Feet Per Second to Miles Per Day
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1 foot per second (fps) = 16.3636364 mile per day (mi/day). Foot Per Second (fps) is a unit of Speed used in Standard system. Mile Per Day (mi/day) is a unit of Speed used in Standard system.

Feet per second: A unit of speed

Feet per second (ft/s) is a unit of speed or velocity in the US customary and imperial systems. It measures how fast an object is moving by calculating the distance traveled in feet divided by the time taken in seconds. For example, if a person walks 10 feet in 2 seconds, their speed is 5 ft/s.

How to convert feet per second

Feet 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 ft/s to m/s, multiply by 0.3048. To convert from m/s to ft/s, divide by 0.3048. For example, 1 ft/s is equal to 0.3048 m/s, and 10 m/s is equal to 32.8084 ft/s.
• Kilometers per hour (km/h): To convert from ft/s to km/h, multiply by 1.09728. To convert from km/h to ft/s, divide by 1.09728. For example, 1 ft/s is equal to 1.09728 km/h, and 50 km/h is equal to 45.8734 ft/s.
• Miles per hour (mph): To convert from ft/s to mph, multiply by 0.681818. To convert from mph to ft/s, divide by 0.681818. For example, 1 ft/s is equal to 0.681818 mph, and 30 mph is equal to 44 ft/s.
• Knots (kn): To convert from ft/s to kn, multiply by 0.592484. To convert from kn to ft/s, divide by 0.592484. For example, 1 ft/s is equal to 0.592484 kn, and 15 kn is equal to 25.3281 ft/s.
• Inches per second (in/s): To convert from ft/s to in/s, multiply by 12. To convert from in/s to ft/s, divide by 12. For example, 1 ft/s is equal to 12 in/s, and 20 in/s is equal to 1.66667 ft/s.
• Miles per second (mi/s): To convert from ft/s to mi/s, multiply by 0.000189394. To convert from mi/s to ft/s, divide by 0.000189394. For example, 1 ft/s is equal to 0.000189394 mi/s, and 1 mi/s is equal to 5280 ft/s.

Where feet per second are used

Feet per second are mainly used in engineering and aviation to measure the speed or velocity of machines and aircrafts.

For example, the speed of sound in air at sea level is about 343 m/s or about 1125 ft/s.

The maximum speed of a Boeing 747 jet airliner is about 988 km/h or about 2717 ft/s.

The average speed of a bullet fired from a handgun is about 1200 ft/s.

Definition of feet per second

According to the US customary and imperial systems definition, one foot per second is the speed of a body that covers a distance of one foot in a time of one second.

Mathematically, it can be expressed as:

v = s / t

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

History of feet 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 foot was originally derived from the Roman foot which was defined as one third of a yard or about 11.65 inches.

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 foot per second as a unit of speed or velocity.

The foot per second was officially adopted as part of the US customary and imperial systems in the late 18th century.

Example conversions of feet per second to other units

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

1 ft/s = 0.3048 m/s = 1.09728 km/h = 0.681818 mph = 0.592484 kn = 12 in/s = 0.000189394 mi/s
2 ft/s = 0.6096 m/s = 2.19456 km/h = 1.36364 mph = 1.18497 kn = 24 in/s = 0.000378788 mi/s
5 ft/s = 1.524 m/s = 5.4864 km/h = 3.40909 mph = 2.96241 kn = 60 in/s = 0.00094697 mi/s
10 ft/s = 3.048 m/s = 10.9728 km/h = 6.81818 mph = 5.92482 kn = 120 in/s = 0.00189394 mi/s
20 ft/s = 6.096 m/s = 21.9456 km/h = 13.6364 mph = 11.8496 kn = 240 in/s = 0.00378788 mi/s
50 ft/s = 15.24 m/s = 54.864 km/h = 34.0909 mph = 29.6241 kn = 600 in/s = 0.0094697 mi/s
100 ft/s = 30.48 m/s = 109.728 km/h = 68.1818 mph = 59.2482 kn = 1200 in/s = 0.0189394 mi/s

Miles Per Day

Definition of Miles Per Day

Miles per day (mi/d) is a unit of speed that measures how fast something is moving in terms of miles per unit of time. It is commonly used in the United States, the United Kingdom, and some other countries that use the US Standard system of measurement or have close historical ties with them. It is often 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.

One mile per day is equal to 0.0416666667 miles per hour, or 0.0185185185 meters per second. It can also be converted to other units of speed, such as kilometers per hour, feet per second, or knots, by using appropriate conversion factors.

How to Convert Miles Per Day

To convert miles per day to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert miles per day to kilometers per hour, we need to multiply by 1.609344, since there are 1.609344 kilometers in one mile. To convert miles per day to meters per second, we need to multiply by 0.018518518518519, since there are 0.018518518518519 meters in one mile.

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

• To convert 10 mi/d to kilometers per hour (km/h), we multiply by 1.609344: 10 mi/d x 1.609344 = 16.09344 km/h
• To convert 20 mi/d to feet per second (fps), we multiply by 0.05787037037037, since there are 0.05787037037037 feet in one meter: 20 mi/d x 0.05787037037037 = 1.157407407407 fps
• To convert 30 mi/d to knots (kn), we multiply by 0.03626111111, since there are 0.0362611111 nautical miles in one mile: 30 mi/d x 0.0362611111 = 1.08783333 kn
• To convert 40 mi/d to meters per second (m/s), we multiply by 0.018518518518519: 40 mi/d x 0.018518518518519 = 0.740740740741 m/s
• To convert 50 mi/d to meters per minute (m/min), we multiply by 1.11111, since there are 1.11111 minutes in one hour: 50 mi/d x 1.11111 = 55.555555556 m/min
• To convert 60 mi/d to centimeters per second (cm/s), we multiply by 100, since there are 100 centimeters in one meter, and multiply by 0.018518518518519: 60 mi/d x 100 x 0.018518518518519 = 111.11111 cm/s

Where Miles Per Day Are Used

Miles 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 miles per unit of time.

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

Miles 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 miles per unit of time.

History of Miles Per Day

The origin of miles per day as a unit of speed can be traced back to the development of the US Standard system and the mile as a unit of length in the late eighteenth century. The mile was defined as one thousand six hundred and nine meters (or eight furlongs) based on the English statute mile.

The term mile first appeared in English in the late fourteenth century, but it was not until later in the early nineteenth century that the use of miles per day became more common; before that, other units such as miles per hour or leagues per day were preferred for expressing speed.

Miles 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 Miles Per Day to Other Units

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

• To convert 100 mi/d to kilometers per hour, we multiply by 1.609344: 100 mi/d x 1.609344 = 160.9344 km/h
• To convert 200 mi/d to feet per second, we multiply by 0.05787037037037: 200 mi/d x 0.05787037037037 = 11.574074074074 fps
• To convert 300 mi/d to knots, we multiply by 0.0362611111: 300 mi/d x 0.0362611111 = 10.8783333 kn
• To convert 400 mi/d to meters per second, we multiply by 0.018518518518519: 400 mi/d x 0.018518518518519 = 7.407407407407 m/s
• To convert 500 mi/d to meters per minute, we multiply by 1.11111: 500 mi/d x 1.11111 = 555.55556 m/min
• To convert 600 mi/d to centimeters per second, we multiply by 100 and multiply by 0.018518518518519: 600 mi/d x 100 x 0.018518518518519 = 1111.1111 cm/s
• To convert 700 mi/d to millimeters per minute, we multiply by 1000, since there are 1000 millimeters in one meter, and multiply by 1.11111: 700 mi/d x 1000 x 1.11111 = 777777.77778 mm/min