# Kilometers Per Hour to Knots Converter

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Convert Knots to Kilometers Per Hour (kt to kph) ▶

## Conversion Table

 kilometers per hour to knots kph kt 1 kph 0.54 kt 2 kph 1.0799 kt 3 kph 1.6199 kt 4 kph 2.1598 kt 5 kph 2.6998 kt 6 kph 3.2397 kt 7 kph 3.7797 kt 8 kph 4.3197 kt 9 kph 4.8596 kt 10 kph 5.3996 kt 11 kph 5.9395 kt 12 kph 6.4795 kt 13 kph 7.0194 kt 14 kph 7.5594 kt 15 kph 8.0994 kt 16 kph 8.6393 kt 17 kph 9.1793 kt 18 kph 9.7192 kt 19 kph 10.2592 kt 20 kph 10.7991 kt

## How to convert

1 kilometer per hour (kph) = 0.539956803 knot (kt). Kilometer Per Hour (kph) is a unit of Speed used in Metric system. Knot (kt) is a unit of Speed used in Standard system.

## Definition of Kilometers Per Hour

Kilometers per hour (km/h) is a unit of speed that measures how fast something is moving in terms of kilometers per unit of time. It is commonly used in most countries around the world, except for the United States and some other countries that use the US Standard system of measurement. The speed limit signs on roads and highways are usually expressed in km/h.

One kilometer per hour is equal to 0.27777777777778 meters per second, or 3.6 meters per minute. It can also be converted to other units of speed, such as miles per hour, feet per second, or knots, by using appropriate conversion factors.

## How to Convert Kilometers Per Hour

To convert kilometers per hour to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert kilometers per hour to miles per hour, we need to multiply by 0.6213711922, since there are 0.6213711922 miles in one kilometer. To convert kilometers per hour to meters per second, we need to divide by 3.6, since there are 3.6 seconds in one minute.

Here are some examples of how to convert kilometers per hour to other units of length in the US Standard system and the SI system:

• To convert 10 km/h to miles per hour (mph), we multiply by 0.6213711922: 10 km/h x 0.6213711922 = 6.213711922 mph
• To convert 20 km/h to feet per second (fps), we multiply by 0.9113444153, since there are 0.9113444153 feet in one meter: 20 km/h x 0.9113444153 = 18.226888306 fps
• To convert 30 km/h to knots (kn), we multiply by 0.5399568035, since there are 0.5399568035 nautical miles in one kilometer: 30 km/h x 0.5399568035 = 16.198704105 kn
• To convert 40 km/h to meters per second (m/s), we divide by 3.6: 40 km/h / 3.6 = 11.111111111 m/s
• To convert 50 km/h to meters per minute (m/min), we multiply by 16.666666667, since there are 16.666666667 minutes in one hour: 50 km/h x 16.666666667 = 833.33333335 m/min
• To convert 60 km/h to centimeters per second (cm/s), we multiply by 1000, since there are 100 centimeters in one meter, and divide by 3.6: 60 km/h x 1000 / 3.6 = 16666.666667 cm/s

## Where Kilometers Per Hour Are Used

Kilometers per hour are mainly used in most countries around the world that use the SI system of measurement or the metric system. They are often used for car speeds and road signs, as well as for trains, planes, boats, and bicycles.

For example, a car may have a speed of 100 km/h, which means that it travels a distance of 100 kilometers in one hour. A road sign may indicate a speed limit of 80 km/h, which means that drivers should not exceed this speed on that road section. A train may have a speed of 300 km/h, which means that it covers a distance of 300 kilometers in one hour.

Kilometers per hour are also used in some other fields, such as sports, weather, and astronomy, where the speed or velocity of an object or phenomenon is measured in kilometers per unit of time.

## History of Kilometers Per Hour

The origin of kilometers per hour as a unit of speed can be traced back to the development of the metric system and the kilometer as a unit of length in the late eighteenth century. The kilometer was defined as one ten-thousandth of the distance from the equator to the North Pole along a meridian through Paris.

The term kilometer first appeared in English in 1810, but it was not until later in the mid-nineteenth century that the use of kilometers per hour became more widespread; before that, other units such as miles per hour or leagues per hour were preferred for expressing speed.

Kilometers per hour have been used ever since as a standard unit of speed for most countries around the world that use the SI system or the metric system. They have also been adopted by some international organizations and conventions, such as the International Civil Aviation Organization and the International System of Units.

## Example Conversions of Kilometers Per Hour to Other Units

Here are some examples of how to convert kilometers per hour to other units of speed, using the conversion factors given above:

• To convert 100 km/h to miles per hour, we multiply by 0.6213711922: 100 km/h x 0.6213711922 = 62.13711922 mph
• To convert 200 km/h to feet per second, we multiply by 0.9113444153: 200 km/h x 0.9113444153 = 182.26887661 fps
• To convert 300 km/h to knots, we multiply by 0.5399568035: 300 km/h x 0.5399568035 = 161.98704105 kn
• To convert 400 km/h to meters per second, we divide by 3.6: 400 km/h / 3.6 = 111.11111111 m/s
• To convert 500 km/h to meters per minute, we multiply by 16.666666667: 500 km/h x 16.666666667 = 8333.3333335 m/min
• To convert 600 km/h to centimeters per second, we multiply by 1000 and divide by 3.6: 600 km/h x 1000 / 3.6 = 166666.666667 cm/s
• To convert 700 km/h to millimeters per minute, we multiply by 1000000, since there are 1000000 millimeters in one kilometer, and divide by 60, since there are 60 minutes in one hour: 700 km/h x 1000000 / 60 = 11666666.666667 mm/min
Kilometers per hour also can be marked as km/h and Kilometres per hour(alternative British English spelling in UK).

## Definition of Knots

Knots, commonly denoted kn, 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). It is the standard unit of speed used in meteorology, and in maritime and air navigation. A vessel travelling at 1 kn along a meridian travels approximately one minute of geographic latitude in one hour.

## How to Convert Knots

To convert knots to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert knots to kilometers per hour, we need to multiply by 1.852, since there are 1.852 kilometers in one nautical mile. To convert knots to meters per second, we need to divide by 3.6, since there are 3.6 seconds in one hour.

Here are some examples of how to convert knots to other units of length in the US Standard system and the SI system:

• To convert 10 kn to kilometers per hour (km/h), we multiply by 1.852: 10 kn x 1.852 = 18.52 km/h
• To convert 20 kn to miles per hour (mph), we multiply by 1.1507794480235, since there are 1.1507794480235 miles in one nautical mile: 20 kn x 1.1507794480235 = 23.01558896047 mph
• To convert 30 kn to feet per second (fps), we multiply by 1.6878098571012, since there are 1.6878098571012 feet in one meter: 30 kn x 1.6878098571012 = 50.634295713036 fps
• To convert 40 kn to meters per second (m/s), we divide by 3.6: 40 kn / 3.6 = 11.111111111111 m/s
• To convert 50 kn to meters per minute (m/min), we multiply by 60, since there are 60 minutes in one hour: 50 kn x 60 = 3,000 m/min
• To convert 60 kn to centimeters per second (cm/s), we multiply by 100, since there are 100 centimeters in one meter, and divide by 3.6: 60 kn x 100 / 3.6 = 5,000 cm/s

## Where Knots Are Used

Knots are used in various fields of science and technology where the speed and direction of movement of objects or phenomena are measured or applied in relation to water or air currents. For example:

• In meteorology, knots are used to measure wind speed and direction, as well as the speed and direction of storms, hurricanes, and other weather phenomena.
• In maritime navigation, knots are used to measure the speed and direction of ships, boats, submarines, and other watercraft, as well as the speed and direction of ocean currents, tides, and waves.
• In air navigation, knots are used to measure the speed and direction of aircraft, helicopters, rockets, satellites, and other aerospace vehicles, as well as the speed and direction of air currents, jet streams, and wind shear.

## History of Knots

The origin of knots as a unit of speed can be traced back to the ancient practice of measuring the speed of ships by using a device called a chip log or log-line. This device consisted of a wooden board attached to a rope with knots tied at regular intervals along its length. The board was thrown overboard from the stern of the ship and allowed to drag behind it while the rope was let out for a fixed amount of time (usually measured by a sandglass). The number of knots that passed over the rail of the ship during that time indicated the speed of the ship in nautical miles per hour.

The first recorded use of this method was by the Phoenicians around the second millennium BCE. The device was later improved and standardized by various civilizations such as the Greeks, Romans, Arabs, Vikings, Chinese, and Europeans. The length of the nautical mile and the spacing of the knots varied from place to place and from time to time until they were fixed by international agreement in the late nineteenth century.

The term knot was derived from the Old English word cnotta meaning “a knot”. It was first used as a unit of speed by English sailors in the early seventeenth century.

## Example Conversions of Knots to Other Units

Here are some examples of how to convert knots to other units of speed, using the conversion factors given above:

• To convert 100 kn to kilometers per hour, we multiply by 1.852: 100 kn x 1.852 = 185.2 km/h
• To convert 200 kn to miles per hour, we multiply by 1.1507794480235: 200 kn x 1.1507794480235 = 230.15589792094 mph
• To convert 300 kn to feet per second, we multiply by 1.6878098571012: 300 kn x 1.6878098571012 = 506.34295713011 fps
• To convert 400 kn to meters per second, we divide by 3.6: 400 kn / 3.6 = 111.11111111111 m/s
• To convert 500 kn to meters per minute, we multiply by 60: 500 kn x 60 = 30,000 m/min
• To convert 600 kn to centimeters per second, we multiply by 100 and divide by 3.6: 600 kn x 100 / 3.6 = 50,000 cm/s
• To convert 700 kn to millimeters per minute, we multiply by 1000, since there are 1000 millimeters in one meter, and multiply by 60: 700 kn x 1000 x 60 = 42,000,000 mm/min
Knots can be also marked as kn. 1 international knot = 1 nautical mile per hour.

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