league (unit)

{{See also|Ancient Roman units of measurement}}

The league was used in Ancient Rome, defined as 1½ Roman miles (7,500 Roman feet, modern 2.2 km or 1.4 miles). The origin is the {{Lang|la|leuga Gallica}} (also: {{Lang|la|leuca Callica}}), the league of Gaul.The Oxford English Dictionary

The Argentine league ({{Lang|es|legua}}) is {{convert|5.572|km|mi|abbr=on|sigfig=4}} or 6,666 {{Lang|es|varas}}: 1 {{Lang|es|vara}} is {{convert|0.83|m|in|abbr=on}}.Espasa-Calpe Dictionary, Argentina and Mexico Edition 1945: headword Legua

{{see also|English units#Length}}

On land, the league is most commonly defined as three miles (4.83 km), although the length of a mile could vary from place to place as well as depending on the era. At sea, a league is {{convert|3|nmi|mi km|abbr=on|lk=in|sigfig=4|spell=in}}. English usage also included many of the other leagues mentioned below (for example, in discussing the Treaty of Tordesillas).{{fact|date=May 2023}}

{{See also|Units of measurement in France before the French Revolution}}

The French {{Lang|fr|lieue}} — at different times — existed in several variants, namely 10,000, 12,000, 13,200 and 14,400 French feet, about {{convert|3.25|to|4.68|km|abbr=in}}. It was used along with the metric system for a while, but is long discontinued.

A metric {{Lang|fr|lieue}} was used in France from 1812 to 1840, with 1 metric {{Lang|fr|lieue}} being exactly 4,000 m, or 4 km (about 2.5 mi).François Cardarelli: Scientific Unit Conversion (Springer-Verlag London, 1999) It is this unit that is referenced in both the title and the body text of Jules Verne's novel Twenty Thousand Leagues Under the Seas (1870).Jules Verne: Vingt mille lieues sous les mers (1871), Part 2, Chapter VII
"Aussi, notre vitesse fut-elle de vingt-cinq milles à l’heure, soit douze lieues de quatre kilomètres. Il va sans dire que Ned Land, à son grand ennui, dut renoncer à ses projets de fuite. Il ne pouvait se servir du canot entraîné à raison de douze à treize mètres par seconde. Quitter le Nautilus dans ces conditions, c’eût été sauter d’un train marchant avec cette rapidité, manœuvre imprudente s’il en fut."
"Accordingly, our speed was twenty–five miles (that is, twelve four–kilometre leagues) per hour. Needless to say, Ned Land had to give up his escape plans, much to his distress. Swept along at the rate of twelve to thirteen metres per second, he could hardly make use of the skiff. Leaving the Nautilus under these conditions would have been like jumping off a train racing at this speed, a rash move if there ever was one." Translated by F. P. Walter

In some rural parts of Mexico, the league (Spanish {{Lang|es|legua}}) is still used in the original sense of the distance that can be covered on foot in an hour, so that a league along a good road on level ground is a greater distance than a league on a difficult path over rough terrain.{{cite book|author=Rani T. Alexander|title=Yaxcabá and the Caste War of Yucatán: An Archaeological Perspective|url=https://books.google.com/books?id=YH4zh5GFFQYC&pg=PA165|year=2004|publisher=UNM Press|isbn=978-0-8263-2962-2|pages=165}}

=== Portugal ===

{{See also|Portuguese customary units}}

In Portugal, Brazil and other parts of the former Portuguese Empire, there were several units called league (Portuguese: légua):

• {{Lang|pt|Légua}} of 18 to a degree = 6,172.84 metres
• {{Lang|pt|Légua}} of 20 to a degree (Maritime légua) = 5,555.56 metres
• {{Lang|pt|Légua}} of 25 to a degree = 4,444.44 metres

The names of the several {{Lang|pt|léguas}} referred to the number of units that made the length corresponding to an angle degree of a meridian arc.

For compatibility after Portugal adopted the metric system, the metric {{Lang|pt|légua}} of 5.0 km was used.

In Brazil, the {{Lang|pt|léguas}} is still used occasionally, where it has been described as about 6.6 km.

{{See also|Spanish customary units}}

File:Fuente em Gredos.jpg, Spain indicating a distance of 9 leagues to the city of Ávila]]

The {{Lang|es|legua}} or Spanish league was originally understood as equivalent to {{nowrap|3 millas}} (Spanish miles).Spence, {{nowrap|E. Lee.}} Spence's Guide to Shipwreck Research, {{nowrap|p. 32.}} Narwhal Press (Charleston), 1997. This varied depending on local standards for the pie (Spanish foot) and on the precision of measurement, but was officially equivalent to {{nowrap|4,180 metres}} (2.6 miles) before the {{Lang|es|legua}} was abolished by Philip II in 1568. It remains in use in parts of Latin America, where its exact meaning varies.

• {{Lang|es|Legua nautica}} (nautical league): Between 1400 and 1600 the Spanish nautical league was equal to four Roman miles of 4,842 feet, making it 19,368 feet (5,903 metres or 3.1876 modern nautical miles). However, the accepted number of Spanish nautical leagues to a degree varied between 14 1/6 to 16 2/3, so in actual practice the length of a Spanish nautical league was 25,733 feet (4.235 modern nautical miles) to 21,874 feet (3.600 modern nautical miles) respectively.
• {{Lang|es|Legua de por grado}} (league of the degree): From the 15th century through the early 17th century, the Spanish league of the degree was based on four Arabic miles. Although most contemporary accounts used an Arabic mile of 6 444 feet (1,964 metres), which gave a Spanish league of the degree of 25,776 feet (7,857 metres or 4.242 modern nautical miles) others defined an Arabic mile as just 6,000 feet making a Spanish league of the degree 24,000 feet (or 7,315 metres, almost exactly 3.95 modern nautical miles).Spence's Guide to Shipwreck Research, by Dr. E. Lee Spence, Narwhal Press, Charleston/Miami, © by Edward L. Spence, 1997, p. 32
• {{Lang|es|Legua geographica}} or {{Lang|es|geográfica}} (geographical league): Starting around 1630 the Spanish geographical league was used as the official nautical measurement and continued so through the 1840s. Its use on Spanish charts did not become mandatory until 1718. It was four millias (miles) in length. From 1630 to 1718 a millia was 5,564 feet (1,696 metres), making a geographical league of four millias equal 22,256 feet (6,784 m or 3.663 modern nautical miles). But from 1718 through the 1830s the millia was defined as the equivalent of just over 5,210 feet, giving a shorter geographical league of just over 20,842 feet (6,353 m or 3.430 modern nautical miles).
• {{Lang|es|Legua marítima}} (maritime league): From around 1840 through the early 20th century, a Spanish marine league equaled 18,263.52 feet (5,566.72 metres or 3.00579 modern nautical miles).

In the early Hispanic settlements of New Mexico, Texas, California, and Colorado, a league was also a unit of area, defined as 25 million square varas or about 4,428.4 acres.{{cite web | url = http://www.ghostseekers.com/Conversions.htm | title = Land Measurement Conversion Guide | author = Vikki Gray | publisher = Vikki Gray | date = 1998-12-24 | access-date = 2007-06-04 | url-status=dead | archive-url = https://web.archive.org/web/20070608221644/http://www.ghostseekers.com/Conversions.htm | archive-date = 2007-06-08 }} This usage of league is referenced frequently in the Texas Constitution. So defined, a league of land would encompass a square that is one Spanish league on each side.

A comparison of the different lengths for a "league", in different countries and at different times in history, is given in the table below. Miles are also included in this list because of the linkage between the two units.

Similar units:

• 1,066.8 metres – verst, see also Obsolete Russian units of measurement
• 3,200 metres – kosh, used in North Bihar, India.

• Medieval weights and measures for various definitions of the league.
• List of obsolete units of measurement
• Portuguese customary units
• Spanish customary units
• Seven-league boots
• Walking
• Parasang

{{Reflist}}

{{clear}}

{{Imperial units}}

Category:Obsolete units of measurement

Category:Units of length

Category:Human-based units of measurement

Category:Imperial units

Category:Customary units of measurement in the United States