Furlongs Per Fortnight to Miles Per Hour (fur/ftn to mph)
1 furlong per fortnight equals 0.0003720238095 miles per hour (rounded).
How to convert furlongs per fortnight to miles per hour
To convert furlongs per fortnight to miles per hour, multiply the number of furlongs per fortnight by 0.0003720238095. The factor is rounded to 10 significant digits. To go the other way, multiply miles per hour by 2,688.
miles per hour = furlongs per fortnight × 0.0003720238095
Example: 10 furlongs per fortnight = 0.003720238095 miles per hour.
About these units
Furlong Per Fortnight (fur/ftn)
About 0.000166 m/s. A joke unit made of two archaic units, a standard classroom example of a deliberately absurd speed.
Furlong per fortnight is a deliberately silly speed, made from two obsolete English units. Furlong combines Old English words for furrow and long, the distance a team of oxen could plough without resting, and it is now fixed at 201.168 m. Fortnight descends from Old English for fourteen nights and equals 1,209,600 seconds.
Dividing one by the other gives about 1.663 x 10^-4 m/s, or 0.1663 mm/s. That is nearly 1 cm/min and roughly the speed of the tip of a short minute hand. The unit belongs to the humorous FFF system and turns up in classroom examples of dimensional analysis. In it, the speed of light is about 1.8026 x 10^12 furlongs per fortnight, which checks against 299,792,458 divided by 1.663 x 10^-4.
1 furlong per fortnight = 0.0001663095238 meters per second (approximately).
Sources: Wikipedia: FFF system (furlong per fortnight); Wikipedia: Furlong; Wikipedia: Fortnight
Mile Per Hour (mph)
Exactly 0.44704 m/s. The unit for road speeds in the US, UK and a few other countries.
Early British motoring law is the best window into this unit. The 1861 Locomotive Act set a limit of 10 mph for light locomotives. The 1865 Red Flag Act cut it to 4 mph in the country and 2 mph in towns, with a person walking ahead with a flag. The Locomotives on Highways Act of 1896 raised it to 14 mph, and the Motor Car Act of 1903 to 20 mph. In 1931 all limits for cars were abolished, and 30 mph in built-up areas returned in 1935.
The mile per hour combines the mile, set at 5,280 feet in Elizabeth I's reign, with the hour, and it equals exactly 0.44704 m/s or 1.609344 km/h. The United Kingdom and United States use it on roads, along with several smaller countries, mostly territories or former territories of those two, and the US, Canada and Ireland use it for rail. Sports such as cricket, tennis and baseball quote ball speeds in it. Aviation and shipping prefer knots, about 0.869 of one mph each.
1 mile per hour = 0.44704 meters per second (exactly).
Sources: Wikipedia: Miles per hour; Wikipedia: Speed limits in the United Kingdom; Wikipedia: Mile
Related conversions
- Miles per hour to furlongs per fortnight (reverse)
- Furlongs per fortnight to meters per second
- Furlongs per fortnight to kilometers per hour
- Furlongs per fortnight to knots
- Meters per second to miles per hour
- Kilometers per hour to miles per hour
- Knots to miles per hour
- Feet per second to miles per hour
- Mach to miles per hour
- Speed of light to miles per hour
- Centimeters per second to miles per hour
- Millimeters per second to miles per hour
- Kilometers per second to miles per hour
- Kilometers per minute to miles per hour
- Meters per minute to miles per hour
- Inches per second to miles per hour
See all speed units.