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The litre or liter (see spelling differences) is a unit of volume. There are two official symbols, namely the Latin letter L both in lower and upper case: l and L. The litre appears in several versions of the metric system; although not an SI unit, it is accepted for use with the SI. The international unit of volume is the cubic metre (m³). One litre is denoted as 1 dm³. Spelling differences redirects here. ... For other uses, see Volume (disambiguation). ... For other uses, see L (disambiguation). ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... Look up si, Si, SI in Wiktionary, the free dictionary. ... The cubic meter (symbol m³) is the SI derived unit of volume. ... A cubic decimetre (symbol dm³) is an SI derived unit of volume. ... Contents 1 Origin 2 Definition 3 SI prefixes applied to the litre 4 Non-metric conversions 4.1 Rough conversions 5 Explanation 6 Symbol 7 History 8 Colloquial and practical usage 9 See also 10 References 11 External links [edit] Origin The word "litre" is derived from an older French unit, the litron, whose name came from Latin via Greek. The original metric system used litre as a base unit. This article or section cites very few or no references or sources. ... [edit] Definition A litre is defined as a special name for a cubic decimetre (1 L = 1 dm³). Hence 1 L ≡ 0.001 m³ (exactly). A cubic decimetre (symbol dm³) is an SI derived unit of volume. ... The cubic metre (symbol m³) is the SI derived unit of volume. ... [edit] SI prefixes applied to the litre The litre may be used with any SI prefix. The more often used terms are in bold in the table below. An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple. ... Multiple Name Symbols Equivalent volume Multiple Name Symbols Equivalent volume 100 L litre l L dm³ cubic decimetre     101 L decalitre dal daL   (10 dm³) 10–1 L decilitre dl dL   (100 cm³) 102 L hectolitre hl hL   (100 dm³) 10–2 L centilitre cl cL   (10 cm³) 103 L kilolitre kl kL m³ cubic metre 10–3 L millilitre ml mL cm³ cubic centimetre (cc) 106 L megalitre Ml ML dam³ cubic decametre 10–6 L microlitre µl µL mm³ cubic millimetre 109 L gigalitre Gl GL hm³ cubic hectometre 10–9 L nanolitre nl nL 106 µm³ 1 million cubic micrometre 1012 L teralitre Tl TL km³ cubic kilometre 10–12 L picolitre pl pL 103 µm³ 1 thousand cubic micrometre 1015 L petalitre Pl PL 103 km³ 1 thousand cubic kilometre 10–15 L femtolitre fl fL µm³ cubic micrometre 1018 L exalitre El EL 106 km³ 1 million cubic kilometre 10–18 L attolitre al aL 106 nm³ 1 million cubic nanometre 1021 L zettalitre Zl ZL Mm³ cubic megametre 10–21 L zeptolitre zl zL 103 nm³ 1 thousand cubic nanometre 1024 L yottalitre Yl YL 103 Mm³ 1 thousand cubic megametre 10–24 L yoctolitre yl yL nm³ cubic nanometre [edit] Non-metric conversions Litre expressed in non-metric unit   Non-metric unit expressed in litre 1 L ≈ 0.87987699 Imperial quart             1 Imperial quart ≡ 1.1365225 litre           1 L ≈ 1.056688 US fluid quart   1 US fluid quart ≡ 0.946352946 litre   1 L ≈ 1.75975326 Imperial pint   1 Imperial pint ≡ 0.56826125 litre   1 L ≈ 2.11337641 US fluid pints   1 US fluid pint ≡ 0.473176473 litre   1 L ≈ 0.2641720523 US liquid gallon   1 US liquid gallon ≡ 3.785411784 litres   1 L ≈ 0.21997 Imperial gallon   1 Imperial gallon ≡ 4.54609 litres   1 L ≈ 0.0353146667 cubic foot   1 cubic foot ≡ 28.316846592 litres   1 L ≈ 61.0237441 cubic inches   1 cubic inch ≡ 0.01638706 litres   See also Imperial units and US customary units For other uses, see Quart (disambiguation). ... The pint is an English unit of volume or capacity in the imperial system and United States customary units, equivalent in each system to one half of a quart, and one eighth of a gallon. ... The gallon (abbreviation: gal) is a unit of volume. ... It has been suggested that Thousand Cubic Feet be merged into this article or section. ... A cubic inch is an Imperial unit / U.S. customary unit (non-SI non-metric) of volume, used in the United States. ... The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ... U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units — the modern metric system). ... [edit] Rough conversions A litre is the volume of a cube with sides of 10 cm, which is slightly less than a cube of sides 4 inches (or one-third of a foot). Twenty-seven cubes "one-third of a foot on each side" would fit in one cubic foot, which is within 5% of the actual value of exactly 28.316846592 litres. One litre is also slightly more than one U.S. liquid quart and slightly less than one Imperial quart or the less common U.S. dry quart. A measured cup is roughly 250 mL. The cup is a unit of measurement for volume, used in cooking to measure bulk foods, such as chopped vegetables (dry measurement), and liquids (fluid measurement). ... [edit] Explanation Litres are most commonly used for items measured by the capacity or size of their container (such as fluids and berries), whereas cubic metres (and derived units) are most commonly used for items measured either by their dimensions or their displacements. The litre is often also used in some calculated measurements, such as density (kg/L), allowing an easy comparison with the density of water. A fluid is defined as a substance that continually deforms (flows) under an applied shear stress regardless of the magnitude of the applied stress. ... This article is about the fruit. ... One litre of water has a mass of almost exactly one kilogram (1 litre of chemically pure water has a mass of 1 kg at 277.13 K (3.98 °C or 39.164 °F), at which point the pure water occupies the minimum volume per mass). Similarly: 1 millilitre of water has about 1 g of mass; 1,000 litres of water has about 1,000 kg (1 tonne) of mass. This relationship is because the gram was originally defined as the mass of 1 mL of water. However, this definition was abandoned in 1964 because the density of water changes with pressure and the units of pressure are dependent on the definition of mass. This article or section is in need of attention from an expert on the subject. ... “Kg” redirects here. ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ... A tonne or metric ton (symbol t), sometimes referred to as a metric tonne, is a measurement of mass equal to 1,000 kilograms. ... [edit] Symbol Originally, the only symbol for the litre was l (lowercase letter l), following the SI convention that only those unit symbols that abbreviate the name of a person start with a capital letter. Look up si, Si, SI in Wiktionary, the free dictionary. ... In many English-speaking countries, the most common shape of a handwritten Arabic digit 1 is just a vertical stroke, that is it lacks the upstroke added in many other cultures. Therefore, the digit 1 may easily be confused with the letter l. On some typewriters, particularly older ones, the unshifted L key had to be used to type the numeral 1. Further, even in some computer typefaces, the two characters are barely distinguishable at all. This caused some concern, especially in the medical community. As a result, L (uppercase letter L) was accepted as an alternative symbol for litre in 1979. The United States National Institute of Standards and Technology now recommends the use of the uppercase letter L, a practice that is also widely followed in Canada and Australia. In these countries, the symbol L is also used with prefixes, as in mL and µL, instead of the traditional ml and µl used in Europe. In the UK and Ireland, lowercase l is used with prefixes, though whole litres are often written in full (so, "750 ml" on a wine bottle, but often "1 litre" on a juice carton). Arabic numerals (also called Hindu numerals or Hindu-Arabic numerals) are by far the most common form of symbolism used to represent numbers. ... NIST logo The National Institute of Standards and Technology (NIST, formerly known as The National Bureau of Standards) is a non-regulatory agency of the United States Department of Commerce’s Technology Administration. ... Prior to 1979, the symbol ℓ (script small l, U+2113), came into common use in some countries; for example, it was recommended by South African Bureau of Standards publication M33 in the 1970s. This symbol can still be encountered occasionally in some English-speaking countries, and its use is ubiquitous in Japan and South Korea. Nevertheless, it is not used in most countries and not officially recognised by the BIPM, the International Organization for Standardization, or any national standards body. The Unicode Standard, Version 5. ... The Bureau International des Poids et Mesures (International Bureau of Weights and Measures, or BIPM) is a standards organization, one of the three organizations established to maintain the SI system under the terms of the Metre Convention. ... “ISO” redirects here. ... [edit] History In 1795, the litre was introduced in France as one of the new "Republican Measures", and defined as one cubic decimetre. In 1879, the CIPM adopted the definition of the litre, and the symbol l (lowercase letter l). The International Committee for Weights and Measures is the English name of the Comité international des poids et mesures (CIPM, sometimes written in English Comité International des Poids et Mesures). ... In 1901, at the 3rd CGPM conference, the litre was redefined as the space occupied by 1 kg of pure water at the temperature of its maximum density (3.98 °C) under a pressure of 1 atm. This made the litre equal to about 1.000 028 dm³ (earlier reference works usually put it at 1.000 027 dm³). The General Conference on Weights and Measures is the English name of the Conférence générale des poids et mesures (CGPM, never GCWM). ... Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ... Diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure) Atmospheric pressure is the pressure at any point in the Earths atmosphere. ... In 1964, at the 12th CGPM conference, the original definition was reverted to, and thus the litre was once again defined in exact relation to the metre, as another name for the cubic decimetre, that is, exactly 1 dm³. [1] The General Conference on Weights and Measures is the English name of the Conférence générale des poids et mesures (CGPM, never GCWM). ... In 1979, at the 16th CGPM conference, the alternative symbol L (uppercase letter L) was adopted. It also expressed a preference that in the future only one of these two symbols should be retained, but in 1990 said it was still too early to do so.[2] The General Conference on Weights and Measures is the English name of the Conférence générale des poids et mesures (CGPM, never GCWM). ... [edit] Colloquial and practical usage In spoken English, the abbreviation "mL" (for millilitre) is often pronounced as "mil", which is homophonous with the term "mil", meaning "one thousandth of an inch". This generally does not create confusion, because the context is usually sufficient — one being a volume, the other a linear measurement. The colloquial use of "mil" for millimetre for an ambiguous topic as in "5 mils of rain fell since 9am" may, however, be confusing. This article is about the term in linguistics. ... The abbreviation cc (for cubic centimetre) is also used colloquially for a millilitre, especially in the medical field, as well as in mechanics and related sports for combustion engine displacement. A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... The internal combustion engine is an engine in which the combustion of fuel and an oxidizer (typically air) occurs in a confined space called a combustion chamber. ... One complete cycle of a four cylinder, four stroke engine. ... In European countries where the metric system is common, the hectolitre is the typical unit for production and export volumes of beverages (milk, beer, soft drinks, etc); decilitres are found in cookbooks ; centilitres indicate the capacity of drinking glasses and of small bottles. In colloquial Dutch in Belgium, a 'vijfentwintiger' and a 'drieëndertiger' (literally 'twenty-fiver' and 'thirty-threer') are the common beer glasses, the corresponding bottles mention 25 cL or 33 cL. Bottles may also be 75 cL or half size at 37.5 cL for 'artisanal' brews or 70 cL for wines or spirits. Cans come in 25 cL, 33 cL and 50 cL aka 0.5 L. Family size bottles as for soft drinks or drinking water use the litre (0.5 L, 1 L, 1.5 L, 2 L), and so do beer barrels (50 L, or the half sized 25 L). This unit is most common for all other household size containers of liquids, from thermocans, by buckets, to bath tubs; as well as for fuel tanks and consumption for heating or by vehicles. The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... The word drink is primarily a verb, meaning to ingest liquids, see Drinking. ... For other uses, see Fuel (disambiguation). ... For larger volumes of fluids, such as annual consumption of tap water, lorry tanks, or swimming pools, the cubic metre is the general unit, as it is for all volumes of a non-liquid nature. There are a few exceptions in which the litre is used for rather large volumes, such as the irregularly shaped boot of a car or the internal size of a microwave oven. The cubic meter (symbol m³) is the SI derived unit of volume. ... In Canada, where SI is the official measuring system and in wide-spread use, consumer beverages are labelled almost exclusively using litres and millilitres. Hectolitres appear in industry, but centilitres and decilitres are rarely, if ever, used. Larger volumes are usually given in cubic metres (1 kL), or thousands or millions of cubic metres. The situation is similar in Australia, although kilolitres, megalitres and gigalitres are commonly used for measuring water consuption, reservoir capacities and river flows. [edit] See also Claude Émile Jean-Baptiste Litre Pint Gallon Kilogram Cubic metre Claude Émile Jean-Baptiste Litre is a fictional character created in 1978 by Kenneth Woolner of the University of Waterloo in order to justify the use of a capital L to denote litres. ... The pint is an English unit of volume or capacity in the imperial system and United States customary units, equivalent in each system to one half of a quart, and one eighth of a gallon. ... The gallon (abbreviation: gal) is a unit of volume. ... “Kg” redirects here. ... The cubic meter (symbol m³) is the SI derived unit of volume. ... [edit] References ^ Appendix C: General tables of units of measurement. NIST Handbook 44: Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices. National Institute of Standards and Technology (11 November 2000). Retrieved on 9 October 2006. ^ Bureau International des Poids et Mesures (2006). The International System of Units (SI), 159.  NIST logo The National Institute of Standards and Technology (NIST, formerly known as The National Bureau of Standards) is a non-regulatory agency of the United States Department of Commerce’s Technology Administration. ... [edit] External links BIPM's "SI Brochure" BIPM's "(Table 6 -) Non-SI units accepted for use with the International System" NIST note on SI units NIST recommends uppercase letter L UK National Physical Laboratory's "Internationally recognised non SI units" page Categories: Units of volume | Non-SI metric units

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