Litre

Lmllitermilliliterhllitresmillilitrehectolitrehectoliterhectoliters
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.wikipedia
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Non-SI units mentioned in the SI

accepted unit(Accepted for use with the SI)accepted for use with SI
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.

Kilogram

kgmgmilligram
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.
The kilogram was originally defined as the mass of a litre (cubic decimetre) of water.

Metric system

metricmetric unitsmetric unit
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre. The original French metric system used the litre as a base unit. A litre is equal in volume to the millistere, an obsolete non-SI metric unit customarily used for dry measure.
Non-SI units accepted for use with the International System of Units (Table 6). This list includes the hour and minute, the angular measures (Degree, Minute and second of arc), and the historic [non-coherent] metric units, the litre, tonne, and hectare (originally agreed by the CGPM in 1879)

Volume

volumetriccapacityvolumes
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
The metric system also includes the litre (L) as a unit of volume, where one litre is the volume of a 10-centimetre cube.

SI base unit

base unitbase unitsbase
The original French metric system used the litre as a base unit.
Several other units, such as the litre (US English: liter), are formally not part of the SI, but are accepted for use with SI.

Pint

imperial pintpintspt
Pint
The imperial pint (≈ 568 ml) is used in the United Kingdom and Ireland and to a limited extent in Commonwealth nations.

Gallon

gallonsimperial gallonGPM
Gallon
Three significantly different sizes are in current use: the imperial gallon defined as 4.54609 litres (4 imperial quarts or 8 imperial pints), which is used in the United Kingdom, Canada, and some Caribbean nations; the US gallon defined as 231 cubic inches (4 US liquid quarts or 8 US liquid pints) or about 231 cuin, which is used in the US and some Latin American and Caribbean countries; and the least-used US dry gallon defined as 1//8 USbsh.

Cubic centimetre

cccm 3 cm³
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
A cubic centimetre (or cubic centimeter in US English) (SI unit symbol: cm 3 ; non-SI abbreviations: cc and ccm) is a commonly used unit of volume that extends the derived SI-unit cubic metre, and corresponds to the volume of a cube that measures 1 cm × 1 cm × 1 cm. One cubic centimetre corresponds to a volume of 1⁄1,000,000 of a cubic metre, or 1⁄1,000 of a litre, or one millilitre; thus, 1 cm 3 ≡ 1 mL.

Decimetre

dmdecimeterdecimetres
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
The common non-SI metric unit of volume, the litre, is defined as one cubic decimetre (however, from 1901 to 1964, there was a slight difference between the two due to the litre being defined with respect to the kilogram rather than the metre).

Metric prefix

prefixunit prefixdecimal
The litre, though not an official SI unit, may be used with SI prefixes.
The litre (equal to a cubic decimetre), millilitre (equal to a cubic centimetre), microlitre, and smaller are common.

International System of Units

SISI unitsSI unit
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
Certain units of time, angle, and legacy non-SI units have a long history of consistent use. Most societies have used the solar day and its non-decimal subdivisions as a basis of time and, unlike the foot or the pound, these were the same regardless of where they were being measured. The radian, being 1⁄2π of a revolution, has mathematical advantages but it is cumbersome for navigation, and, as with time, the units used in navigation are largely consistent around the world. The tonne, litre, and hectare were adopted by the CGPM in 1879 and have been retained as units that may be used alongside SI units, having been given unique symbols. The catalogued units are

Cubic inch

CIDcu inc.i.d.
The cubic inch and the cubic foot are still used as units of volume in the United States, although the common SI units of volume, the liter, milliliter, and cubic meter, are also used, especially in manufacturing and high technology.

Quart

qtquartsdryqt
All are roughly equal to one metric litre.

Dry measure

dry volumedrydry capacity
A litre is equal in volume to the millistere, an obsolete non-SI metric unit customarily used for dry measure.
In the original metric system, the unit of dry volume was the stere, equal to a one-meter cube, but this is not part of the modern metric system; the liter and the cubic meter are now used.

Units of measurement in France before the French Revolution

piedFrenchFrench feet
The word litre is derived from an older French unit, the [[Units of measurement in France before the French Revolution#Volume – Dry measures|litron]], whose name came from Greek — where it was a unit of weight, not volume — via Latin, and which equalled approximately 0.831 litres.

General Conference on Weights and Measures

CGPMCGPM conferenceCGPM (General Conference on Weights and Measures)
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.

American and British English spelling differences

spelling differencesorsee spelling differences
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
Some initials are usually upper case in the US but lower case in the UK: liter/litre and its compounds (2 L or 25 mL vs 2 l or 25 ml); and ante meridiem and post meridiem (10 P.M. or 10 PM vs 10 p.m. or 10 pm).

Cubic metre

m 3 cubic metermillion cubic metre
The litre (international spelling) or liter (American spelling) (symbols L or l ) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm 3 ), 1,000 cubic centimetres (cm 3 ) or 1/1,000 cubic metre.
= 1000 litres (exactly)

Engine displacement

displacementcapacitydisplaced
The abbreviation cc is still commonly used in many fields including medical dosage and sizing for small combustion engine displacement, such as those used in motorcycles.
It is commonly specified in cubic centimetres (cc or cm 3 ), litres (l), or cubic inches (CID).

United Kingdom

British🇬🇧UK
In the UK and Ireland as well as the rest of Europe, 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).
According to the Environment Agency, total water abstraction for public water supply in the UK was 16,406 megalitres per day in 2007.

Fluid ounce

fl ozouncefl. oz.
|align=right|28.4130625||millilitres

Claude Émile Jean-Baptiste Litre

Claude Émile Jean-Baptiste Litre
Claude Émile Jean-Baptiste Litre is a fictional character created in 1978 by Kenneth Woolner of the University of Waterloo to justify the use of a capital L to denote litres.

Acre-foot

acre-feetacre feetacre.ft
Acre-foot
Elsewhere in the world, where the metric system is in common use, water volumes can be expressed in either cubic metres (as in flow rates of cubic metres/second, or "cumecs") or, for water usage, storage or irrigation volumes, in kilolitres (kL = 1 cubic metre), megalitres (ML = 1,000 cubic metres), or gigalitres (GL = 1,000,000 cubic metres).

Greek language

GreekAncient GreekModern Greek
The word litre is derived from an older French unit, the [[Units of measurement in France before the French Revolution#Volume – Dry measures|litron]], whose name came from Greek — where it was a unit of weight, not volume — via Latin, and which equalled approximately 0.831 litres.