# Kilometers Per Day to Mach Converter

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Convert Mach to Kilometers Per Day (M to km/day) ▶

## Conversion Table

 kilometers per day to mach km/day M 1000 km/day 0.034 M 2000 km/day 0.068 M 3000 km/day 0.102 M 4000 km/day 0.136 M 5000 km/day 0.1701 M 6000 km/day 0.2041 M 7000 km/day 0.2381 M 8000 km/day 0.2721 M 9000 km/day 0.3061 M 10000 km/day 0.3401 M 11000 km/day 0.3741 M 12000 km/day 0.4081 M 13000 km/day 0.4422 M 14000 km/day 0.4762 M 15000 km/day 0.5102 M 16000 km/day 0.5442 M 17000 km/day 0.5782 M 18000 km/day 0.6122 M 19000 km/day 0.6462 M 20000 km/day 0.6802 M

## How to convert

1 kilometer per day (km/day) = 3.40124E-05 mach (M). Kilometer Per Day (km/day) is a unit of Speed used in Metric system. Mach (M) 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).

## Definition of Mach

Mach, commonly denoted M or Ma, is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach, who studied gas dynamics and shock waves. Mach number is used to classify the flow regimes based on the effects of compressibility and shock waves on the flow.

## How to Convert Mach

To convert mach to other units of speed, we need to multiply by the local speed of sound in the medium, which depends on the temperature and pressure of the gas. For example, to convert mach to meters per second, we need to multiply by the speed of sound in air at sea level, which is about 340 m/s. To convert mach to kilometers per hour, we need to multiply by the speed of sound in air at sea level and by 3.6, since there are 3.6 seconds in one hour.

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

• To convert 1 M to meters per second (m/s), we multiply by 340: 1 M x 340 = 340 m/s
• To convert 2 M to kilometers per hour (km/h), we multiply by 340 and by 3.6: 2 M x 340 x 3.6 = 2448 km/h
• To convert 3 M to miles per hour (mph), we multiply by 340 and by 2.2369362920544, since there are 2.2369362920544 miles in one kilometer: 3 M x 340 x 2.2369362920544 = 2285.714285714 mph
• To convert 4 M to feet per second (fps), we multiply by 340 and by 3.2808398950131, since there are 3.2808398950131 feet in one meter: 4 M x 340 x 3.2808398950131 = 4465.306122449 fps
• To convert 5 M to knots (kn), we multiply by 340 and by 1.9438444924406, since there are 1.9438444924406 nautical miles in one kilometer: 5 M x 340 x 1.9438444924406 = 3316.326530612 kn
• To convert 6 M to centimeters per second (cm/s), we multiply by 340 and by 100, since there are 100 centimeters in one meter: 6 M x 340 x 100 = 204000 cm/s

## Where Mach Is Used

Mach is 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 the speed of sound in the medium. For example:

• In aerodynamics and aeronautics, mach is used to measure the speed and performance of aircraft, rockets, missiles, and other flying vehicles, as well as the effects of air resistance, drag, lift, and thrust on them.
• In acoustics and sound engineering, mach is used to measure the intensity and frequency of sound waves, as well as the effects of reflection, refraction, diffraction, interference, and Doppler shift on them.
• In meteorology and climatology, mach is used to measure the speed and direction of wind, storms, hurricanes, tornadoes, and other weather phenomena, as well as the effects of temperature, pressure, humidity, and density on them.

## History of Mach

The concept of mach number was first introduced by Swiss engineer Jakob Ackeret in his doctoral thesis in 1929. He proposed it as a convenient way to express the ratio of flow velocity to speed of sound in gas dynamics problems. He also named it after Ernst Mach, who had conducted experiments on supersonic projectiles and shock waves in the late nineteenth century.

The term mach number was later popularized by German-American engineer Theodore von Karman, who used it extensively in his research on aerodynamics and supersonic flight in the early twentieth century. He also established the first supersonic wind tunnel at Caltech in 1939.

The first human-made object to break the sound barrier was a rocket-powered plane called Bell X-1 piloted by Chuck Yeager in October 1947. He achieved a speed of about Mach 1.06 at an altitude of 13,000 meters.
The first human to travel faster than sound was Soviet cosmonaut Yuri Gagarin, who orbited the Earth at a speed of about Mach 25 in April 1961.
The fastest manned aircraft ever flown was the North American X-15, which reached a speed of about Mach 6.7 in October 1967.

The fastest unmanned aircraft ever flown was the NASA X-43A, which reached a speed of about Mach 9.6 in November 2004.

## Example Conversions of Mach to Other Units

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

• To convert 1 M to meters per second, we multiply by 340: 1 M x 340 = 340 m/s
• To convert 2 M to kilometers per hour, we multiply by 340 and by 3.6: 2 M x 340 x 3.6 = 2448 km/h
• To convert 3 M to miles per hour, we multiply by 340 and by 2.2369362920544: 3 M x 340 x 2.2369362920544 = 2285.714285714 mph
• To convert 4 M to feet per second, we multiply by 340 and by 3.2808398950131: 4 M x 340 x 3.2808398950131 = 4465.306122449 fps
• To convert 5 M to knots, we multiply by 340 and by 1.9438444924406: 5 M x 340 x 1.9438444924406 = 3316.326530612 kn
• To convert 6 M to centimeters per second, we multiply by 340 and by 100: 6 M x 340 x 100 = 204000 cm/s
• To convert 7 M to millimeters per minute, we multiply by 340 and by 1000, since there are 1000 millimeters in one meter, and multiply by 60, since there are 60 minutes in one hour: 7 M x 340 x 1000 x 60 = 142800000 mm/min
Mach speed can be marked as Ma and Mach number. At Standard Sea Level conditions (temperature of 15 degrees Celsius), the speed of sound = 1 Mach = 340.3 m/s (1225 km/h, or 761.2 mph, or 661.5 knots, or 1116 ft/s).

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