furlongs (fur) to Kilometers (km) conversion

What is the furlong?

The furlong (fur) is a unit of length in the imperial and US customary systems, equal to one-eighth of a mile, most commonly used today in horse racing.

Definition

One furlong equals 660 feet, or 220 yards, or 40 rods, or 10 chains.

$$1\ \text{fur} = 201.168\ \text{m}$$

Eight furlongs make one statute mile. This value uses the international foot; the US survey furlong is larger by a factor of 1200/1199.

Origin and History

The name comes from Old English "furh" (furrow) and "lang" (long), meaning the length of a furrow in a ploughed open field. In the medieval English system, a furlong was the distance a team of oxen could plough before resting, standardized as the long side of a one-acre strip (one furlong by one chain). It became a fundamental unit of the English land-measurement system.

Law and Notable Facts

The furlong survives chiefly in horse racing, where race distances are quoted in furlongs (for example, a "six-furlong sprint"). It is also preserved in the definition of the acre and the mile. The whimsical furlong–firkin–fortnight (FFF) system uses it as an example of an intentionally impractical unit of length.

Real-World Examples and Conversions

• 1 furlong = 220 yd = 660 ft = 201.168 m.
• 8 furlongs = 1 statute mile.
• 1 furlong = 10 chains = 40 rods.
• The Kentucky Derby is run over 10 furlongs (1.25 miles).

What is the kilometer?

Kilometers are a commonly used unit for measuring distances. Here's some information about them.

Kilometer Defined

A kilometer (km) is a unit of length in the metric system, equal to 1000 meters. It is widely used around the world for measuring distances between geographical locations, lengths of roads, and athletic distances.

Origin and Formation

The metric system, from which the kilometer is derived, was created in France in the late 18th century. The meter was initially defined as one ten-millionth of the distance from the equator to the North Pole along a meridian. The prefix "kilo-" comes from the Greek word "chilioi," meaning thousand. Therefore, a kilometer is simply one thousand meters.

The relationship between kilometers and meters is:

$1 \text{ km} = 1000 \text{ m}$

Notable Associations

While no specific law or person is uniquely tied to the kilometer itself, the broader development of the metric system involved many scientists and mathematicians of the time. The standardization and adoption of the metric system significantly aided scientific progress and international trade.

Real-World Examples

• Distances between Cities: The distance between New York and Los Angeles is approximately 3,944 kilometers.

• Road Lengths: Highway systems and major roads are often measured and marked in kilometers. The Pan-American Highway, for instance, stretches over 30,000 kilometers.

• Athletic Events: Long-distance running races often involve distances measured in kilometers, such as 5k (5 kilometers), 10k (10 kilometers), and marathons (approximately 42.2 kilometers).

• Geographic Features: The length of rivers, mountain ranges, and other geographical features are commonly described in kilometers. For example, The length of Nile river is approximately 6,650 kilometers.

• Altitude: While altitude is often measured in meters, higher altitudes such as the height of commercial airliners can be specified in kilometers. Commercial airlines usually fly between 9 to 13 kilometers.

Conversions to Other Units

• To miles: $1 \text{ km} \approx 0.621371 \text{ miles}$

• To feet: $1 \text{ km} \approx 3280.84 \text{ feet}$

• To inches: $1 \text{ km} \approx 39370.1 \text{ inches}$