# Kilometers Per Day to Kilometers Per Second Converter

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Convert Kilometers Per Second to Kilometers Per Day (km/s to km/day) ▶

## Conversion Table

 kilometers per day to kilometers per second km/day km/s 10000 km/day 0.1157 km/s 20000 km/day 0.2315 km/s 30000 km/day 0.3472 km/s 40000 km/day 0.463 km/s 50000 km/day 0.5787 km/s 60000 km/day 0.6944 km/s 70000 km/day 0.8102 km/s 80000 km/day 0.9259 km/s 90000 km/day 1.0417 km/s 100000 km/day 1.1574 km/s 110000 km/day 1.2732 km/s 120000 km/day 1.3889 km/s 130000 km/day 1.5046 km/s 140000 km/day 1.6204 km/s 150000 km/day 1.7361 km/s 160000 km/day 1.8519 km/s 170000 km/day 1.9676 km/s 180000 km/day 2.0833 km/s 190000 km/day 2.1991 km/s 200000 km/day 2.3148 km/s

## How to convert

1 kilometer per day (km/day) = 1.15741E-05 kilometer per second (km/s). Kilometer Per Day (km/day) is a unit of Speed used in Metric system. Kilometer Per Second (km/s) is a unit of Speed used in Metric system.

## Definition of Kilometers Per Day

Kilometers per day (km/d) is a unit of speed that measures how fast something is moving in terms of kilometers per unit of time. It is a metric unit that is derived from the base unit of length, the kilometer, and the base unit of time, the day. It is rarely used however, as the units of kilometers per hour and meters per second are considered sufficient for most situations.

One kilometer per day is equal to 0.011574074074074 meters per second, or 0.041666666666667 kilometers per hour. 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 Day

To convert kilometers per day to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert kilometers per day to miles per hour, we need to multiply by 0.0254, since there are 0.0254 miles in one kilometer. To convert kilometers per day to meters per second, we need to multiply by 0.011574074074074, since there are 0.011574074074074 meters in one kilometer.

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

• To convert 10 km/d to miles per hour (mph), we multiply by 0.0254: 10 km/d x 0.0254 = 0.254 mph
• To convert 20 km/d to feet per second (fps), we multiply by 0.0378788, since there are 0.037878788 feet in one meter: 20 km/d x 0.037878788 = 0.75757576 fps
• To convert 30 km/d to knots (kn), we multiply by 0.0218645833, since there are 0.021864583 nautical miles in one kilometer: 30 km/d x 0.0218645833 = 0.6559375 kn
• To convert 40 km/d to meters per second (m/s), we multiply by 0.011574074074074: 40 km/d x 0.011574074074074 = 0.462962962963 m/s
• To convert 50 km/d to meters per minute (m/min), we multiply by 0.6944444, since there are 0.6944444 minutes in one hour: 50 km/d x 0.6944444 = 34.722222 m/min
• To convert 60 km/d to centimeters per second (cm/s), we multiply by 100, since there are 100 centimeters in one meter, and multiply by 0.011574074074074: 60 km/d x 100 x 0.011574074074074 = 69.444444 cm/s

## Where Kilometers Per Day Are Used

Kilometers per day are mainly used for measuring the average speed or distance traveled by an object or phenomenon over a period of time that is measured in days or longer. They are often used in fields such as travel, fitness, sports, and geography, where the speed or distance traveled by an object or phenomenon is measured in terms of kilometers per unit of time.

For example, a person may travel an average of 100 km/d on a road trip across a country, which means that they cover an average distance of 100 kilometers in one day. A runner may run an average of 5 km/d as part of their training routine, which means that they run a distance of 5 kilometers in one day. A planet may have an orbital velocity of thousands of kilometers per day, which means that it covers thousands of kilometers along its orbit in one day.

Kilometers per day are also used in some other fields where the speed or distance traveled by an object or phenomenon is measured in terms of kilometers per unit of time.

## History of Kilometers Per Day

The origin of kilometers per day 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 thousand meters based on the French standard meter.

The term kilometer first appeared in English in 1810, but it was not until later in the mid-late 19 th century that the use of kilometers per day became more common; before that, other units such as miles per day or leagues per day were preferred for expressing speed.

Kilometers per day have been used ever since as a standard unit of speed for measuring the average speed or distance traveled by an object or phenomenon over a period of time that is measured in days or longer. They have also been adopted by some international organizations and conventions, such as the International System of Units and the International Astronomical Union.

## Example Conversions of Kilometers Per Day to Other Units

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

• To convert 100 km/d to miles per hour, we multiply by 0.0254: 100 km/d x 0.0254 = 2.54 mph
• To convert 200 km/d to feet per second, we multiply by 0.037878788: 200 km/d x 0.037878788 = 7.5757576 fps
• To convert 300 km/d to knots, we multiply by 0.0218645833: 300 km/d x 0.0218645833 = 6.559375 kn
• To convert 400 km/d to meters per second, we multiply by 0.011574074074074: 400 km/d x 0.011574074074074 = 4.62962962963 m/s
• To convert 500 km/d to meters per minute, we multiply by 0.6944444: 500 km/d x 0.6944444 = 347.22222 m/min
• To convert 600 km/d to centimeters per second, we multiply by 100 and multiply by 0.011574074: 600 km/d x 100 x 0.01157407 = 694.44444 cm/s
• To convert 700 km/d to millimeters per minute, we multiply by 1000, since there are 1000 millimeters in one meter, and multiply by 0.6944444: 700 km/d x 1000 x 0.6944444 = 486111.111 mm/min
Kilometers per day also can be marked as kilometer/day and Kilometres per day (alternative British English spelling in UK).

## Kilometers per second: A unit of speed

Kilometers per second (km/s) is a unit of speed or velocity in the International System of Units (SI). It measures how fast an object is moving by calculating the distance traveled in kilometers divided by the time taken in seconds. For example, if a rocket travels 10 kilometers in 5 seconds, its speed is 2 km/s.

## How to convert kilometers per second

Kilometers per second can be converted to other units of speed or velocity by using simple conversion factors. Here are some common units and their conversion factors:

• Meters per second (m/s): To convert from km/s to m/s, multiply by 1000. To convert from m/s to km/s, divide by 1000. For example, 2 km/s is equal to 2000 m/s, and 500 m/s is equal to 0.5 km/s.
• Kilometers per hour (km/h): To convert from km/s to km/h, multiply by 3600. To convert from km/h to km/s, divide by 3600. For example, 2 km/s is equal to 7200 km/h, and 100 km/h is equal to 0.028 km/s.
• Miles per hour (mph): To convert from km/s to mph, multiply by 2236.94. To convert from mph to km/s, divide by 2236.94. For example, 2 km/s is equal to 4473.88 mph, and 60 mph is equal to 0.027 km/s.
• Knots (kn): To convert from km/s to kn, multiply by 1943.84. To convert from kn to km/s, divide by 1943.84. For example, 2 km/s is equal to 3887.68 kn, and 30 kn is equal to 0.015 km/s.
• Feet per second (ft/s): To convert from km/s to ft/s, multiply by 3280.84. To convert from ft/s to km/s, divide by 3280.84. For example, 2 km/s is equal to 6561.68 ft/s, and 100 ft/s is equal to 0.03 km/s.
• Miles per second (mi/s): To convert from km/s to mi/s, multiply by 0.621371. To convert from mi/s to km/s, divide by 0.621371. For example, 2 km/s is equal to 1.24 mi/s, and 1 mi/s is equal to 1.61 km/s.

## Where kilometers per second are used

Kilometers per second are mainly used in astronomy and space science to measure the speed or velocity of celestial bodies and spacecrafts.

For example, the Earth orbits the Sun at an average speed of about 30 km/s.

The Moon orbits the Earth at an average speed of about 1 km/s.

The International Space Station orbits the Earth at an average speed of about 7.66 km/s.

The Voyager 1 spacecraft, which is the farthest human-made object from Earth, travels at a speed of about 17 km/s.

The speed of light in a vacuum is about 300000 km/s.

## Definition of kilometers per second

According to the SI definition, one kilometer per second is the speed of a body that covers a distance of one kilometer in a time of one second.

Mathematically, it can be expressed as:

where v is the speed or velocity in kilometers per second, s is the distance traveled in kilometers, and t is the time taken in seconds.

## History of kilometers per second

The concept of speed or velocity has been studied since ancient times by philosophers and scientists such as Aristotle, Galileo, Newton, etc.

The kilometer was originally defined in 1793 by the French Academy of Sciences as one ten-millionth of the distance from the equator to the North Pole along a meridian through Paris.

The second was originally defined in terms of the Earth’s rotation as one eighty-six thousand four hundredth of a mean solar day.

The combination of these two units resulted in the kilometer per second as a unit of speed or velocity.

The kilometer per second was officially adopted as part of the SI system in 1960.

## Example conversions of kilometers per second to other units

Here are some examples of converting kilometers per second to other units of speed or velocity:

• 1 km/s =1000 m/s = 3600 km/h = 2236.94 mph = 1943.84 kn = 3280.84 ft/s = 0.62 mi/s
• 2 km/s = 2000 m/s = 7200 km/h = 4473.88 mph = 3887.68 kn = 6561.68 ft/s = 1.24 mi/s
• 5 km/s = 5000 m/s = 18000 km/h = 11184.7 mph = 9721.92 kn = 16404.2 ft/s = 3.11 mi/s
• 10 km/s = 10000 m/s = 36000 km/h = 22369.4 mph = 19438.4 kn = 32808.4 ft/s = 6.21 mi/s
• 20 km/s = 20000 m/s = 72000 km/h = 44738.8 mph = 38876.8 kn = 65616.8 ft/s = 12.43 mi/s
• 50 km/s = 50000 m/s = 180000 km/h = 111847 mph = 97219.2 kn = 164042 ft/s = 31.07 mi/s
• 100 km/s = 100000 m/s = 360000 km/h = 223694 mph = 194384 kn = 328084 ft/s = 62.14 mi/s
Kilometers per second also can be marked as km/s and kilometres per second(alternative British English spelling in UK).

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