Mile

Unit of length

Several terms redirect here. For other uses, see Scandinavian mile, nautical mile, Mile (disambiguation), and Miles (disambiguation).

Mile

A milestone in the City of Westminster showing the distance from Kensington Road to Hounslow and Hyde Park Corner in miles

General information
Unit system| British imperial/US customary
Unit of| length
Symbol| mi. or mi, (rarely) m
Conversions
1 mi. or mi in ...| ... is equal to ...
SI units|  1609.344 m
imperial/US units|

* 63360 in
* 5280 ft
* 1760 yd
* 80 ch
* 8 fur

US survey mile|  0.999998 survey mile
nautical units|  ≈ 0.86898 nmi[n 1]

The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised between the Commonwealth of Nations and the United States by an international agreement in 1959, when it was formally redefined with respect to SI units as exactly 1,609.344 metres.

With qualifiers, mile is also used to describe or translate a wide range of units derived from or roughly equivalent to the Roman mile (roughly 1.48 km), such as the nautical mile (now 1.852 km exactly), the Italian mile (roughly 1.852 km), and the Chinese mile (now 500 m exactly). The Romans divided their mile into 5,000 pedes (lit. 'feet'), but the greater importance of furlongs in the Elizabethan-era England meant that the statute mile was made equivalent to 8 furlongs or 5,280 feet in 1593. This form of the mile then spread across the British Empire, some successor states of which continue to employ the mile. The US Geological Survey now employs the metre for official purposes, but legacy data from its 1927 geodetic datum has meant that a separate US survey mile (⁠6336/3937⁠ km) continues to see some use, although it was officially phased out in 2022. While most countries replaced the mile with the kilometre when switching to the International System of Units (SI), the international mile continues to be used in some countries, such as the United Kingdom, the United States, and a number of countries with fewer than one million inhabitants, most of which are UK or US territories or have close historical ties with the UK or US.

## Name

[edit]

The modern English word mile derives from Middle English myle and Old English mīl, which was cognate with all other Germanic terms for miles. These derived from the nominal ellipsis form of mīlle passus 'mile' or mīlia passuum 'miles', the Roman mile of one thousand paces.[1]

The present international mile is usually what is understood by the unqualified term mile. When this distance needs to be distinguished from the nautical mile, the international mile may also be described as a land mile or statute mile.[2] In British English, statute mile may refer to the present international mile or to any other form of English mile since the 1593 Act of Parliament, which set it as a distance of 1,760 yards. Under American law, however, statute mile refers to the US survey mile.[3] Foreign and historical units translated into English as miles usually employ a qualifier to describe the kind of mile being used but this may be omitted if it is obvious from the context, such as a discussion of the 2nd-century Antonine Itinerary describing its distances in terms of miles rather than Roman miles.

### Abbreviation

[edit]

The mile has been variously abbreviated in English—with and without a trailing period—as "mi", "M", "ml", and "m".[4] The American National Institute of Standards and Technology now uses and recommends "mi" to avoid confusion with the SI metre (m) and millilitre (ml).[5] However, derived units such as miles per hour or miles per gallon continue to be abbreviated as "mph" and "mpg" rather than "mi/h" and "mi/gal". In the United Kingdom, road signs use "m" as the abbreviation for mile though height and width restrictions also use "m" as the symbol for the metre, which may be displayed alongside feet and inches.[6] The BBC style holds that "there is no acceptable abbreviation for 'miles'" and so it should be spelled out when used in describing areas.[7]

## Historical

[edit]

The supposed remains of the Golden Milestone, the zero-mile marker of the Roman road network, in the Roman Forum

### Roman

[edit]

The Roman mile (mille passus, lit. "thousand paces"; abbr. m.p.; also milia passuum[n 2] and mille) consisted of a thousand paces as measured by every other step—as in the total distance of the left foot hitting the ground 1,000 times.[9] When Roman legionaries were well-fed and harshly driven in good weather, they thus created longer miles. The distance was indirectly standardised by Agrippa's establishment of a standard Roman foot (Agrippa's own) in 29 BC,[10] and the definition of a pace as 5 feet. An Imperial Roman mile thus denoted 5,000 Roman feet. Surveyors and specialised equipment such as the decempeda and dioptra then spread its use.[11]

In modern times, Agrippa's Imperial Roman mile was empirically estimated to have been about 1,618 yards (1,479 m; 4,854 ft; 0.919 mi) in length, slightly less than the 1,760 yards (1,609 m; 5,280 ft) of the modern international mile.[12]

In Hellenic areas of the Empire, the Roman mile (Ancient Greek: μίλιον, mílion) was used beside the native Greek units as equivalent to 8 stadia of 600 Greek feet. The mílion continued to be used as a Byzantine unit and was also used as the name of the zero mile marker for the Byzantine Empire, the Milion, located at the head of the Mese near Hagia Sophia.

The Roman mile spread throughout Europe, with its local variations giving rise to the different units.[citation needed] Also arising from the Roman mile is the milestone. All roads radiated out from the Roman Forum throughout the Empire – 50,000 (Roman) miles of stone-paved roads. At every mile was placed a shaped stone. Originally, these were obelisks made from granite, marble, or whatever local stone was available. On these was carved a Roman numeral, indicating the number of miles from the centre of Rome – the Forum. Hence, one can know how far one is from Rome.[13]

### Ptolemaic mile

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In the 2nd-century, Greco-Roman polymath, Claudius Ptolemy, of Alexandria (Egypt), in his Almagest and Geography, defined a mile as a geographic arcminute of longitude, of the earth's circumference, equivalent to 1:60 of a degree of longitude, or 1:21,600 of the circumference.[14] While his estimate of the circumference of the earth, and therefore the derived length of a stade, and a mile, from third party observations, principally offered in non-normalised stadion (600 Greek feet), Egyptian schoinos, and Persian parasang were erroneous.[clarification needed] Ptolomy's assumptions of a customary stade to be ⁠1/8⁠ of a Roman mile, ⁠1/30⁠ of a schoinos or parasang, ⁠1/500⁠ of an arc-minute, or ~185 metres,[15][16] his Geographical mile, is the basis of the current nautical mile, and was adopted by medieval Arab and European cartographers.[17][18]

### Italian

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The Italian mile (miglio, pl. miglia) was traditionally considered a direct continuation of the Roman mile, equal to 1000 paces,[19] although its actual value over time or between regions could vary greatly.[20] It was often used in international contexts from the Middle Ages into the 17th century[19] and is thus also known as the "geographical mile",[21] although the geographical mile is now a separate standard unit.

### Arabic

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Main article: Arabic mile

The Arabic mile (الميل, al-mīl), of 4,000 cubits, was not the common Arabic unit of length; instead, Arabs and Persians traditionally used the longer parasang or "Arabic league". Although the precise length of the Arabic mile remains disputed, due to the variability in cubit length, it was somewhere between 1.8 and 2.0 km. The Arabic mile being approximate to a 1.852 km nautical or geographical mile, and an approximation of 1 arcminute of latitude measured directly north-and-south along a meridian. The mile was used by medieval Arab geographers and scientists.

### English

[edit]

See also: yard

The "old English mile" of the medieval and early modern periods varied but seems to have measured about 1.3 international miles (2.1 km).[22][23] The old English mile varied over time and location within England.[23] The old English mile has also been defined as 79,200 or 79,320 inches (1.25 or 1.2519 statute miles).[24] The English long continued the Roman computations of the mile as 5,000 feet, 1,000 paces, or 8 longer divisions, which they equated with their "furrow's length" or furlong.[25]

The origins of English units are "extremely vague and uncertain",[26] but seem to have been a combination of the Roman system with native British and Germanic systems both derived from multiples of the barleycorn.[n 3] Probably by the reign of Edgar in the 10th century, the nominal prototype physical standard of English length was an arm-length iron bar (a yardstick) held by the king at Winchester;[27][26] the foot was then one-third of its length. Henry I was said to have made a new standard in 1101 based on his own arm.[26] Following the issuance of Magna Carta in 1215, the barons of Parliament directed John and his son to keep the king's standard measure (Mensura Domini Regis) and weight at the Exchequer,[26] which thereafter verified local standards until its abolition in the 19th century. New brass standards are known to have been constructed under Henry VII and Elizabeth I.[29]

Arnold's c. 1500 Customs of London recorded a mile shorter than previous ones, coming to 0.947 international miles (5,000 feet) or 1.524 km.[25]

#### Statute

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"Statute mile" redirects here. For the current statute mile in the United Kingdom, see § International. For the statute mile in the United States, see § US survey.

The English statute mile was established by a Weights and Measures Act of Parliament in 1593 during the reign of Queen Elizabeth I. The act on the Composition of Yards and Perches had shortened the length of the foot and its associated measures, causing the two methods of determining the mile to diverge.[30] Owing to the importance of the surveyor's rod in deeds and surveying undertaken under Henry VIII,[31] decreasing the length of the rod by 1⁄11 would have amounted to a significant tax increase. Parliament instead opted to maintain the mile of 8 furlongs (which were derived from the rod) and to increase the number of feet per mile from the old Roman value.[32] The applicable passage of the statute reads: "A Mile shall contain eight Furlongs, every Furlong forty Poles,[n 4] and every Pole shall contain sixteen Foot and an half."[34] The statute mile therefore contained 5,280 feet or 1,760 yards.[25] The distance was not uniformly adopted. Robert Morden had multiple scales on his 17th-century maps which included continuing local values: his map of Hampshire, for example, bore two different "miles" with a ratio of 1 : 1.23[35] and his map of Dorset had three scales with a ratio of 1 : 1.23 : 1.41.[36] In both cases, the traditional local units remained longer than the statute mile. The English statute mile was superseded in 1959 by the international mile by international agreement.

### Welsh

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The Welsh mile (milltir or milldir) was 3 statute miles and 1,470 yards long (6.17 km). It comprised 9,000 paces (cam), each of 3 Welsh feet (troedfedd) of 9 inches (modfeddi).[37] (The Welsh inch is usually reckoned as equivalent to the English inch.) Along with other Welsh units, it was said to have been codified under Dyfnwal the Bald and Silent and retained unchanged by Hywel the Good.[38] Along with other Welsh units, it was discontinued following the conquest of Wales by Edward I of England in the 13th century.

### Scots

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Edinburgh's "Royal Mile"—running from the castle to Holyrood Abbey—is roughly a Scots mile long.[39]

The Scots mile was longer than the English mile,[40] as mentioned by Robert Burns in the first verse of his poem "Tam o' Shanter". It comprised 8 (Scots) furlongs divided into 320 falls or faws (Scots rods).[41] It varied from place to place but the most accepted equivalencies are 1,976 Imperial yards (1.123 statute miles or 1.81 km). It was legally abolished three times: first by a 1685 act of the Scottish Parliament,[42] again by the 1707 Treaty of Union with England,[43] and finally by the Weights and Measures Act 1824.[40] It had continued in use as a customary unit through the 18th century but had become obsolete by its final abolition.

### Irish

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Main article: Irish mile

Milestone on Mountbellew Bridge, erected c. 1760. Distances are given in Irish miles.

The Irish mile (míle or míle Gaelach) measured 2,240 yards: approximately 1.27 statute miles or 2.048 kilometres.[44][45] It was used in Ireland from the 16th century plantations until the 19th century, with residual use into the 20th century. The units were based on "English measure" but used a linear perch measuring 7 yards (6.4 m) as opposed to the English rod of 5.5 yards (5.0 m).[45]

### Danish

[edit]

Following its standardisation by Ole Rømer in the late 17th century, the Danish mile (mil) was precisely equal to the Prussian mile and likewise divided into 24,000 feet.[46] These were sometimes treated as equivalent to 7.5 km. Earlier values had varied: the Sjællandske miil, for instance, had been 11.13 km.

### Dutch

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Scalebar on a 16th-century map made by Mercator. The scalebar is expressed in "Hours walking or common Flemish miles", and includes three actual scales: small, medium and big Flemish miles.

The Dutch mile (mijl) has had different definitions throughout history. One of the older definitions was 5,600 ells. But the length of an ell was not standardised, so that the length of a mile could range between 3,280 m and 4,280 m. In the sixteenth century, the Dutch had three different miles: small (kleine), medium (middelbaar/gemeen), and large (groote). The Dutch kleine mile had the historical definition of one hour's walking (uur gaans), which was defined as 24 stadia, 3000 paces, or 15,000 Amsterdam or Rhineland feet (respectively 4,250 m or 4,710 m). The common Dutch mile was 32 stadia, 4,000 paces, or 20,000 feet (5,660 m or 6,280 m). The large mile was defined as 5000 paces.[47] The common Dutch mile was preferred by mariners, equating with 15 to one degree of latitude or one degree of longitude on the equator. This was originally based upon Ptolemy's underestimate of the Earth's circumference. The ratio of 15 Dutch miles to a degree remained fixed while the length of the mile was changed as with improved calculations of the circumference of the Earth. In 1617, Willebrord Snellius calculated a degree of the circumference of the Earth at 28,500 Rijnlantsche Roeden (within 3.5% of the actual value), which resulted in a Dutch mile of 1900 rods.[48] By the mid-seventeenth century, map scales assigned 2000 rods to the common Dutch mile, which equalled around 7,535 m (reducing the discrepancy with latitude measurement to less than 2%). The metric system was introduced in the Netherlands in 1816, and the metric mile became a synonym for the kilometre, being exactly 1,000 m. Since 1870, the term mijl was replaced by the equivalent kilometer. Today, the word mijl is no longer used, except as part of certain proverbs and compound terms like mijlenver ("miles away").

### German

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Various historic miles and leagues from an 1848 German textbook, given in feet, metres, and fractions of a "degree of meridian"

The German mile (Meile) was 24,000 German feet. The standardised Austrian mile used in southern Germany and the Austrian Empire was 7.586 km; the Prussian mile used in northern Germany was 7.5325 km. The Germans also used a longer version of the geographical mile.

### Breslau

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The Breslau mile, used in Breslau, and from 1630 officially in all of Silesia, equal to 11,250 ells, or about 6,700 meters. The mile equaled the distance from the Piaskowa Gate all the way to Psie Pole (Hundsfeld). By rolling a circle with a radius of 5 ells through Piaskowa Island, Ostrów Tumski and suburban tracts, passing eight bridges on the way, the standard Breslau mile was determined.[49][50]

### Saxon

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The Saxon post mile (kursächsische Postmeile or Polizeimeile, introduced on occasion of a survey of the Saxon roads in the 1700s, corresponded to 2,000 Dresden rods, equivalent to 9.062 kilometres.[51]

### Hungarian

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The Hungarian mile (mérföld or magyar mérföld) varied from 8.3790 km to 8.9374 km before being standardised as 8.3536 km.

### Portuguese

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The Portuguese mile (milha) used in Portugal and Brazil was 2.0873 km prior to metrication.[52]

### Russian

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The Russian mile (миля or русская миля, russkaya milya) was 7.468 km, divided into 7 versts.

### Croatian

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The Croatian mile (hrvatska milja), first devised by the Jesuit Stjepan Glavač on a 1673 map, is the length of an arc of the equator subtended by ⁠1/10⁠° or 11.13 km exactly.[53][54] The previous Croatian mile, now known as the "ban mile" (banska milja), had been the Austrian mile given above.[55]

### Ottoman

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The Ottoman mile was 1,894.35 m, which was equal to 5,000 Ottoman foot. After 1933, the Ottoman mile was replaced with the modern Turkish mile (1,853.181 m).

### Japanese

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The CJK Compatibility Unicode block contains square-format versions of Japanese names for measurement units as written in katakana script. Among them, there is U+3344 ㍄ SQUARE MAIRU, after マイル mairu.

## International

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The international mile is precisely equal to 1.609344 km (or ⁠25146/15625⁠ km as a fraction).[57] It was established as part of the 1959 international yard and pound agreement reached by the United States, the United Kingdom, Canada, Australia, New Zealand, and the Union of South Africa,[58] which resolved small but measurable differences that had arisen from separate physical standards each country had maintained for the yard.[59] As with the earlier statute mile, it continues to comprise 1,760 yards or 5,280 feet.

The difference from the previous standards was 2 ppm, or about 3.2 millimetres (1⁄8 inch) per mile. The US standard was slightly longer and the old Imperial standards had been slightly shorter than the international mile. When the international mile was introduced in English-speaking countries, the basic geodetic datum in America was the North American Datum of 1927 (NAD27). This had been constructed by triangulation based on the definition of the foot in the Mendenhall Order of 1893, with 1 foot = ⁠1200/3937⁠ (≈0.304800609601) metres and the definition was retained for data derived from NAD27, but renamed the US survey foot to distinguish it from the international foot.[60][n 5] Thus a survey mile = ⁠1200/3937⁠ × 5280 (≈1609.347218694) metres. An international mile = 1609.344 / (⁠1200/3937⁠ × 5280) (=0.999998) survey miles.

The exact length of the land mile varied slightly among English-speaking countries until the international yard and pound agreement in 1959 established the yard as exactly 0.9144 metres, giving a mile of exactly 1,609.344 metres. The US adopted this international mile for most purposes, but retained the pre-1959 mile for some land-survey data, terming it the U. S. survey mile. In the United States, statute mile normally refers to the survey mile,[61] about 3.219 mm (1⁄8 inch) longer than the international mile (the international mile is exactly 0.0002% less than the US survey mile).

While many countries abandoned the mile when switching to the metric system, the international mile continues to be used in some countries, such as Liberia, Myanmar,[62] the United Kingdom[63] and the United States.[64] It is also used in a number of territories with less than a million inhabitants, most of which are UK or US territories, or have close historical ties with the UK or US: American Samoa,[65] Bahamas,[66] Belize,[67] British Virgin Islands,[68] Cayman Islands,[69] Dominica,[69] Falkland Islands,[70] Grenada,[71] Guam,[72] The N. Mariana Islands,[73] Samoa,[74] St. Lucia,[75] St. Vincent & The Grenadines,[76] St. Helena,[77] St. Kitts & Nevis,[78] the Turks & Caicos Islands,[79] and the US Virgin Islands.[80] The mile is even encountered in Canada, though this is predominantly in rail transport and horse racing, as the roadways have been metricated since 1977.[81][82][83][84] Ireland gradually replaced miles with kilometres, including in speed measurements; the process was completed in 2005.

## US survey

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For the detailed calculations of international miles to survey miles and feet (above), see § International.

The US survey mile is 5,280 US survey feet, or 1,609.347 metres and 0.30480061 metres respectively.[85] Both are very slightly longer than the international mile and international foot. In the United States, the term statute mile formally refers to the survey mile,[3] but for most purposes, the difference of less than 1⁄8 inch (3.2 mm) between the survey mile and the international mile (1609.344 metres exactly) is insignificant—one international mile is 0.999998 US survey miles—so statute mile can be used for either. But in some cases, such as in the US State Plane Coordinate Systems (SPCSs), which can stretch over hundreds of miles,[86] the accumulated difference can be significant, so it is important to note that the reference is to the US survey mile.

The United States redefined its yard in 1893, and this resulted in US and Imperial measures of distance having very slightly different lengths.

The North American Datum of 1983 (NAD83), which replaced the NAD27, is defined in metres. State Plane Coordinate Systems were then updated, but the National Geodetic Survey left individual states to decide which (if any) definition of the foot they would use. All State Plane Coordinate Systems are defined in metres, and 42 of the 50 states only use the metre-based State Plane Coordinate Systems. However, eight states also have State Plane Coordinate Systems defined in feet, seven of them in US survey feet and one in international feet.[86]

State legislation in the US is important for determining which conversion factor from the metric datum is to be used for land surveying and real estate transactions, even though the difference (2 ppm) is hardly significant, given the precision of normal surveying measurements over short distances (usually much less than a mile). Twenty-four states have legislated that surveying measures be based on the US survey foot, eight have legislated that they be based on the international foot, and eighteen have not specified which conversion factor to use.[86]

SPCS 83 legislation refers to state legislation that has been passed or updated using the newer 1983 NAD data. Most states have done so. Two states, Alaska and Missouri, and two jurisdictions, Guam and Puerto Rico, do not specify which foot to use.[86] Two states, Alabama and Hawaii, and four jurisdictions, Washington, DC, US Virgin Islands, American Samoa and Northern Mariana Islands, do not have SPCS 83 legislation.[86]

In October 2019, US National Geodetic Survey and National Institute of Standards and Technology announced their joint intent to retire the US survey foot and US survey mile, as permitted by their 1959 decision, with effect on January 1, 2023.[87][88][89]

## Nautical

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On the utility of the nautical mile.
Each circle shown is a great circle—the analogue of a line in spherical trigonometry—and hence the shortest path connecting two points on the globular surface. Meridians are great circles that pass through the poles.

Main article: Nautical mile

The nautical mile was originally defined as one minute of arc along a meridian of the Earth.[90] Navigators use dividers to step off the distance between two points on the navigational chart, then place the open dividers against the minutes-of-latitude scale at the edge of the chart, and read off the distance in nautical miles.[91] The Earth is not perfectly spherical but an oblate spheroid, so the length of a minute of latitude increases by 1% from the equator to the poles, as seen for example in the WGS84 ellipsoid, with 1,843 metres (6,046 ft) at the equator, 1,862 metres (6,108 ft) at the poles and average 1,852 metres (6,076 ft).

Since 1929 the international nautical mile is defined by the First International Extraordinary Hydrographic Conference in Monaco as exactly 1,852 metres (which is 1.151 miles or 6,076.12 feet).[92] In the United States, the nautical mile was defined in the 19th century as 6,080.2 feet (1,853.24 m), whereas in the United Kingdom, the Admiralty nautical mile was defined as 6,080 feet (1,853.18 m) and was about one minute of latitude in the latitudes of the south of the UK. Other nations had different definitions of the nautical mile.

### Related units

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The nautical mile per hour is known as the knot. Nautical miles and knots are almost universally used for aeronautical and maritime navigation, because of their relationship with degrees and minutes of latitude and the convenience of using the latitude scale on a map for distance measuring.

The data mile is used in radar-related subjects and is equal to 6,000 feet (1.8288 kilometres).[93] The radar mile is a unit of time (in the same way that the light year is a unit of distance), equal to the time required for a radar pulse to travel a distance of two miles (one mile each way). Thus, the radar statute mile is 10.8 μs and the radar nautical mile is 12.4 μs.[94]

## Geographical

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Main article: Geographical mile

The geographical mile is based upon the length of a meridian of latitude. The German geographical mile (geographische Meile) was previously 1⁄15° of latitude (7.4127 km).[95]

## Metric

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Main article: Metric mile

The informal term "metric mile" is used in some countries, in sports such as track and field athletics and speed skating, to denote a distance of 1,500 metres (0.932 miles). The 1500 meters is the premier middle distance running event in Olympic sports. In United States high-school competition, the term is sometimes used for a race of 1,600 metres (0.994 miles).[96]

## Scandinavian

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Main article: Scandinavian mile

The Scandinavian mile (mil) remains in common use in Norway and Sweden, where it has meant precisely 10 km since metrication in 1889.[46] It is used in informal situations and in measurements of fuel consumption, which are often given as litres per mil. In formal situations (such as official road signs) only kilometres are given.

The Swedish mile was standardised as 36,000 Swedish feet or 10.6884 kilometres (6.6415 miles) in 1649; before that it varied by province from about 6 to 14.485 km.[46]

Before metrication, the Norwegian mile was 11.298 kilometres (7.020 miles).

The traditional Finnish peninkulma was translated as Swedish: mil and also set equal to 10 km during metrication in 1887, but is much less commonly used.

## Comparison table

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A comparison of the different lengths for a "mile", in different countries and at different times in history, is given in the table below. Leagues are also included in this list because, in terms of length, they fall in between the short West European miles and the long North, Central and Eastern European miles.

Length (m) | Name | Country used | From | To | Definition | Remarks

|
|
|
|
|
|

0500 | lǐ | mainland China | 1984 | today | 1,500 chi | In Chinese, this unit and the imperial mile are written using the same word (里), with a qualifier to distinguish between systems if needed
0960–1,152 | Talmudic mil | Land of Israel/Canaan |  | today | 2,000 amot (cubits) | Biblical and Talmudic units of measurement
01,480 | mille passus, milliarium | Roman Empire |  |  |  | Ancient Roman units of measurement
01,486.6 | miglio[97] | Sicily |  |  |  |
01,524 | London mile | England |  |  |  |
01,609.3426 | (statute) mile | England/UK | 1592 | 1959 | 1,760 yards | Over the course of time, the length of a yard changed several times and consequently so did the English, and from 1824, the imperial mile. The statute mile was introduced in 1592 during the reign of Queen Elizabeth I
01,609.344 | mile | some English speaking countries[citation needed] | 1959 | today | 1,760 yards | On 1 July 1959, the imperial mile was standardized to an exact length in metres. This figure corresponds to 5280 feet at 25.4 millimeters per inch.
01,609.3472 | (statute) mile | United States | 1893 | 2022 | 1,760 yards | From 1959 also called the US Survey Mile. From then, its only utility has been land survey, before it was the standard mile. From 1893, its exact length in metres was: ⁠3600/3937⁠ × 1760
01,807 | Scots mile | Scotland |  | 1685 | 5,920 feet |
01,820 |  | Italy |  |  |  |
01,852 | nautical mile | international |  | today | approx. 1 minute of arc | Measured at a circumference of 40,000 km. Abbreviation: NM, nm
01,852.3 | (for comparison) |  |  |  | 1 meridian minute |
01,853.181 | nautical mile | Turkey |  |  |  |
01,855.4 | (for comparison) |  |  |  | 1 equatorial minute | Although the NM was defined on the basis of the minute, it varies from the equatorial minute, because at that time the circumference of the equator could only be estimated at 40,000 km.
02,065 |  | Portugal |  |  |  |
02,220 | Gallo-Roman league | Gallo-Roman culture |  |  | 1.5 miles | Under the reign of Emperor Septimius Severus, this replaced the Roman mile as the official unit of distance in the Gallic and Germanic provinces, although there were regional and temporal variations.[98]
02,470 |  | Sardinia, Piemont |  |  |  |
02,622 |  | Scotland |  |  |  |
02,880 |  | Ireland |  |  |  |
03,780 |  | Flanders |  |  |  |
03,898 | French lieue (post league) | France |  |  | 2,000 "body lengths" |
03,927 | Ri | Japan |  |  | 12,960 shaku |
04,000 | general or metric league |  |  |  |  |
04,000 | legue | Guatemala |  |  |
04,190 | legue | Mexico[99] |  |  | = 2,500 tresas = 5,000 varas |
04,444.8 | landleuge |  |  |  | 1⁄25° of a circle of longitude |
04,452.2 | lieue commune | France |  |  |  | Units of measurement in France before the French Revolution
04,513 | legue | Paraguay |  |  |  |
04,513 | legua | Chile,[99] (Guatemala, Haiti) |  |  | = 36 cuadros = 5,400 varas |
04,808 |  | Switzerland |  |  |  |
04,828 | English land league | England |  |  | 3 miles |
04,800
04,900 | Germanic rasta, also doppelleuge
(double league) |  |  |  |  |
05,000  | légua nova  | Portugal[99] |  |  |  |
05,196 | legua | Bolivia[99] |  |  | = 40 ladres |
05,152 | legua Argentina | Argentina, Buenos Aires[99] |  |  | = 6,000 varas |
05,154 | legue | Uruguay |  |  |  |
05,200 | Bolivian legua | Bolivia |  |  |  |
05,370 | legue | Venezuela |  |  |  |
05,500 | Portuguese legua | Portugal |  |  |  |
05,510 | legue | Ecuador |  |  |  |
05,510 | Ecuadorian legua | Ecuador |  |  |  |
05,532.5 | Landleuge
(state league) | Prussia |  |  |  | Obsolete German units of measurement
05,540 | legue | Honduras |  |  |  |
05,556 | Seeleuge (nautical league) |  |  |  | 1⁄20° of a circle of longitude
3 nautical miles |
05,570 | legua | Spain and Chile |  |  |  | Spanish customary units
05,572 | legua | Colombia[99] |  |  | = 3 Millas |
05,572.7 | legue | Peru[99] |  |  | = 20,000 feet
05,572.7 | legua Antigua
old league | Spain[99] |  |  | = 3 millas = 15,000 feet |
05,590  | légua  | Brazil[99] |  |  | = 5,000 varas = 2,500 bracas |
05,600 | Brazilian legua | Brazil |  |  |  |
05,685 | Fersah (Turkish league) | Ottoman Empire |  | 1933 | 4 Turkish miles | Derived from Persian parasang
05,840[100] | Dutch mile | Holland |  |  |  |
06,170 | milltir | Wales |  | 13thC | 9,000 camau ( = 27,000 troedfeddi = 243,000 inches) | Eclipsed by the conquest of Wales by Edward I
06,197  | légua antiga  | Portugal[99] |  |  | = 3 milhas = 24 estadios |
06,240 | Persian legue | Persia |  |  |  |
06,277 |  | Luxembourg |  |  |  |
06,280 |  | Belgium |  |  |  |
06,687.24 | legua nueva
new league, since 1766 | Spain[99] |  |  | = 8,000 varas |
06,700  | Breslau mile  | Silesia  | 1630  | 1872  |  | Also known as mila wrocławska in Polish
06,797 | Landvermessermeile
(state survey mile) | Saxony |  |  |  | Obsolete German units of measurement
07,400 |  | Netherlands |  |  |  |
07,409 | (for comparison) |  |  |  | 4 meridian minutes |
07,419.2 |  | Kingdom of Hanover |  |  |  | Obsolete German units of measurement
07,419.4 |  | Duchy of Brunswick |  |  |  | Obsolete German units of measurement
07,420.4
07,414.9 |  | Bavaria |  |  |  | Obsolete German units of measurement
07,420.439 | geographic mile |  |  |  | 1⁄15 equatorial grads [dubious - discuss] |
07,421.6 | (for comparison) |  |  |  | 4 equatorial minutes |
07,448.7 |  | Württemberg |  |  |  | Obsolete German units of measurement
07,450 |  | Hohenzollern |  |  |  | Obsolete German units of measurement
07,467.6 |  | Russia |  |  | 7 verst | Obsolete Russian units of measurement
07,480 |  | Bohemia |  |  |  |
07,500 | kleine / neue Postmeile
(small/new postal mile) | Saxony |  | 1840 |  | German Empire, North German Confederation, Grand Duchy of Hesse, Russia. Obsolete German units of measurement
07,532.5 | Land(es)meile
(German state mile) | Denmark, Hamburg, Prussia |  |  |  | Primarily for Denmark defined by Ole Rømer. Obsolete German units of measurement
07,585.9 | Postmeile
(post mile) | Austro-Hungary |  |  |  | Austrian units of measurement
07,850 | Milă | Romania |  |  |  |
08,534.31  | Mila  | Poland  | 1819  |  |  | 7146 meters before 1819, also equaled 7 verst[101]
08,800 |  | Schleswig-Holstein |  |  |  | Obsolete German units of measurement
08,888.89 |  | Baden |  |  |  | Obsolete German units of measurement
09,062 | mittlere Post- / Polizeimeile
(middle post mile or police mile) | Saxony |  | 1722 |  | Obsolete German units of measurement
09,206.3 |  | Electorate of Hesse |  |  |  | Obsolete German units of measurement
09,261.4 | (for comparison) |  |  |  | 5 meridian minutes |
09,277 | (for comparison) |  |  |  | 5 equatorial minutes |
09,323 | alte Landmeile
(old state mile) | Hanover |  | 1836 |  | Obsolete German units of measurement
09,347 | alte Landmeile
(old state mile) | Hanover |  | 1836 |  | Obsolete German units of measurement
09,869.6 |  | Oldenburg |  |  |  |
10,000 | metric mile, Scandinavian mile | Norway, Sweden |  | today |  | Still commonly used today, e.g. for road distances; equates to the myriametre
10,044 | große Meile
(great mile) | Westphalia |  |  |  | Obsolete German units of measurement
10,670 |  | Finland |  |  |  |
10,688.54 | mil | Sweden |  | 1889 |  | In normal speech, "mil" means a Scandinavian mile of 10 km.
11,113.7 | (for comparison) |  |  |  | 6 meridian minutes |
11,132.4 | (for comparison) |  |  |  | 6 equatorial minutes |
11,299 | mil | Norway |  |  |  | was equivalent to 3,000 Rhenish rods.

Similar units:

* 1,066.8 m – verst, see also obsolete Russian units of measurement

## Idioms

[edit]

The mile is still used in a variety of idioms, even in English-speaking countries that have moved from the Imperial to the metric system (for example, Australia, Canada, or New Zealand). These idioms include:

* A country mile is used colloquially to denote a very long distance
* "A miss is as good as a mile" (failure by a narrow margin is no better than any other failure)
* "Give him an inch and he'll take a mile" – a corruption of "Give him an inch and he'll take an ell"[102][103] (the person in question will become greedy if shown generosity)
* "Missed by a mile" (missed by a wide margin)
* "Go a mile a minute" (move very quickly)
* "Talk a mile a minute" (speak at a rapid rate)
* "To go the extra mile" (to put in extra effort)
* "Miles away" (lost in thought, or daydreaming)
* "Milestone" (an event indicating significant progress)
* Glasgow's miles better, a touristic campaign.

## See also

[edit]

* Science portal

* Biblical mile
* Chinese mile (里)
* Data mile
* Food miles
* Four-minute mile
* Geographical mile
* Medieval weights and measures
* Mile run
* Scandinavian mile
* Section lines

## Notes

[edit]

1. ^ Exactly ⁠50292/57875⁠ nmi
2. ^ A partitive genitive construction literally meaning "one thousand of paces".[8]
3. ^ The c. 1300 Composition of Yards and Perches, a statute of uncertain date usually reckoned as an enactment of Edward I[27] or II,[26] notionally continued to derive English units from three barleycorns "dry and round" to the inch[27] and this statute remained in force until the 1824 Weights and Measures Act establishing the Imperial system. In practice, official measures were verified using the standards at the Exchequer or simply ignored.[28]
4. ^ "Pole" being another name for the rod.
5. ^ When reading the document it helps to bear in mind that 999,998 = 3,937 × 254.

## References

[edit]

### Citations

[edit]

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44. ^ Rowlett (2018), "Irish mile".
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55. ^ Opačić, Nives (23 February 2003). "Mrvice s banskoga stola". Vijenac (in Croatian). No. 232\. Zagreb: Matica hrvatska. Archived from the original on 14 February 2020. Retrieved 8 July 2019.
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57. ^ 1,760 yards × 0.9144 m/yard.[56]
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60. ^ Astin (1959).
61. ^ Convert mile [statute] to mile [statute, US] Archived 20 February 2015 at the Wayback Machine "1 metre is equal to 0.000621371192237 mile [statute], or 0.000621369949495 mile [statute, US]. ... The U.S. statute mile (or survey mile) is defined by the survey foot. This is different from the international statute mile, which is defined as exactly 1609.344 metres. The U.S. statute mile is defined as 5,280 U.S. survey feet, which is around 1609.347219 metres."
62. ^ File:Naypyitaw Tollbooth.jpg
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64. ^ Maximum posted speed limits Archived 23 September 2011 at the Wayback Machine (US) IIHS. Retrieved 14 September 2011
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66. ^ "The Nassau Guardian". 29 August 2012. Archived from the original on 29 October 2013. Retrieved 18 January 2014.
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70. ^ "Bronze medal for Falklands football at Island Games in Bermuda". Penguin-news.com. 24 July 2013. Archived from the original on 24 September 2015. Retrieved 18 January 2014.
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72. ^ "Navy evacuates patient from cruise ship 50 miles off Guam". Pacific Daily News. 9 March 2013. Archived from the original on 16 September 2013. Retrieved 18 January 2014.
73. ^ "Saipan Tribune". 23 September 2013. Archived from the original on 23 September 2013. Retrieved 10 March 2023.
74. ^ "When you need to go". 23 September 2013. Archived from the original on 23 September 2013. Retrieved 10 March 2023.
75. ^ "The Voice – The national newspaper of St. Lucia since 1885". Thevoiceslu.com. 8 February 2008. Archived from the original on 29 October 2013. Retrieved 18 January 2014.
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79. ^ "Provo has a new club". Suntci.com. 15 July 2009. Archived from the original on 29 October 2013. Retrieved 18 January 2014.
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81. ^ Branch, Legislative Services (19 April 2021). "Consolidated federal laws of Canada, Weights and Measures Act". laws-lois.justice.gc.ca. Archived from the original on 10 March 2023. Retrieved 10 March 2023.

Act current to 18 January 2012. Canadian units (5) The Canadian units of measurement are as set out and defined in Schedule II, and the symbols and abbreviations therefor are as added pursuant to subparagraph 6(1)(b)(ii).
82. ^ Weights and Measures Act Archived 16 October 2012 at the Wayback Machine
83. ^ Government of Canada, Transportation Safety Board of Canada (26 October 2011). "Railway Investigation Report R10E0096 - Transportation Safety Board of Canada". www.tsb.gc.ca. Archived from the original on 14 September 2022. Retrieved 10 March 2023.

February 2012, Rail Report – 2010 – Report Number R10E0096. Other Factual Information (See Figure 1). 2. Assignment 602 travelled approximately 12 car lengths into track VC-64 and at a speed of 9 mph struck a stationary cut of 46 empty cars (with the air brakes applied) that had been placed in the track about 2+1⁄2 hours earlier. Canadian railways have not been metricated and therefore continue to measure trackage in miles and speed in miles per hour.
84. ^ Hastings Racecourse Fact Book Archived 18 April 2012 at the Wayback Machine Like Canadian railways, Canadian race tracks have not been metricated and continue to measure distance in miles, furlongs, and yards (see page 18 of the fact book).
85. ^ "Appendix E. General Tables of Units of Measurement". Retrieved 14 January 2020. (links to a Microsoft Word document)
86. ^ a b c d e US National Geodetic Survey. "What are the 'official' conversions that are used by NGS to convert 1) metres to inches, and 2) metres to feet?". Frequently Asked Questions about the National Geodetic Survey. Archived from the original on 5 September 2015. Retrieved 16 May 2009.
87. ^ "NGS and NIST to Retire U.S. Survey Foot after 2022". National Geodetic Survey. 31 October 2019. Archived from the original on 27 May 2021. Retrieved 4 March 2020.
88. ^ "U.S. Survey Foot: Revised Unit Conversion Factors". NIST. 16 October 2019. Archived from the original on 2 March 2020. Retrieved 4 March 2020.
89. ^ "Federal Register :: Request Access". 5 October 2020. Archived from the original on 21 December 2022. Retrieved 5 July 2022.
90. ^ Maloney (1978), p. 34.
91. ^ Maloney (1978), pp. 34–35.
92. ^ International Bureau of Weights and Measures (2006), The International System of Units (SI) (PDF) (8th ed.), p. 127, ISBN 92-822-2213-6, archived (PDF) from the original on 4 June 2021, retrieved 16 December 2021.
93. ^ Rowlett (2018), "data mile".
94. ^ Rowlett (2018), "radar mile".
95. ^ Rowlett (2018), "meile".
96. ^ Rowlett (2018), "mile".
97. ^ Leopold Carl Bleibtreu: Handbuch der Münz-, Maß- und Gewichtskunde und des Wechsel-Staatspapier-, Bank- und Aktienwesens europäischer und außereuropäischer Länder und Städte. Verlag von J. Engelhorn, Stuttgart, 1863, p. 332
98. ^ R. C. A. Rottländer (January 2006). "Hierarchische Gliederung der vormetrischen Längeneinheiten". vormetrische-laengeneinheiten.de. Archived from the original on 22 February 2006. Retrieved 10 March 2023.
99. ^ a b c d e f g h i j k Helmut Kahnt (1986), BI-Lexikon Alte Maße, Münzen und Gewichte, Leipzig: VEB Bibliographisches Institut, p. 380
100. ^ IKAR-Altkartendatenbank[permanent dead link] der Staatsbibliothek zu Berlin, Kartenabteilung.
101. ^ Gloger, Zygmunt (1898). Ksiega rzeczy polskich. Druk W.L. Anczyca i Sp. OL 23442814M. Archived from the original on 21 April 2021. Retrieved 21 April 2021.
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103. ^ John Heywood (1562). The proverbs, epigrams, and miscellanies of John Heywood ... Print. for subscribers, by the Early English Drama Society. pp. 95–. Retrieved 1 December 2011.

### Sources

[edit]

* Adams, Cecil (1990), "What's the origin of miles and yards?", The Straight Dope, archived from the original on 27 February 2015, retrieved 6 April 2015.
* The American Heritage Dictionary of the English Language (4 ed.), Boston: Houghton Mifflin Co., 2006 [Originally published 2001], ISBN 978-0-618-70172-8.
* Andrews, J.H. (15 September 2003), "Sir Richard Bingham and the Mapping of Western Ireland" (PDF), Proceedings of the Royal Irish Academy, vol. 103C, No. 3, Dublin: Royal Irish Academy, archived from the original (PDF) on 17 February 2012, retrieved 27 October 2011.
* Astin, A.V.; et al. (25 June 1959), Doc. 59-5442: Refinement of values for the yard and the pound (PDF), Washington, D.C.: National Bureau of Standards, archived (PDF) from the original on 21 August 2006, retrieved 2 November 2008.
* Barbrow, Louis E.; et al. (1976), Weights and Measures Standards of the United States—A Brief History (PDF), National Institute of Standards and Technology, doi:10.6028/NBS.SP.447, archived (PDF) from the original on 10 February 2023, retrieved 14 August 2020.
* Bigg, P.H.; et al. (1964), "The United Kingdom Standards of the Yard in Terms of the Metre", British Journal of Applied Physics, vol. 15, No. 3, pp. 291–300, Bibcode:1964BJAP...15..291B, doi:10.1088/0508-3443/15/3/308, archived from the original on 3 August 2012, retrieved 17 May 2009.
* Burke, James (1978), Connections, Little, Brown, & Co., ISBN 0-316-11685-8.
* Butcher, Tina, ed. (2014), "Appendix C", NIST Handbook 44: Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, archived from the original on 6 August 2016, retrieved 13 July 2017.
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* Evans, I. M. (1975), "A Cartographic Evaluation of the Old English Mile", The Geographical Journal, 141 (2): 259–264, Bibcode:1975GeogJ.141..259E, doi:10.2307/1797211, JSTOR 1797211
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## Further reading

[edit]

* NIST General Tables of Units of Measurement, United States National Institute of Standards and Technology, archived from the original on 10 December 2011
* "Tafel zur Vergleichung und Bestimmung der Wegemaasse", Naturhistorische und chemischtechnische Notizen nach den neuesten Erfahrungen zur Nutzanwendung für Gewerbe, Fabrikwesen und Landwirthschaft, Expedition der Medicinischen Centralzeitung, 1856, pp. 320–326 (Item notes: Sammlung5-6 (1856–57) Original from Harvard University Digitized 9 January 2008)
* Smits, Jan (15 February 2013) [1996], Mathematical data for bibliographic descriptions of cartographic materials and spatial data, Personal page on website ICA Commission on Map Projections, archived from the original on 12 February 2014
* Wigglesworth Clarke, Frank (1875), Weights, measures, and money, of all nations, New York, D. Appleton & Company, p. 91

* v
* t
* e

Hellenic measurement

Length|

* pous
* plethron
* stade
* milion
* parasang
* schoenus

Volume|

medimnos

Other|

Salamis Stone

* v
* t
* e

Imperial units

Comparison with US customary system

Length|

* Twip
* Thousandth of an inch
* Barleycorn
* Inch
* Hand
* Link
* Foot
* Yard
* Fathom
* Rod
* Chain
* Gunter's chain
* Furlong
* Cable
* Mile
* Nautical mile
* League

Area|

* Square inch
* Square foot
* Square yard
* Perch
* Rood
* Acre
* Square mile

Volume|

| Derived|

* Cubic inch
* Cubic foot
* Hoppus
* Cubic yard
* Cubic mile
* Tmcft

|

Cooking|

* Teaspoon
* Tablespoon
* Fluid ounce
* Cup
* Pint
* Quart
* Trade gallon
* Gallon

Other|

* Chaldron
* Minim
* Gill
* Fluid Scruple
* Fluid Drachm
* Peck
* Bushel
* Barrel
* Stuck
* Hogshead

Speed|

* Miles per hour

Mass|

* Grain
* Drachm
* Ounce
* Pound (mass)
* Stone
* Quarter
* Slug
* Long hundred
* Hundredweight
* Ship load
* Ton

Pressure|

* Ksi
* Pounds per square inch

Other units and measures|

* British thermal unit
* Degree
* Fahrenheit
* Rankine
* Foot-candle
* Foot-pound
* Foot-poundal
* Horsepower
* Horsepower-hour
* Kenning
* Pound (force)
* Pound-foot
* Poundal
* Span
* Spinning count

Related systems|

* Avoirdupois system
* English units
* Winchester
* Exchequer
* English Engineering units
* Foot–pound–second system (FPS)
* Twenty-foot equivalent unit

* v
* t
* e

United States customary units

Comparison with imperial unit system

Length|

* Thousandth of an inch
* Inch
* Hand
* Link
* Foot
* Yard
* Rod
* Chain
* Furlong
* Mile
* Statute mile

Area|

* Square inch
* Square foot
* Square yard
* Acre
* Square mile

Volume|

| Derived|

* Cubic inch
* Cubic foot
* Cubic yard
* Cubic mile

|

Cooking|

* Teaspoon
* Tablespoon
* Fluid ounce
* Cup
* Pint
* Quart
* Gallon

Wood|

* Board foot
* Cord
* Face cord

Other|

* Minim
* Gill
* Peck
* Bushel
* Barrel
* Acre-foot

Speed|

* Foot per second
* Miles per hour

Mass|

* Grain
* Dram
* Ounce
* Pound
* Hundredweight
* Ton
* Long
* Short

Force|

* Poundal
* Pound-force
* Kip

Pressure|

* Inch of mercury
* Pound per square inch
* Kilopound per square inch

Other units and measures|

* Bolt (cloth)
* British thermal unit
* Degree (angle)
* Fahrenheit
* Foot-candle
* Foot-lambert
* Foot-pound (energy)
* Horsepower
* Perm
* Pound-foot (torque)
* Spinning count
* Ton of refrigeration

Related systems|

* American wire gauge
* Avoirdupois system
* Body jewelry sizes
* English Engineering Units
* Foot–pound–second system of units

Authority control databases |

* Encyclopedia of Modern Ukraine
* İslâm Ansiklopedisi

|

*[lit.]: literally
*[abbr.]: abbreviated
*[pl.]: plural
*[c.]: circa
*[Eliz. I]: Elizabeth I
*[cap.]: Chapter
*[s.]: section
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