# Litre

Litre
One litre is the volume of a
cube with 10 cm sides
General information
Unit systemNon-SI unit accepted for use with SI
Unit ofVolume
Symboll[1] (ℓ) or L[1]
In SI base units:1 L = 10−3 m3

The litre (international spelling) or liter (American spelling) (SI symbols L and l,[1] other symbol used: ) is a metric system unit of volume which is a non-SI unit mentioned in the SI. It is equal to 1 cubic decimetre (dm3), 1,000 cubic centimetres (cm3) or 1/1,000 cubic metre. A cubic decimetre (or litre) occupies a volume of 10 cm × 10 cm × 10 cm (see figure) and is thus equal to one-thousandth of a cubic metre.

The original French metric system used the litre as a base unit. The word litre is derived from an older French unit, the litron, whose name came from Greek—where it was a unit of weight, not volume [2]—via Latin, and which equalled approximately 0.831 litres. The litre was also used in several subsequent versions of the metric system and is accepted for use with the SI,[3] although not an SI unit—the SI unit of volume is the cubic metre (m3). The spelling used by the International Bureau of Weights and Measures is "litre",[3] a spelling which is shared by almost all English-speaking countries. The spelling "liter" is predominantly used in American English.[a]

One litre of liquid water has a mass of almost exactly one kilogram, because the kilogram was originally defined in 1795 as the mass of one cubic decimetre of water at the temperature of melting ice (0 °C). Subsequent redefinitions of the metre and kilogram mean that this relationship is no longer exact.[4]

## Definition

Maßkrüge, one litre beer mugs, during the 2006 Oktoberfest in Germany

A litre is a cubic decimetre or 10 centimetres × 10 centimetres × 10 centimetres, (1 L ≡ 1 dm3 ≡ 1000 cm3). Hence 1 L ≡ 0.001 m3 ≡ 1000 cm3, and 1 m3 (i.e. a cubic metre, which is the SI unit for volume) is exactly 1000 L.

From 1901 to 1964, the litre was defined as the volume of one kilogram of pure water at maximum density (+4 °C) and standard pressure. The kilogram was in turn specified as the mass of the International Prototype of the Kilogram (a specific platinum/iridium cylinder) and was intended to be of the same mass as the 1 litre of water referred to above. It was subsequently discovered that the cylinder was around 28 parts per million too large and thus, during this time, a litre was about 1.000028 dm3. Additionally, the mass-volume relationship of water (as with any fluid) depends on temperature, pressure, purity and isotopic uniformity. In 1964, the definition relating the litre to mass was abandoned in favour of the current one. Although the litre is not an SI unit, it is accepted by the CGPM (the standards body that defines the SI) for use with the SI. CGPM defines the litre and its acceptable symbols.

A litre is equal in volume to the millistere, an obsolete non-SI metric unit customarily used for dry measure.

Other Languages
Afrikaans: Liter
Alemannisch: Liter
العربية: لتر
aragonés: Litro
অসমীয়া: লিটাৰ
asturianu: Llitru
azərbaycanca: Litr
تۆرکجه: لیتر
বাংলা: লিটার
Bân-lâm-gú: Li̍p
башҡортса: Литр
беларуская: Літр
беларуская (тарашкевіца)‎: Літар
български: Литър
བོད་ཡིག: སྤྱི་ཧྲན།
bosanski: Litar
brezhoneg: Litr
català: Litre
Чӑвашла: Литр
čeština: Litr
Cymraeg: Litr
dansk: Liter
Deutsch: Liter
eesti: Liiter
Ελληνικά: Λίτρο
español: Litro
Esperanto: Litro
euskara: Litro
فارسی: لیتر
français: Litre
Frysk: Liter
furlan: Litri
Gaeilge: Lítear
galego: Litro

한국어: 리터
հայերեն: Լիտր
हिन्दी: लीटर
hrvatski: Litra
Ido: Litro
Ilokano: Litro
Bahasa Indonesia: Liter
interlingua: Litro
íslenska: Lítri
italiano: Litro
עברית: ליטר
Jawa: Liter
ಕನ್ನಡ: ಲೀಟರ್
къарачай-малкъар: Литр
ქართული: ლიტრი
қазақша: Литр
Kiswahili: Lita
kurdî: Lîtir
Кыргызча: Литр
Latina: Litrum
latviešu: Litrs
Lëtzebuergesch: Liter
лезги: Литр
lietuvių: Litras
Limburgs: Liter
lumbaart: Lìter
magyar: Liter
македонски: Литар
മലയാളം: ലിറ്റർ
मराठी: लीटर
مصرى: ليتر
Bahasa Melayu: Liter
монгол: Литр
မြန်မာဘာသာ: လီတာ
Nederlands: Liter
नेपाल भाषा: लितर

Nordfriisk: Liter
norsk: Liter
norsk nynorsk: Liter
occitan: Litre
oʻzbekcha/ўзбекча: Litr
ਪੰਜਾਬੀ: ਲੀਟਰ
پنجابی: لٹر
Patois: Liita
polski: Litr
português: Litro
română: Litru
русиньскый: Литер
русский: Литр
саха тыла: Лиитэрэ
Scots: Litre
shqip: Litri
sicilianu: Litru
Simple English: Litre
slovenčina: Liter
slovenščina: Liter
Soomaaliga: Litir
کوردی: لیتر
српски / srpski: Литар
srpskohrvatski / српскохрватски: Litar
Sunda: Léter
suomi: Litra
svenska: Liter
Tagalog: Litro
தமிழ்: லிட்டர்
tarandíne: Litre
తెలుగు: లీటరు
ไทย: ลิตร
Türkçe: Litre
українська: Літр
اردو: لٹر
vèneto: Litro
Tiếng Việt: Lít
walon: Lite
Winaray: Litro

Xitsonga: Litara
ייִדיש: ליטער

žemaitėška: Lėtros