SI from the French Le Système international d'unités) is the modern form of the metric system.
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Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.
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watt-hour (symbol W·h or Wh) is a unit of energy. It is most commonly used on household electricity meters in the form of the kilowatt-hour (kW·h or kWh), which is 1,000 watt-hours.
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The International Bureau of Weights and Measures is the English translation of the name of the Bureau international des poids et mesures (BIPM), a standards organisation, one of the three organisations established to maintain the International System of Units (SI)
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SI derived units are part of the SI system of measurement units and are derived from the seven SI base units.
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Dimensionless derived units
The following SI units are actually dimensionless ratios, formed by dividing two identical SI units...... Click the link for more information.
Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.
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Miles per hour is a unit of speed, expressing the number of international miles covered per hour.
Miles per hour is the unit used for speed limits, and speeds, on roads in the United Kingdom, United States and some other nations, where it is commonly abbreviated in everyday
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Miles per hour is the unit used for speed limits, and speeds, on roads in the United Kingdom, United States and some other nations, where it is commonly abbreviated in everyday
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Feet per second (Or foot per second) is a unit of both speed (scalar) and velocity (vector quantity, e.g. 3ft/s west). It expresses the distance in feet (ft) traveled or displaced, divided by the time in seconds (s, or sec).
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knot is a unit of speed. The abbreviation preferred by maritime authorities in the USA[1], and Canada [2], as well as the Institute of Electrical and Electronics Engineers and the International Bureau of Weights and Measures is kn.
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List of orders of magnitude for speed
Factor Value (m/s) Value (km/h) Item
10-9 1.310-9 4.6810-9 Average rate of the Moon receding from the Earth.
0.
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Factor Value (m/s) Value (km/h) Item
10-9 1.310-9 4.6810-9 Average rate of the Moon receding from the Earth.
0.
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