Miles to Lieues (mi to lieue)

1 mile equals 0.4128563413 lieues (rounded).

1 mile = 0.4128563413 lieues

How to convert miles to lieues

To convert miles to lieues, multiply the number of miles by 0.4128563413. The factor is rounded to 10 significant digits. To go the other way, multiply lieues by 2.422150031 (rounded).

lieues = miles × 0.4128563413

Example: 10 miles = 4.128563413 lieues.

About these units

Mile (mi)

US & ImperialCurrent unit

5,280 feet or 1,760 yards, exactly 1,609.344 meters. This is the statute (international) mile used on US and UK roads.

A thousand paces gave the mile its name. It descends from the Latin mille passus, the Roman mile, by way of Old English mil and Middle English myle. For centuries after Rome, miles of many lengths coexisted; a sixteenth-century Mercator map, for example, shows small, medium and large Flemish miles on a single scale bar. The English statute mile was fixed by an Act of Parliament under Elizabeth I in 1593, which declared that a mile contains eight furlongs, or 5,280 feet.

The 1959 international yard and pound agreement made that mile exactly 1,609.344 meters. A slightly longer US survey mile, about 1,609.347 meters, lingered in American land surveys and was slated for retirement from 1 January 2023. Today the mile is the road unit of the United Kingdom, the United States, Liberia and Myanmar, along with several territories such as the Bahamas, Belize, Guam and the US Virgin Islands. In Canada it survives chiefly in rail transport and horse racing.

1 mile = 1,609.344 meters (exactly).

Sources: Wikipedia: Mile; Wikipedia: Foot (unit); NIST Guide to the SI, Appendix B.8: conversion factors

Lieue (Paris League) (lieue)

French (Ancien Régime)Historical unit (no longer in standard use)

2,000 toises, about 3.898 km: the Paris league of 1674. The later post league (lieue de poste, 1737) was longer, at 2,200 toises or about 4.288 km.

Lieue descends from the Celtic league that the Romans adopted as the leuga. The Gallic version, about one and a half Roman miles, replaced the Roman mile as the official road distance in Gaul and Germania under Septimius Severus. In France the word later covered several different distances rather than one.

The figure used here, about 3,898 metres, is 2,000 toises, which Wikipedia's article on traditional French units calls the Paris league of 1674. The lieue de poste, which measured stages on the royal coach and mail routes, was set at 2,200 toises in 1737, about 4.288 kilometres. Wikipedia's league article lists the post league at the shorter 3,898 metres, so its two articles disagree about which league carried that name.

Other French leagues ranged from 10,000 to 14,400 pieds, or roughly 3.25 to 4.68 kilometres. The metric lieue of exactly 4,000 metres was used in the customary system between 1812 and 1840. Since the unit was never standardized, any conversion to kilometres should name which lieue is meant.

1 lieue (Paris league) = 3,898.07262 meters (approximately).

Sources: Wikipedia: League (unit); Wikipedia: Traditional French units of measurement; Wikipedia: Toise

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