Module:Convert/documentation/conversion data

This documentation
is transcluded
from here.

Following is the master list of conversion data used by Module:Convert, although more units may temporarily be at Module:Convert/extra. Units should be discussed at Template talk:Convert.

This page is read by a script (makeunits). The script extracts information from the wikitext, and outputs the Lua source that defines the table of units; that source can be manually copied into Module:Convert/data.

Conversion factors and physical constants

The values for most of the conversion factors used by Template:Convert come from international and national standards documents:

Organisation Intergouvernementale de la Convention du Mètre (2014) [2006]. The International System of Units (SI) (PDF). Bureau International des Poids et Mesures. Retrieved 26 June 2018. This documents links to the NIST document in section 4.2 "Other non-SI units not recommended for use".
Thompson, Ambler; Taylor, Barry N. (November 2008). Guide for the Use of the International System of Units (SI) - Publication 811, 2008 Edition, 2nd printing (PDF). National Institute of Standards and Technology, U.S. Department of Commerce. Retrieved 26 June 2018.

The NIST document gives conversion factors correct to 7 places. Factors in bold are exact. If exact factors have more than 7 places, they are rounded and no longer exact. This convert module replaces these rounded figures with the exact figures. For example, the NIST document has 1 square mile = 2.589 988 E+06 square meters. The convert template has 1 square mile = 2,589,988.110336 square meters.

Values for the fundamental physical constants come from the NIST Reference on Constants, Units, and Uncertainty, either the 2010 or the 2014 version. The 2018 version is in preparation. While the articles on the units should be updated as the new versions come out every four years, the few more significant figures provided are probably not necessary for the way this template is used.

"CODATA 2010 Table at NIST" (PDF). From Mohr, Peter J.; Taylor, Barry N.; Newell, David B. (2012). "CODATA recommended values of the fundamental physical constants: 2010". Reviews of Modern Physics. 84 (4): 1527–1605. doi:10.1103/RevModPhys.84.1527.
"CODATA 2014 Table at NIST". From Mohr, Peter J.; Newell, David B.; Taylor, Barry N. (2016). "CODATA recommended values of the fundamental physical constants: 2014". Reviews of Modern Physics. 88 (3). doi:10.1103/RevModPhys.88.035009.

Definitions for additional historical measures are found in sources such as

Fenna, Donald (2002). A Dictionary of Weights, Measures, and Units. Oxford University Press. ISBN 978-0-19-107898-9.

Table format

Format

The script that reads this page ignores everything except for the wikitext in the following sections:

== Conversions ==

== Input multiples ==

== Output multiples ==

== Combinations ==

== Defaults ==

== Links ==

== Automatic per units ==

== Overrides ==

== Variable names == (used at slwiki)

In those sections, a level-3 heading (like === Length ===) starts a table that defines units of a certain type. In the subsection, lines that start with | are processed (all other lines, and lines that start with |- or |}, are ignored). A processed line is split into fields (delimited with ||), and leading/trailing whitespace is removed from each field. Empty fields in the Conversions section are given a default value (for example, the plural of yard is formed by adding s, and the US names are also yard and yards).

The second field in each row of the Conversions section normally specifies a unit's symbol, but it can be used for other purposes described in the following. In some cases the text in the second field can be long, and it is convenient to insert colspan="11" | before the text to avoid it wrapping in a narrow column. Any such colspan at the start of the second field is ignored.

Alias

Some unit codes are an alias for another spelling of the unit code. For example, the code ft2 is an alias for sqft, and that is indicated by entering =sqft in the Symbol column for the ft2 entry. An alias can only be entered after the primary unit has been defined (the sqft entry must precede the ft2 entry).

Normally there are no other entries on an alias line, however, the following may be used:

default = unit code to specify that the alias has a default output that is different from the primary unit
link = link text to specify that the alias has a link that is different from the primary unit
multiplier = number used as "multiplier = 100" with unit code 100km to define a unit that is 100 times the size of a kilometre
sp=us (or sp = us) to specify that using the alias forces US spelling for that unit
symbol = symbol text to specify that the alias has a symbol that is different from the primary unit
symlink = link text to specify that the alias has a different link when abbreviated ("symbol link")

Per units

A unit can be defined as a ratio of two other units. For example, L/km can be defined as "liters per kilometer" by entering ==L/km as the symbol for the unit. A single "=" is used with an alias to specify that a unit code is an alternative name for another unit. By contrast, if "==" is used, the unit code is defined as the first unit "per" the second.

As well as a ratio of two units, a per unit can be of the form "currency per unit". The module recognizes "$" and "£" as currency symbols and shows them appropriately. For example, the input |120|$/acre would be displayed as "$120 per acre", or "$120/acre" if abbreviated.

The definition for a per unit can be followed by the same modifiers available for an alias.

Should be

Some unit codes should not be used—if such a code is used, the template displays an error message telling the editor what unit code should be entered. For example, the code feet should not be used, and that is indicated by entering !Message in the Symbol column for the feet entry. There should be no other entries on an error line. The Message text is displayed as an error if feet is used in a conversion. The text should use the special format codes %{ and %} on each side of a unit code. The format codes are replaced with wikitext defined in Module:Convert, and which applies a consistent style to each displayed unit code.

Use name

Some units generally use their name, rather than a symbol. That is indicated by inserting ~ before the symbol. For example, the code acre has symbol ~acre which means results will use the singular name "acre", or the plural name "acres", depending on the value.

Use unit code for default

Some units have a symbol prefixed with *, for example, the symbol given for pitch is *µm. Normally, when units are looked up in the Defaults or Links exception tables, the symbol of the unit is used. However, pitch has a symbol that conflicts with micrometre. The * prefix means that the unit code for pitch is used to look up exceptions, not the symbol.

SI prefixes

The prefix column should be empty if SI prefixes are not used, SI for a unit that accepts SI prefixes, SI2 for a unit code that indicates a base unit squared, and SI3 for cubed. For example when defining unit code m2 put SI2 here, and for m3 say SI3. This will scale, for example, km2 to 1000 × 1000 of the base unit, m, or scale mm3 to 0.001 × 0.001 × 0.001 of the base unit m.

Name

The name of the unit is required. The plural name is optional. If no plural name is given, it is created by appending "s" to the singular name. For example, the ft unit has name "foot" and plural name "feet"—the plural name is necessary to avoid the plural of "foot" being "foots".

The US name is optional. If no US name is given, it is the same as the normal name. The US plural name is optional—if it is missing it is created by appending "s" to the US name. When using {{convert}}, the option |sp=us causes the US name to be displayed if a name is required for the convert.

Any %s in the name columns is replaced with the appropriate SI prefix, or is removed if SI prefixes are not appropriate (not suitable for the unit, or not used in the conversion). It is only necessary to use %s if the unit accepts prefixes, and if the prefix is not at the start of the unit's name, for example with m2 and m3.

Exceptions

Spelling exceptions can be handled by entering a row with the exception. For example, see ha which sets the unit name to "hectare"; without that row, the a row would cause ha to have the name "hectoare". There must be an override to document that an exception is intended.

Scale

The scale is a value or expression that is used as a factor to convert a value to its corresponding base unit. Commas may be used as a thousand separator (e.g. 1,000,000) or e notation may be used (e.g. 1e6). Fractions should be used when required for exactness (e.g. 1/12).

Extra

The Extra column is usually empty, but can contain a value or code when more than a simple Scale is required for a conversion. There are two codes used with fuel efficiency units: volume/length and length/volume. In addition, certain codes are required to indicate that the conversion procedure for the unit is built-in to the module. Any other text is used as an offset in the conversion calculation that occurs with temperature units.

Built-in units

The conversion procedure for some units (for example, the Mach unit of speed) are built into Module:Convert as they are too complex to be specified in a table. That is indicated by entering a code (which must be the same as used in the module) in the Extra column.

The script that reads this page contains a small amount of built-in data that does not conveniently fit into the tables below (see set_builtins in makeunits).

Default

A default is a code for a unit or combination that identifies the output unit or units that will be used if none is specified in the convert template. The Defaults section defines exceptions for unit codes with an SI prefix, where the default output is different from that of the base unit. Also, units using engineering notation may appear in the defaults section to define a default output for the unit.

A default may specify a unit code or an expression that tests the input value, and which produces one of two different outputs depending on that value. In the expression, v represents the input value specified in the convert template, and exclamation marks (!) are used to separate the expression into either three or four fields. For example, the following expression might be used as the default for unit in (inch):

v < 36 ! mm ! cm

The first field is a condition which evaluates to true or false. In this example, if the input value is less than 36, the default output unit is mm; otherwise, it is cm.

If present, the fourth field is appended to the result. For example, the following expression might be used for unit Ml (megalitre):

v < 28.316846592 ! e3 ! e6 ! cuft

If the condition is true, the result is e3cuft; otherwise, it is e6cuft.

Composite

A composite input unit consists of two standard units, where the second is a subdivision of the first. For example, |2|ft|6|in may be used to specify 2 feet 6 inches as the input unit in a conversion. See the Input multiples section.

Composites are defined in pairs, but any number of pairs can be used to specify an input. For example, given that ch is defined as a subdivision of mi, and that ft is a subdivision of ch, an input length could be specified as 1|mi|2|ch|3|ft. Also, with suitable pairs defined, an input length could be specified as 4|mi|3|yd|2|ft|1|in. There is no limit to the number of permitted subunits.

Multiple

A multiple is a unit code that can be used as an output. For example, ftin is a multiple that results in a length being expressed in feet and inches. A multiple may have any number of components defined in the Output multiples section, where each component is a subdivision of the preceding unit.

Link

The link column is the title of the article related to that unit. If the link is preceded with + or *, extra text will be inserted before the link, and the text shown by the link will be adjusted to omit a prefix of "US" or "U.S.", if present. For example, if a unit has the symbol "US gal" (or "U.S. gal"), and if the link is +[[Gallon]], then if the symbol is linked, it would appear as "US gal" ("US" and "gal" link to two different articles). If the link is *[[Gallon]], it would appear as "U.S. gal".

Similarly, if the link is preceded with @, extra text will be inserted before the link, and the text shown by the link will be adjusted to omit a prefix of "imp" or "imperial", if present. For example, if a unit has the symbol "imp gal", and if the link is @[[Gallon]], then if the symbol is linked, it would appear as "imp gal" ("imp" and "gal" link two different articles).

The Links section defines exceptions for unit codes with an SI prefix, where the linked article is different from that of the base unit.

Override

Some unit codes match a unit with an SI prefix, and duplicate unit codes are not permitted. For example, Pa can be interpreted as "peta-are" which would prevent the pascal unit of pressure being defined after the are unit of area. However, listing Pa in the Overrides section means that the pascal unit can be defined, in which case peta-are will not be available.

Conventions

Some unit codes are not intended to be used in a template, but are needed to define exceptions. For example, the code ft has link Foot (unit), but unit psi/ft needs ft to be linked to Fracture gradient. To handle such cases, a unit code starting with "-" is used (-ft-frac for feet with a link to fracture gradient).

If needed, more dashes can be used to define additional exceptions (for example, see -Scwt and --Scwt, which are similar to Scwt but have different names).

Engineering notation

In addition to the units defined in the data below, large scale units such as e6km (million kilometres) may be used. The following prefixes may be used, and the linked names are shown if |lk=on:

e3 (thousand)
e6 (million)
e9 (billion)
e12 (trillion)
e15 (quadrillion)

Any standard unit (not a combination, multiple, or built-in) may be used after an engineering notation prefix, including "temperature change" units, but not "temperature" units.

Notes on units

Energy and torque

By convention, units written as force-distance (such as lbft or kgf.m) are torque, and those written as distance-force (such as ftlbf) are energy. See WP:MOSNUM#Unit names and the discussion, and see Pound-foot (torque) and Foot-pound (energy).

However, some topics use traditional units that conflict with the above convention. To handle these, Module:Convert/makeunits includes a specials table that adds an "alttype" (alternate type) field to certain whitelisted units. The alttype field allows conversion between units of different type, provided each unit is whitelisted to allow the conversion.

As at December 2013, the following energy units have alttype = "torque" (the first line consists of different units, while the second line consists of aliases for units in the first line):

ftlb, ftlb-f, ftlbf, inlb, inlb-f, inlbf, inoz-f, inozf
ft.lbf, ft·lb-f, ft·lbf, in.lb-f, in.lbf, in.oz-f, in.ozf, in·lb-f, in·lbf, in·oz-f, in·ozf

The following torque units have alttype = "energy":

Nm
N.m, N·m

For example, the following conversion works despite the fact that Nm is torque and ftlbf is energy:

{{convert|1|Nm|ftlbf}} → 1 newton-metre (0.74 ft⋅lbf)

Conversions

The following tables define the standard units that are available for a conversion.

Absorbed radiation dose

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
Gy	Gy		1		gray				SI	rad	Gray (unit)
rad	rad		0.01		rad				SI	Gy	Rad (unit)

Acceleration

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
cm/s2	cm/s²	0.01	centimetre per second squared	centimetres per second squared	centimeter per second squared	centimeters per second squared	ft/s2	Gal (unit)
ft/s2	ft/s²	0.3048	foot per second squared	feet per second squared			m/s2	Foot per second squared
g0	g₀	9.80665	standard gravity	standard gravities			m/s2	Standard gravity
g-force	g	9.80665	g	g			m/s2	g-force
km/hs	km/(h⋅s)	5/18	kilometre per hour per second	kilometres per hour per second	kilometer per hour per second	kilometers per hour per second	mph/s	Acceleration
km/s2	km/s²	1000	kilometre per second squared	kilometres per second squared	kilometer per second squared	kilometers per second squared	mph/s	Acceleration
m/s2	m/s²	1	metre per second squared	metres per second squared	meter per second squared	meters per second squared	ft/s2	Metre per second squared
mph/s	mph/s	0.44704	mile per hour per second	miles per hour per second			km/hs	Acceleration
km/h/s	=km/hs
standard gravity	=g0

Area

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	Prefix	Default	Link
1000sqft	1000 sq ft		92.90304	thousand square feet	thousand square feet			m2	Square foot
a	a		100	are			SI	sqft	Hectare#Are
acre	~acre		4046.8564224	acre				ha	Acre
acre-sing	=acre
arpent	~arpent		3418.89	arpent				ha	Arpent
cda	cda		3930.395625	cuerda				ha acre	Cuerda
daa	daa		1000	decare				km2 sqmi	Decare
dunam	~dunam		1000	dunam				km2 sqmi	Dunam
dunum	~dunum		1000	dunum				km2 sqmi	Dunam
ha	ha		10,000	hectare				acre	Hectare
hectare	~ha		10,000	hectare				acre	Hectare
Irish acre	Irish acres		6555.2385024	Irish acre				ha	Acre (Irish)
m2	m²		1	square %smetre		square %smeter	SI2	sqft	Square metre
pondemaat	pond		3674.363358816	pondemaat	pondemaat			m2	nl:pondemaat
pyeong	~pyeong		400/121	pyeong	pyeong			m2	Pyeong
rai	rai		1600	rai	rai			m2	Rai (unit)
rood	~rood		1011.7141056	rood				sqft m2	Rood (unit)
sqfoot	sq ft		0.09290304	square foot	square foot			m2	Square foot
sqft	sq ft		0.09290304	square foot	square feet			m2	Square foot
sqin	sq in		0.00064516	square inch	square inches			cm2	Square inch
sqmi	sq mi		2,589,988.110336	square mile				km2	Square mile
sqnmi	sq nmi		3,429,904	square nautical mile				km2 sqmi	Nautical mile
sqperch	~perch		25.29285264	perch	perches			m2	Rod (unit)#Area and volume
sqverst	~square verst		1138062.24	square verst				km2 sqmi	Verst
sqyd	sq yd		0.83612736	square yard				m2	Square yard
tsubo	~tsubo		400/121	tsubo	tsubo			m2	Japanese units of measurement#Area
acres	=acre
are	=a
decare	=daa
foot2	=sqfoot
ft2	=sqft
in2	=sqin	symbol = in²
km²	=km2
mi2	=sqmi
million acre	=e6acre
million acres	=e6acre
million hectares	=e6ha
m²	=m2
nmi2	=sqnmi
pond	=pondemaat
sq arp	=arpent
sqkm	=km2
sqm	=m2
square verst	=sqverst
verst2	=sqverst
yd2	=sqyd

Area per unit area

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
m2/ha	m²/ha		0.0001		square metre per hectare	square metres per hectare	square meter per hectare	square meters per hectare		sqft/acre	Basal area
sqft/acre	sq ft/acre		1/43560		square foot per acre	square feet per acre				m2/ha	Basal area

Cent

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
cent	¢		1		cent					cent	Cent (currency)
¢	=cent

Charge

Unit code	Symbol	Scale	Name	Prefix	Default	Link
A.h	A⋅h	3600	ampere hour		coulomb	Ampere hour
coulomb	C	1	coulomb	SI	e	Coulomb
e	e	1.602176487e-19	elementary charge		coulomb	Elementary charge

Chemical amount

Unit code	Symbol	Scale	Name	Default	Link
g-mol	g‑mol	1	gram-mole	lbmol	Mole (unit)
gmol	gmol	1	gram-mole	lbmol	Mole (unit)
kmol	kmol	1000	kilomole	lbmol	Mole (unit)
lb-mol	lb‑mol	453.59237	pound-mole	mol	Pound-mole
lbmol	lbmol	453.59237	pound-mole	mol	Pound-mole
mol	mol	1	mole	lbmol	Mole (unit)

CO2 per unit volume

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
kgCO2/L	kg(CO₂)/L		1000		kilogram per litre	kilograms per litre	kilogram per liter	kilograms per liter		lbCO2/USgal	Exhaust gas
lbCO2/USgal	lbCO2/US gal		0.45359237/0.003785411784		pound per US gallon	pounds per US gallon				kgCO2/L	Exhaust gas

Concentration

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
oz/lb	==oz/lb	default = mg/kg
mg/kg	==mg/kg	default = oz/lb

Density

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
g/dm3	g/dm³		1	gram per cubic decimetre	grams per cubic decimetre	gram per cubic decimeter	grams per cubic decimeter	kg/m3	Density
g/L	g/L		1	gram per litre	grams per litre	gram per liter	grams per liter	lb/cuin	Density
g/mL	g/mL		1000	gram per millilitre	grams per millilitre	gram per milliliter	grams per milliliter	lb/cuin	Density
g/ml	g/ml		1000	gram per millilitre	grams per millilitre	gram per milliliter	grams per milliliter	lb/cuin	Density
kg/dm3	kg/dm³		1000	kilogram per cubic decimetre	kilograms per cubic decimetre	kilogram per cubic decimeter	kilograms per cubic decimeter	lb/cuft	Density
kg/L	kg/L		1000	kilogram per litre	kilograms per litre	kilogram per liter	kilograms per liter	lb/USgal	Density
kg/l	kg/l		1000	kilogram per litre	kilograms per litre	kilogram per liter	kilograms per liter	lb/USgal	Density
kg/m3	kg/m³		1	kilogram per cubic metre	kilograms per cubic metre	kilogram per cubic meter	kilograms per cubic meter	lb/cuyd	Density
lb/cuft	lb/cu ft		0.45359237/0.028316846592	pound per cubic foot	pounds per cubic foot			g/cm3	Density
lb/cuin	lb/cu in		453592.37/16.387064	pound per cubic inch	pounds per cubic inch			g/cm3	Density
lb/cuyd	lb/cu yd		0.45359237/0.764554857984	pound per cubic yard	pounds per cubic yard			kg/m3	Density
lb/impgal	lb/imp gal		0.45359237/0.00454609	pound per imperial gallon	pounds per imperial gallon			kg/L	Density
lb/in3	lb/cu in		45359237/1638.7064	pound per cubic inch	pounds per cubic inch			g/cm3	Density
lb/U.S.gal	lb/U.S. gal		589081/4916.1192	pound per U.S. gallon	pounds per U.S. gallon			kg/L	Density
lb/USbu	lb/US bu		0.45359237/0.03523907016688	pound per US bushel	pounds per US bushel			kg/m3	Bushel
lb/USgal	lb/US gal		589081/4916.1192	pound per US gallon	pounds per US gallon			kg/L	Density
lbm/cuin	lbm/cu in		45359237/1638.7064	pound mass per cubic inch	pounds mass per cubic inch			g/cm3	Density
mg/L	mg/L		0.001	milligram per litre	milligrams per litre	milligram per liter	milligrams per liter	lb/cuin	Density
oz/cuin	oz/cu in		453592.37/16.387064/16	ounce per cubic inch	ounces per cubic inch			g/cm3	Density
g/cm3	==g/cm3	default = lb/cuin
g/m3	==g/m3	default = lb/cuyd	link = Density
Mg/m3	==Mg/m3	default = lb/cuft
mg/l	==mg/l	default = oz/cuin
μg/dL	==μg/dL	default = lb/cuin
μg/l	==μg/l	default = oz/cuin
lb/ft3	=lb/cuft
lb/yd3	=lb/cuyd
lbm/in3	=lbm/cuin
mcg/dL	=μg/dL
oz/in3	=oz/cuin
ug/dL	=μg/dL
ug/l	=μg/l

Energy

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	US plural name	Prefix	Default	Link
B.O.T.U.	B.O.T.U.		3,600,000	Board of Trade Unit					MJ	Kilowatt-hour
bboe	bboe		6,117,863,200	barrel of oil equivalent	barrels of oil equivalent				GJ	Barrel of oil equivalent
BOE	BOE		6,117,863,200	barrel of oil equivalent	barrels of oil equivalent				GJ	Barrel of oil equivalent
BTU	BTU		1055.05585262	British thermal unit					kJ	British thermal unit
Btu	Btu		1055.05585262	British thermal unit					kJ	British thermal unit
BTU-39F	BTU_39°F		1059.67	British thermal unit (39°F)	British thermal units (39°F)				kJ	British thermal unit
Btu-39F	Btu_39°F		1059.67	British thermal unit (39°F)	British thermal units (39°F)				kJ	British thermal unit
BTU-59F	BTU_59°F		1054.804	British thermal unit (59°F)	British thermal units (59°F)				kJ	British thermal unit
Btu-59F	Btu_59°F		1054.804	British thermal unit (59°F)	British thermal units (59°F)				kJ	British thermal unit
BTU-60F	BTU_60°F		1054.68	British thermal unit (60°F)	British thermal units (60°F)				kJ	British thermal unit
Btu-60F	Btu_60°F		1054.68	British thermal unit (60°F)	British thermal units (60°F)				kJ	British thermal unit
BTU-63F	BTU_63°F		1054.6	British thermal unit (63°F)	British thermal units (63°F)				kJ	British thermal unit
Btu-63F	Btu_63°F		1054.6	British thermal unit (63°F)	British thermal units (63°F)				kJ	British thermal unit
BTU-ISO	BTU_ISO		1055.056	British thermal unit (ISO)	British thermal units (ISO)				kJ	British thermal unit
Btu-ISO	=BTU-ISO
BTU-IT	BTU_IT		1055.05585262	British thermal unit (IT)	British thermal units (IT)				kJ	British thermal unit
Btu-IT	Btu_IT		1055.05585262	British thermal unit (IT)	British thermal units (IT)				kJ	British thermal unit
BTU-mean	BTU_mean		1055.87	British thermal unit (mean)	British thermal units (mean)				kJ	British thermal unit
Btu-mean	Btu_mean		1055.87	British thermal unit (mean)	British thermal units (mean)				kJ	British thermal unit
BTU-th	BTU_th		1054.35026444	British thermal unit (thermochemical)	British thermal units (thermochemical)				kJ	British thermal unit
Btu-th	Btu_th		1054.35026444	British thermal unit (thermochemical)	British thermal units (thermochemical)				kJ	British thermal unit
Cal	Cal		4184	calorie					kJ	Calorie
cal	cal		4.184	calorie					J	Calorie
Cal-15	Cal₁₅		4185.8	Calorie (15°C)	Calories (15°C)				kJ	Calorie
cal-15	cal₁₅		4.1858	calorie (15°C)	calories (15°C)				J	Calorie
Cal-IT	Cal_IT		4186.8	Calorie (International Steam Table)	Calories (International Steam Table)				kJ	Calorie
cal-IT	cal_IT		4.1868	calorie (International Steam Table)	calories (International Steam Table)				J	Calorie
Cal-th	Cal_th		4184	Calorie (thermochemical)	Calories (thermochemical)				kJ	Calorie
cal-th	cal_th		4.184	calorie (thermochemical)	calories (thermochemical)				J	Calorie
CHU-IT	CHU_IT		1899.100534716	Celsius heat unit (International Table)	Celsius heat units (International Table)				kJ	Conversion of units#Energy
cufootnaturalgas	~cuftnaturalgas		1,055,055.85262	cubic foot of natural gas	cubic foot of natural gas				MJ	Conversion of units#Energy
cuftnaturalgas	~cuftnaturalgas		1,055,055.85262	cubic foot of natural gas	cubic feet of natural gas				MJ	Conversion of units#Energy
Eh	E_h		4.35974417e-18	Hartree					eV	Hartree
erg	erg		0.0000001	erg					μJ	Erg
eV	eV		1.602176487e-19	electronvolt					aJ	Electronvolt
feV	feV		1.602176487e-34	femtoelectronvolt					yJ	Electronvolt
foe	foe		1e44	foe					YJ	Foe (unit)
ftlb	ft⋅lb		1.3558179483314004	foot-pound					J	Foot-pound (energy)
ftlb-f	ft⋅lb_f		1.3558179483314004	foot-pound force	foot-pounds force				J	Foot-pound (energy)
ftlbf	ft⋅lbf		1.3558179483314004	foot-pound force	foot-pounds force				J	Foot-pound (energy)
ftpdl	ft⋅pdl		0.0421401100938048	foot-poundal					J	Foot-poundal
GeV	GeV		1.602176487e-10	gigaelectronvolt					nJ	Electronvolt
gTNT	~gram of TNT		4184	gram of TNT	grams of TNT				kJ	TNT equivalent
Gtoe	Gtoe		4.1868e19	gigatonne of oil equivalent	gigatonnes of oil equivalent				EJ	Tonne of oil equivalent
GtonTNT	~gigaton of TNT		4.184e18	gigaton of TNT	gigatons of TNT				EJ	TNT equivalent
GtTNT	~gigatonne of TNT		4.184e18	gigatonne of TNT	gigatonnes of TNT				EJ	TNT equivalent
GW.h	GW⋅h		3.6e12	gigawatt-hour					TJ	Kilowatt-hour
GWh	GWh		3.6e12	gigawatt-hour					TJ	Kilowatt-hour
hph	hp⋅h		2,684,519.537696172792	horsepower-hour					kWh	Horsepower
inlb	in⋅lb		0.1129848290276167	inch-pound					mJ	Foot-pound (energy)
inlb-f	in⋅lb_f		0.1129848290276167	inch-pound force	inch-pounds force				mJ	Foot-pound (energy)
inlbf	in⋅lbf		0.1129848290276167	inch-pound force	inch-pounds force				mJ	Foot-pound (energy)
inoz-f	in⋅oz_f		0.00706155181422604375	inch-ounce force	inch-ounces force				mJ	Foot-pound (energy)
inozf	in⋅ozf		0.00706155181422604375	inch-ounce force	inch-ounces force				mJ	Foot-pound (energy)
J	J		1	joule				SI	cal	Joule
kBOE	kBOE		6.1178632e12	kilo barrel of oil equivalent	kilo barrels of oil equivalent				TJ	Barrel of oil equivalent
kcal	kcal		4184	kilocalorie					kJ	Calorie
kcal-15	kcal₁₅		4185.8	kilocalorie (15°C)	kilocalories (15°C)				kJ	Calorie
kcal-IT	kcal_IT		4186.8	kilocalorie (International Steam Table)	kilocalories (International Steam Table)				kJ	Calorie
kcal-th	kcal_th		4184	kilocalorie (thermochemical)	kilocalories (thermochemical)				kJ	Calorie
kerg	kerg		0.0001	kiloerg					mJ	Erg
keV	keV		1.602176487e-16	kiloelectronvolt					fJ	Electronvolt
kgTNT	~kilogram of TNT		4,184,000	kilogram of TNT	kilograms of TNT				MJ	TNT equivalent
kt(TNT)	kt		4.184e12	kilotonne		kiloton			TJ	TNT equivalent
ktoe	ktoe		4.1868e13	kilotonne of oil equivalent	kilotonnes of oil equivalent				TJ	Tonne of oil equivalent
ktonTNT	kt		4.184e12	kiloton of TNT	kilotons of TNT				TJ	TNT equivalent
ktTNT	~kilotonne of TNT		4.184e12	kilotonne of TNT	kilotonnes of TNT				TJ	TNT equivalent
kW.h	kW⋅h		3,600,000	kilowatt-hour					MJ	Kilowatt-hour
kWh	kWh		3,600,000	kilowatt-hour					MJ	Kilowatt-hour
Mcal	Mcal		4,184,000	megacalorie					MJ	Calorie
mcal	mcal		0.004184	millicalorie					mJ	Calorie
Mcal-15	Mcal₁₅		4,185,800	megacalorie (15°C)	megacalories (15°C)				MJ	Calorie
mcal-15	mcal₁₅		0.0041858	millicalorie (15°C)	millicalories (15°C)				mJ	Calorie
Mcal-IT	Mcal_IT		4,186,800	megacalorie (International Steam Table)	megacalories (International Steam Table)				MJ	Calorie
mcal-IT	mcal_IT		0.0041868	millicalorie (International Steam Table)	millicalories (International Steam Table)				mJ	Calorie
Mcal-th	Mcal_th		4,184,000	megacalorie (thermochemical)	megacalories (thermochemical)				MJ	Calorie
mcal-th	mcal_th		0.004184	millicalorie (thermochemical)	millicalories (thermochemical)				mJ	Calorie
Merg	Merg		0.1	megaerg					J	Erg
merg	merg		0.0000000001	millierg					μJ	Erg
MeV	MeV		1.602176487e-13	megaelectronvolt					pJ	Electronvolt
meV	meV		1.602176487e-22	millielectronvolt					zJ	Electronvolt
MMBtu	MMBtu		1,055,055,852.62	million British thermal units	million British thermal units				GJ	British thermal unit
Mt(TNT)	Mt		4.184e15	megatonne		megaton			PJ	TNT equivalent
Mtoe	Mtoe		4.1868e16	megatonne of oil equivalent	megatonnes of oil equivalent				PJ	Tonne of oil equivalent
MtonTNT	Mt		4.184e15	megaton of TNT	megatons of TNT				PJ	TNT equivalent
mtonTNT	~milliton of TNT		4,184,000	milliton of TNT	millitons of TNT				MJ	TNT equivalent
MtTNT	~megatonne of TNT		4.184e15	megatonne of TNT	megatonnes of TNT				PJ	TNT equivalent
mtTNT	~millitonne of TNT		4,184,000	millitonne of TNT	millitonnes of TNT				MJ	TNT equivalent
MW.h	MW⋅h		3,600,000,000	megawatt-hour					GJ	Kilowatt-hour
mW.h	mW⋅h		3.6	milliwatt-hour					J	Kilowatt-hour
MWh	MWh		3,600,000,000	megawatt-hour					GJ	Kilowatt-hour
mWh	mWh		3.6	milliwatt-hour					J	Kilowatt-hour
neV	neV		1.602176487e-28	nanoelectronvolt					yJ	Electronvolt
PeV	PeV		0.0001602176487	petaelectronvolt					mJ	Electronvolt
peV	peV		1.602176487e-31	picoelectronvolt					yJ	Electronvolt
PSh	PSh		2647795.5	Pferdestärkenstunde					kWh	Pferdestärkenstunde
quad	quad		1.054804e18	quadrillion British thermal units	quadrillion British thermal units				EJ	Quad (unit)
Ry	Ry		2.1798741e-18	rydberg					eV	Rydberg constant
scf	scf		2869.2044809344	standard cubic foot	standard cubic feet				kJ	Standard cubic foot
scfoot	scf		2869.2044809344	standard cubic foot	standard cubic foot				kJ	Standard cubic foot
t(TNT)	t		4,184,000,000	tonne		ton			GJ	TNT equivalent
TeV	TeV		1.602176487e-7	teraelectronvolt					μJ	Electronvolt
th	th		4,186,800	thermie					MJ	Conversion of units#Energy
thm-EC	thm (EC)		105,506,000	therm (EC)	therms (EC)				MJ	Therm
thm-UK	thm (UK)		105,505,585.257348	therm (UK)	therms (UK)				MJ	Therm
thm-US	thm (US)	thm (U.S.)	105,480,400	therm (US)	therms (US)	therm (U.S.)	therms (U.S.)		MJ	Therm
toe	toe		41,868,000,000	tonne of oil equivalent	tonnes of oil equivalent				GJ	Tonne of oil equivalent
tonTNT	~ton of TNT		4,184,000,000	ton of TNT	tons of TNT				GJ	TNT equivalent
tTNT	~tonne of TNT		4,184,000,000	tonne of TNT	tonnes of TNT				GJ	TNT equivalent
TtonTNT	~teraton of TNT		4.184e21	teraton of TNT	teratons of TNT				ZJ	TNT equivalent
TtTNT	~teratonne of TNT		4.184e21	teratonne of TNT	teratonnes of TNT				ZJ	TNT equivalent
TW.h	TW⋅h		3.6e15	terawatt-hour					PJ	Kilowatt-hour
TWh	TWh		3.6e15	terawatt-hour					PJ	Kilowatt-hour
W.h	W⋅h		3600	watt-hour					kJ	Kilowatt-hour
Wh	Wh		3600	watt-hour					kJ	Kilowatt-hour
μerg	μerg		1e-13	microerg					nJ	Erg
μeV	μeV		1.602176487e-25	microelectronvolt					yJ	Electronvolt
μW.h	μW⋅h		0.0036	microwatt-hour					mJ	Kilowatt-hour
μWh	μWh		0.0036	microwatt-hour					mJ	Kilowatt-hour
-kW.h	=kW.h	link = Kilowatt hour
btu	=BTU
Calorie	=Cal
ft.lbf	=ftlbf
ft·lbf	=ftlbf
g-cal-15	=cal-15
g-cal-IT	=cal-IT
g-cal-th	=cal-th
g-kcal-15	=kcal-15
g-kcal-IT	=kcal-IT
g-kcal-th	=kcal-th
g-Mcal-15	=Mcal-15
g-mcal-15	=mcal-15
g-Mcal-IT	=Mcal-IT
g-mcal-IT	=mcal-IT
g-Mcal-th	=Mcal-th
g-mcal-th	=mcal-th
GW-h	=GW.h
GW·h	=GW.h
Hartree	=Eh
hp.h	=hph
in.lb-f	=inlb-f
in.lbf	=inlbf
in.oz-f	=inoz-f
in.ozf	=inozf
kbboe	=kBOE	symbol = kbboe
kg-cal-15	=Cal-15
kg-cal-IT	=Cal-IT
kg-cal-th	=Cal-th
kW-h	=kW.h
kW·h	=kW.h
MW-h	=MW.h
mW-h	=mW.h
MW·h	=MW.h
TW-h	=TW.h
uerg	=μerg
ueV	=μeV
uW-h	=μW.h
uW.h	=μW.h
uWh	=μWh
W-h	=W.h

Energy per chemical amount

Unit code	Symbol	US symbol	Scale	Name	Prefix	Default	Link
eVpar	eV		1.602176565e-19 * 6.022140857e23	electronvolt	SI	kcal/mol	Electronvolt
kcal/mol	==kcal/mol	default = kJ/mol	link = Kilocalorie per mole
kJ/mol	==kJ/mol	default = kcal/mol	link = Joule per mole

Energy per unit length

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Default	Link
kWh/100 km	kW⋅h/100 km		36		kilowatt-hour per 100 kilometres	kilowatt-hours per 100 kilometres	kilowatt-hour per 100 kilometers	kilowatt-hours per 100 kilometers	MJ/km kWh/mi	Kilowatt-hour
kWh/100 mi	kW⋅h/100 mi		22.3694		kilowatt-hour per 100 miles	kilowatt-hours per 100 miles			mpge	Miles per gallon gasoline equivalent
MJ/100 km	MJ/100 km		10		megajoule per 100 kilometres	megajoules per 100 kilometres	megajoule per 100 kilometers	megajoules per 100 kilometers	BTU/mi	British thermal unit
mpge	mpg‑e		13e-6	invert	mile per gallon gasoline equivalent	miles per gallon gasoline equivalent			kWh/100 mi	Miles per gallon gasoline equivalent
BTU/mi	==BTU/mi	default = v > 1525 ! M ! k ! J/km
kJ/km	==kJ/km	default = BTU/mi
kWh/km	==-kW.h/km	default = MJ/km kWh/mi
kWh/mi	==-kW.h/mi	default = kWh/km MJ/km
MJ/km	==MJ/km	default = BTU/mi
mpg-e	=mpge

Energy per unit mass

Unit code	Symbol	US symbol	Scale	Name	Plural name	Default	Link
BTU/lb	BTU/lb		(0.947817120/2.20462262)*1000	British thermal unit per pound	British thermal units per pound	kJ/kg	British thermal unit
cal/g	cal/g		4184	calorie per gram	calories per gram	J/g	Calorie per gram
GJ/kg	GJ/kg		1e9	gigajoule per kilogram	gigajoules per kilogram	ktTNT/t	Specific energy
J/g	J/g		1000	joule per gram	joules per gram	kcal/g	Specific energy
kcal/g	kcal/g		4,184,000	kilocalorie per gram	kilocalories per gram	kJ/g	Kilocalorie per gram
kJ/g	kJ/g		1,000,000	kilojoule per gram	kilojoules per gram	kcal/g	Specific energy
kJ/kg	kJ/kg		1000	kilojoule per kilogram	kilojoules per kilogram	BTU/lb	Specific energy
ktonTNT/MT	~kiloton of TNT per metric ton		4,184,000,000	kiloton of TNT per metric ton	kilotons of TNT per metric ton	GJ/kg	TNT equivalent
ktTNT/t	~kilotonne of TNT per tonne		4,184,000,000	kilotonne of TNT per tonne	kilotonnes of TNT per tonne	GJ/kg	TNT equivalent
MtonTNT/MT	~megaton of TNT per metric ton		4.184e12	megaton of TNT per metric ton	megatons of TNT per metric ton	TJ/kg	TNT equivalent
MtTNT/MT	~megatonne of TNT per tonne		4.184e12	megatonne of TNT per tonne	megatonnes of TNT per tonne	TJ/kg	TNT equivalent
TJ/kg	TJ/kg		1e12	terajoule per kilogram	terajoules per kilogram	MtTNT/MT	Specific energy
Cal/g	==Cal/g	default = kJ/g

Energy per unit volume

Unit code	Symbol	US symbol
BTU/cuft	==BTU/cuft	default = kJ/L
Cal/12USoz(mL)serve	==Cal/-12USoz(mL)serve	default = kJ/L
Cal/12USoz(ml)serve	==Cal/-12USoz(ml)serve	default = kJ/l
Cal/12USozserve	==Cal/-12USozserve	default = kJ/L
Cal/USoz	==Cal/USoz	default = kJ/ml
kJ/L	==kJ/L	default = BTU/cuft
kJ/l	==kJ/l	default = BTU/cuft
kJ/ml	==kJ/ml	default = Cal/USoz
MJ/m3	==MJ/m3	default = BTU/cuft

Equivalent radiation dose

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
Sv	Sv		1		sievert				SI	rem	Sievert
rem	rem		0.01		rem				SI	Sv	Roentgen equivalent man

Exhaust emission

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
g/km	g/km	1e-6	gram per kilometre	grams per kilometre	gram per kilometer	grams per kilometer	oz/mi	Exhaust gas
g/mi	g/mi	0.001/1609.344	gram per mile	grams per mile			g/km	Exhaust gas
gCO2/km	g(CO₂)/km	1e-6	gram of CO₂ per kilometre	grams of CO₂ per kilometre	gram of CO₂ per kilometer	grams of CO₂ per kilometer	ozCO2/mi	Exhaust gas
gCO2/mi	g(CO₂)/mi	0.001/1609.344	gram of CO₂ per mile	grams of CO₂ per mile			gCO2/km	Exhaust gas
kg/km	kg/km	0.001	kilogram per kilometre	kilograms per kilometre	kilogram per kilometer	kilograms per kilometer	lb/mi	Exhaust gas
kgCO2/km	kg(CO₂)/km	0.001	kilogram of CO₂ per kilometre	kilograms of CO₂ per kilometre	kilogram of CO₂ per kilometer	kilograms of CO₂ per kilometer	lbCO2/mi	Exhaust gas
lb/mi	lb/mi	0.45359237/1609.344	pound per mile	pounds per mile			kg/km	Exhaust gas
lbCO2/mi	lb(CO₂)/mi	0.45359237/1609.344	pound of CO₂ per mile	pounds of CO₂ per mile			kgCO2/km	Exhaust gas
oz/mi	oz/mi	0.028349523125/1609.344	ounce per mile	ounces per mile			g/km	Exhaust gas
ozCO2/mi	oz(CO₂)/mi	0.028349523125/1609.344	ounce of CO₂ per mile	ounces of CO₂ per mile			gCO2/km	Exhaust gas

Flow

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
cuft/a	cu ft/a	28316846592e-12/31,557,600	cubic foot per annum	cubic feet per annum			m3/a	Cubic foot per second
cuft/d	cu ft/d	28316846592e-12/86400	cubic foot per day	cubic feet per day			m3/d	Cubic foot per second
cuft/h	cu ft/h	28316846592e-12/3600	cubic foot per hour	cubic feet per hour			m3/h	Cubic foot per second
cuft/min	cu ft/min	28316846592e-12/60	cubic foot per minute	cubic feet per minute			m3/min	Cubic foot per minute
cuft/s	cu ft/s	28316846592e-12	cubic foot per second	cubic feet per second			m3/s	Cubic foot per second
cumi/a	cu mi/a	4168181825440579584e-9/31,557,600	cubic mile per annum	cubic miles per annum			km3/a	Cubic foot per second
cuyd/h	cuyd/h	0.9144^3/3600	cubic yard per hour	cubic yards per hour			m3/h	Cubic foot per second
cuyd/s	cu yd/s	0.9144^3	cubic yard per second	cubic yards per second			m3/s	Cubic yard per second
Goilbbl/a	Gbbl/a	22081.56874/4383	billion barrels per year	billion barrels per year			v * 1.58987294928 < 10 ! e6 ! e9 ! m3/a	Barrel per day
impgal/h	imp gal/h	0.00454609/3600	imperial gallon per hour	imperial gallons per hour			m3/h	Gallon
impgal/min	imp gal/min	0.00454609/60	imperial gallon per minute	imperial gallons per minute			m3/s	Gallon
impgal/s	impgal/s	0.00454609	imperial gallon per second	imperial gallons per second			m3/s	Imperial gallons per second
km3/a	km³/a	1e9/31,557,600	cubic kilometre per annum	cubic kilometres per annum	cubic kilometer per annum	cubic kilometers per annum	cumi/a	Cubic metre per second
km3/d	km³/d	1e9/86,400	cubic kilometre per day	cubic kilometres per day	cubic kilometer per day	cubic kilometers per day	cuft/d	Cubic metre per second
koilbbl/a	kbbl/a	1.104078437/219,150	thousand barrels per year	thousand barrels per year			v * 1.58987294928 < 10 ! ! e3 ! m3/a	Barrel per day
koilbbl/d	kbbl/d	5.520392185/3000	thousand barrels per day	thousand barrels per day			v * 1.58987294928 < 10 ! ! e3 ! m3/d	Barrel per day
L/h	L/h	0.001/3600	litre per hour	litres per hour	liter per hour	liters per hour	impgal/h USgal/h	Cubic metre per second
L/min	L/min	0.001/60	litre per minute	litres per minute	liter per minute	liters per minute	impgal/min USgal/min	Cubic metre per second
L/s	L/s	0.001	litre per second	litres per second	liter per second	liters per second	cuft/s	Cubic metre per second
m3/a	m³/a	1/31,557,600	cubic metre per annum	cubic metres per annum	cubic meter per annum	cubic meters per annum	cuft/a	Cubic metre per second
m3/d	m³/d	1/86400	cubic metre per day	cubic metres per day	cubic meter per day	cubic meters per day	cuft/d	Cubic metre per second
m3/h	m³/h	1/3600	cubic metre per hour	cubic metres per hour	cubic meter per hour	cubic meters per hour	cuft/h	Cubic metre per second
m3/min	m³/min	1/60	cubic metre per minute	cubic metres per minute	cubic meter per minute	cubic meters per minute	cuft/min	Cubic metre per second
m3/s	m³/s	1	cubic metre per second	cubic metres per second	cubic meter per second	cubic meters per second	cuft/s	Cubic metre per second
Moilbbl/a	Mbbl/a	22.08156874/4383	million barrels per year	million barrels per year			v * 1.58987294928 < 10 ! e3 ! e6 ! m3/a	Barrel per day
Moilbbl/d	Mbbl/d	5.520392185/3	million barrels per day	million barrels per day			v * 1.58987294928 < 10 ! e3 ! e6 ! m3/d	Barrel per day
oilbbl/a	bbl/a	1.104078437/219,150,000	barrel per year	barrels per year			m3/a	Barrel per day
oilbbl/d	bbl/d	5.520392185/3,000,000	barrel per day	barrels per day			m3/d	Barrel per day
Toilbbl/a	Tbbl/a	22,081,568.74/4383	trillion barrels per year	trillion barrels per year			v * 1.58987294928 < 10 ! e9 ! e12 ! m3/a	Barrel per day
U.S.gal/d	U.S. gal/d	0.003785411784/86400	U.S. gallon per day	U.S. gallons per day			m3/s	+U.S. gallon per day
U.S.gal/h	gal/h	0.003785411784/3600	gallon per hour	gallons per hour			m3/h	*Gallon
U.S.gal/min	U.S. gal/min	0.003785411784/60	U.S. gallon per minute	U.S. gallons per minute			m3/s	Gallon
USgal/a	US gal/a	0.003785411784/31,557,600	US gallon per year	US gallons per year			m3/s	US gallon per year
USgal/d	US gal/d	0.003785411784/86400	US gallon per day	US gallons per day			m3/s	US gallon per day
USgal/h	gal/h	0.003785411784/3600	gallon per hour	gallons per hour			m3/h	+Gallon
USgal/min	US gal/min	0.003785411784/60	US gallon per minute	US gallons per minute			m3/s	Gallon
USgal/s	USgal/s	0.003785411784	US gallon per second	US gallons per second	U.S. gallon per second	U.S. gallons per second	m3/s	US gallons per second
ft3/a	=cuft/a
ft3/d	=cuft/d
ft3/h	=cuft/h
ft3/s	=cuft/s
Gcuft/a	=e9cuft/a
Gcuft/d	=e9cuft/d
kcuft/a	=e3cuft/a
kcuft/d	=e3cuft/d
kcuft/s	=e3cuft/s
Mcuft/a	=e6cuft/a
Mcuft/d	=e6cuft/d
Mcuft/s	=e6cuft/s
m³/s	=m3/s
Tcuft/a	=e12cuft/a
Tcuft/d	=e12cuft/d
u.s.gal/min	=U.S.gal/min
usgal/min	=USgal/min

Force

Unit code	Symbol	Scale	Name	Plural name	Prefix	Default	Link
-LTf	LTf	9964.01641818352	long ton-force	long tons-force		kN	Long ton-force
-STf	STf	8896.443230521	short ton-force	short tons-force		kN	Short ton-force
dyn	dyn	0.00001	dyne			gr-f	Dyne
g-f	g_f	0.00980665	gram-force	grams-force		mN oz-f	Kilogram-force
gf	gf	0.00980665	gram-force	grams-force		mN ozf	Kilogram-force
gr-f	gr_f	0.0006354602307515	grain-force	grains-force		μN	Pound (force)
grf	grf	0.0006354602307515	grain-force	grains-force		μN	Pound (force)
kdyn	kdyn	0.01	kilodyne			oz-f	Dyne
kg-f	kg_f	9.80665	kilogram-force	kilograms-force		N lb-f	Kilogram-force
kgf	kgf	9.80665	kilogram-force	kilograms-force		N lbf	Kilogram-force
kp	kp	9.80665	kilopond			N lb-f	Kilogram-force
L/T-f	L/T_f	9964.01641818352	long ton-force	long tons-force		kN	Long ton-force
L/Tf	L/Tf	9964.01641818352	long ton-force	long tons-force		kN	Long ton-force
lb-f	lb_f	4.4482216152605	pound-force	pounds-force		N	Pound (force)
lbf	lbf	4.4482216152605	pound-force	pounds-force		N	Pound (force)
lb(f)	lb	4.4482216152605	pound			N	Pound (force)
LT-f	LT_f	9964.01641818352	long ton-force	long tons-force		kN	Long ton-force
LTf	~LTf	9964.01641818352	long ton-force	long tons-force		kN	Long ton-force
Mdyn	Mdyn	10	megadyne			lb-f	Dyne
mdyn	mdyn	0.00000001	millidyne			gr-f	Dyne
mg-f	mg_f	0.00000980665	milligram-force	milligrams-force		μN gr-f	Kilogram-force
mgf	mgf	0.00000980665	milligram-force	milligrams-force		μN grf	Kilogram-force
Mp	Mp	9806.65	megapond			kN LT-f ST-f	Kilogram-force
mp	mp	0.00000980665	millipond			μN gr-f	Kilogram-force
N	N	1	newton		SI	lb-f	Newton (unit)
oz-f	oz_f	0.2780138203095378125	ounce-force	ounces-force		mN	Pound (force)
ozf	ozf	0.2780138203095378125	ounce-force	ounces-force		mN	Pound (force)
p	p	0.00980665	pond			mN oz-f	Kilogram-force
pdl	pdl	0.138254954376	poundal			N	Poundal
S/T-f	S/T_f	8896.443230521	short ton-force	short tons-force		kN	Short ton-force
S/Tf	S/Tf	8896.443230521	short ton-force	short tons-force		kN	Short ton-force
ST-f	ST_f	8896.443230521	short ton-force	short tons-force		kN	Short ton-force
STf	~STf	8896.443230521	short ton-force	short tons-force		kN	Short ton-force
t-f	t_f	9806.65	tonne-force	tonnes-force		kN LT-f ST-f	Ton-force#Tonne-force
tf	tf	9806.65	tonne-force	tonnes-force		kN LTf STf	Ton-force#Tonne-force
dyne	=dyn
newtons	=N
poundal	=pdl
tonne-force	=tf

Fuel efficiency

Unit code	Symbol	US symbol	Scale	Extra
impgal/mi	==@impgal/mi	default = l/km USgal/mi
km/L	==km/L	default = mpgimp mpgus
km/l	==km/l	default = mpgimp mpgus
L/100 km	==L/100km	default = mpgimp mpgus	symlink = Fuel economy in automobiles#Units of measure\|L/100 km
l/100 km	==l/100km	default = mpgimp mpgus	symlink = Fuel economy in automobiles#Units of measure\|l/100 km
L/km	==L/km	default = mpgimp mpgus
l/km	==l/km	default = mpgimp mpgus
mi/impqt	==mi/impqt	default = km/L
mi/U.S.qt	==mi/U.S.qt	default = km/L
mi/USqt	==mi/USqt	default = km/L
mi/usqt	==mi/usqt	default = km/L
mpgimp	==mi/@impgal	default = L/100 km+mpgus	symbol = mpg_‑imp	symlink = Fuel economy in automobiles#Units of measure\|mpg_{‑[[Imperial units\|imp]]}
mpgus	==mi/+USgal	default = L/100 km+mpgimp	symbol = mpg_‑US	symlink = Fuel economy in automobiles#Units of measure\|mpg_{‑[[United States customary units\|US]]}
U.S.gal/mi	==*U.S.gal/mi	sp=us	default = l/km impgal/mi
usgal/mi	==+USgal/mi	default = l/km impgal/mi
L/100km	=L/100 km
l/100km	=l/100 km
mpg	!Use %{mpgus%} for miles per US gallon or %{mpgimp%} for miles per imperial gallon (not %{mpg%})
mpgU.S.	=mpgus	sp=us	symbol = mpg_‑U.S.	symlink = Fuel economy in automobiles#Units of measure\|mpg_{‑[[United States customary units\|U.S.]]}
mpgu.s.	=mpgus	sp=us	symbol = mpg_‑U.S.	symlink = Fuel economy in automobiles#Units of measure\|mpg_{‑[[United States customary units\|U.S.]]}
mpgUS	=mpgus
USgal/mi	=usgal/mi

Fracture gradient

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
kPa/m	==kPa/-m-frac	default = psi/ft
psi/ft	==psi/-ft-frac	default = kPa/m

Gradient

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
cm/km	cm/km	0.00001	centimetre per kilometre	centimetres per kilometre	centimeter per kilometer	centimeters per kilometer	ft/mi	Grade (slope)
ft/mi	ft/mi	1/5280	foot per mile	feet per mile			v < 5.28 ! c ! ! m/km	Grade (slope)
ft/nmi	ft/nmi	1.524/9260	foot per nautical mile	feet per nautical mile			v < 6.076 ! c ! ! m/km	Grade (slope)
in/ft	in/ft	1/12	inch per foot	inches per foot			mm/m	Grade (slope)
in/mi	in/mi	1/63360	inch per mile	inches per mile			v < 0.6336 ! m ! c ! m/km	Grade (slope)
m/km	m/km	0.001	metre per kilometre	metres per kilometre	meter per kilometer	meters per kilometer	ft/mi	Grade (slope)
mm/km	mm/km	0.000001	millimetre per kilometre	millimetres per kilometre	millimeter per kilometer	millimeters per kilometer	in/mi	Grade (slope)
mm/m	mm/m	0.001	millimetre per metre	millimetres per metre	millimeter per meter	millimeters per meter	in/ft	Grade (slope)

Length

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	Prefix	Default	Link
admi	nmi (admiralty)		1853.184		admiralty mile				km mi	Nautical mile
AU	AU		149,597,870,700		astronomical unit				km mi	Astronomical unit
Brnmi	(Brit) nmi		1853.184		British nautical mile				km mi	Nautical mile
bu	~bu		1/330		bu	bu			mm	Japanese units of measurement#Length
ch	ch		20.1168		chain				ft m	Chain (unit)
chlk	[[Chain (unit)\|ch]]		20.1168		[[Chain (unit)\|chain]]				ft m
chain	~chain		20.1168		chain				ft m	Chain (unit)
chainlk	~[[Chain (unit)\|chain]]		20.1168		[[Chain (unit)\|chain]]				ft m
dpcm	dot/cm		1/0.01	invert	dot/cm	dot/cm			dpi	Dots per inch
dpi	DPI		1/0.0254	invert	DPI	DPI			pitch	Dots per inch
fathom	~fathom		1.8288		fathom				ft m	Fathom
foot	ft		0.3048		foot	foot			m	Foot (unit)
ft	ft		0.3048		foot	feet			m	Foot (unit)
furlong	~furlong		201.168		furlong				ft m	Furlong
Gly	Gly		9.4607304725808e24		gigalight-year				Mpc	Light-year#Definitions
Gpc	Gpc		3.0856775814671916e25		gigaparsec				Gly	Parsec#Megaparsecs and gigaparsecs
hand	h		0.1016	hand	hand				in cm	Hand (unit)
in	in		0.0254		inch	inches			mm	Inch
inabbreviated	in		0.0254		in	in			mm	Inch
kly	kly		9.4607304725808e18		kilolight-year				pc	Light-year#Definitions
kpc	kpc		3.0856775814671916e19		kiloparsec				kly	Parsec#Parsecs and kiloparsecs
LD	LD		384,403,000		lunar distance				km mi	Lunar distance (astronomy)
league	~league		4828.032		league				km	League (unit)
ly	ly		9.4607304725808e15		light-year				AU	Light-year
m	m		1		metre		meter	SI	v > 0 and v < 3 ! ftin ! ft	Metre
mi	mi		1609.344		mile				km	Mile
mil	~mil		0.0000254		mil				mm	Thousandth of an inch
Mly	Mly		9.4607304725808e21		megalight-year				kpc	Light-year#Definitions
Mpc	Mpc		3.0856775814671916e22		megaparsec				Mly	Parsec#Megaparsecs and gigaparsecs
NM	NM		1852		nautical mile				km mi	Nautical mile
nmi	nmi		1852		nautical mile				km mi	Nautical mile
oldUKnmi	nmi		1853.184		nautical mile				km mi	Nautical mile
oldUSnmi	nmi		1853.24496		nautical mile				km mi	Nautical mile
pc	pc		3.0856775814671916e16		parsec				ly	Parsec
perch	~perch		5.0292		perch	perches			ft m	Rod (unit)
pitch	*μm		1e-6		μm	μm			dpi	Dots per inch
pole	~pole		5.0292		pole				ft m	Rod (unit)
pre1954U.S.nmi	(pre‑1954 U.S.) nmi		1853.24496		(pre-1954 U.S.) nautical mile				km mi	Nautical mile
pre1954USnmi	(pre‑1954 US) nmi	(pre‑1954 U.S.) nmi	1853.24496		(pre-1954 US) nautical mile		(pre-1954 U.S.) nautical mile		km mi	Nautical mile
rd	rd		5.0292		rod				ft m	Rod (unit)
royal cubit	cu		0.524		royal cubit				mm	Royal cubit
rtkm	km		1000		route kilometre		route kilometer		mi	Kilometre
rtmi	mi		1609.344		route mile				km	Mile
shaku	~shaku		10/33		shaku	shaku			m	Shaku (unit)
sm	sm		1.70180		smoot				m	Smoot (unit)
smi	mi		1609.344		statute mile				km	Statute mile
solar radius	R_☉		695700e3		solar radius	solar radii			km	Solar radius
sun	~sun		1/33		sun	sun			mm	Japanese units of measurement#Length
thou	~thou		0.0000254		thou	thou			mm	Thousandth of an inch
verst	~verst		1066.8		verst				km mi	Verst
yd	yd		0.9144		yard				m	Yard
μin	μin		0.0000000254		microinch	microinches			nm	SI prefix#Non-metric units
Å	Å		0.0000000001		ångström				in	Ångström
Hz	Hz		1/299,792,458	invert	hertz	hertz		SI	m	Hertz
rpm	rpm		1/(60*299,792,458)	invert	revolution per minute	revolutions per minute			Hz	Revolutions per minute
-ft-frac	=ft	link = Fracture gradient
-in-stiff	=in	link = Stiffness
-m-frac	=m	link = Fracture gradient
-m-stiff	=m	link = Stiffness
100km	=km	multiplier = 100
100mi	=mi	multiplier = 100
100miles	=mi	multiplier = 100	symbol = miles
admiralty nmi	=oldUKnmi
angstrom	=Å
au	=AU	symbol = au
feet	=ft
hands	=hand
inch	=in
light-year	=ly
meter	=m	sp=us
meters	=m	sp=us
metre	=m
metres	=m
micrometre	=μm
micron	=μm	default = μin
mile	=mi
miles	=mi
parsec	=pc
rod	=rd
smoot	=sm
uin	=μin
yard	=yd
yards	=yd
yds	=yd

Linear density

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
dtex	dtex	1e-7	decitex	decitex			lb/yd	Units of textile measurement#Units
kg/cm	kg/cm	100	kilogram per centimetre	kilograms per centimetre	kilogram per centimeter	kilograms per centimeter	lb/yd	Linear density
kg/m	kg/m	1	kilogram per metre	kilograms per metre	kilogram per meter	kilograms per meter	lb/yd	Linear density
lb/ft	lb/ft	4535.9237/3048	pound per foot	pounds per foot			kg/m	Linear density
lb/yd	lb/yd	4535.9237/9144	pound per yard	pounds per yard			kg/m	Linear density

Magnetic field strength

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
G	G		0.0001		gauss	gauss			SI	T	Gauss (unit)
T	T		1		tesla				SI	G	Tesla (unit)

Magnetizing field

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Prefix	Default	Link
A/m	A/m	1	ampere per metre	amperes per metre	ampere per meter	amperes per meter		Oe	Ampere per metre
kA/m	kA/m	1000	kiloampere per metre	kiloamperes per metre	kiloampere per meter	kiloamperes per meter		kOe	Ampere per metre
MA/m	MA/m	1e6	megaampere per metre	megaamperes per metre	megaampere per meter	megaamperes per meter		kOe	Ampere per metre
Oe	Oe	79.5774715	oersted				SI	kA/m	Oersted

Mass

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Prefix	Default	Link
-Lcwt	cwt	50.80234544	hundredweight	hundredweight				lb	Hundredweight
-Scwt	cwt	45.359237	hundredweight	hundredweight				lb	Hundredweight
-ST	ST	907.18474	short ton					t	Short ton
carat	~carat	0.0002	carat					g	Carat (mass)
drachm	~drachm	0.001771845195	drachm		dram			g	Dram (unit)
dram	=drachm
dwt	dwt	0.00155517384	pennyweight					oz g	Pennyweight
DWton	~deadweight ton	1016.0469088	deadweight ton					DWtonne	Deadweight tonnage
DWtonne	~deadweight tonne	1000	deadweight tonne					DWton	Deadweight tonnage
g	g	0.001	gram				SI	oz	Gram
gr	gr	0.00006479891	grain					g	Grain (unit)
Gt	Gt	1000000000000	gigatonne					LT ST	Tonne
impgalh2o	imp gal H₂O	10.00/2.2046226218488	imperial gallon of water	imperial gallons of water				lb kg	Imperial gallon
kt	kt	1000000	kilotonne					LT ST	Tonne
lb	lb	0.45359237	pound					kg	Pound (mass)
Lcwt	~Lcwt	50.80234544	long hundredweight	long hundredweight				lb	Hundredweight
long cwt	long cwt	50.80234544	long hundredweight	long hundredweight				lb kg	Hundredweight
long qtr	long qtr	12.70058636	long quarter					lb kg	Long quarter
LT	~long ton	1016.0469088	long ton					t	Long ton
lt	LT	1016.0469088	long ton					t	Long ton
metric ton	~metric ton	1000	metric ton					long ton	Tonne
MT	t	1000	metric ton					LT ST	Tonne
Mt	Mt	1000000000	megatonne					LT ST	Tonne
oz	oz	0.028349523125	ounce					g	Ounce
ozt	ozt	0.0311034768	troy ounce					oz g	Troy ounce
pdr	pdr	0.45359237	pounder					kg	Pound (mass)
qtr	qtr	12.70058636	quarter					lb kg	Long quarter
Scwt	~Scwt	45.359237	short hundredweight	short hundredweight				lb	Hundredweight
short cwt	short cwt	45.359237	short hundredweight	short hundredweight				lb kg	Hundredweight
short qtr	short qtr	11.33980925	short quarter					lb kg	Short quarter
ST	~short ton	907.18474	short ton					t	Short ton
shtn	sh tn	907.18474	short ton					t	Short ton
shton	~ton	907.18474	ton					t	Ton
solar mass	M_☉	1.98855e30	solar mass	solar masses				kg	Solar mass
st	st	6.35029318	stone	stone				lb kg	Stone (unit)
t	t	1000	tonne		metric ton			LT ST	Tonne
tonne	t	1000	tonne		metric ton			shton	Tonne
troy pound	~troy pound	0.3732417216	troy pound					lb kg	Troy weight
usgalh2o	US gal H₂O	3.785411784/1.00206219713184	US gallon of water	US gallons of water	U.S. gallon of water	U.S. gallons of water		lb kg	United States customary units#Fluid volume
viss	viss	1.632932532	viss	viss				kg	Myanmar units of measurement#Mass
billion tonne	=e9t
kilogram	=kg
kilotonne	=kt
lbs	=lb
lbt	=troy pound
lcwt	=Lcwt
long ton	=LT
mcg	=μg
million tonne	=e6t
scwt	=Scwt
short ton	=ST
stone	=st
thousand tonne	=e3t
tonnes	=t

Mass per unit power

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
kg/kW	kg/kW		0.001		kilogram per kilowatt	kilograms per kilowatt				lb/hp	Kilowatt
lb/hp	lb/hp		1/(83.82*19.6133)		pound per horsepower	pounds per horsepower				kg/kW	Horsepower

Mass per unit time

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
kg/h	==kg/h	default = lb/h
lb/h	==lb/h	default = kg/h

Molar rate

Unit code	Symbol	Scale	Name	Plural name	Default	Link
g-mol/d	g‑mol/d	1/86400	gram-mole per day	gram-moles per day	μmol/s	Mole (unit)
g-mol/h	g‑mol/h	1/3600	gram-mole per hour	gram-moles per hour	mmol/s	Mole (unit)
g-mol/min	g‑mol/min	1/60	gram-mole per minute	gram-moles per minute	g-mol/s	Mole (unit)
g-mol/s	g‑mol/s	1	gram-mole per second	gram-moles per second	lb-mol/min	Mole (unit)
gmol/d	gmol/d	1/86400	gram-mole per day	gram-moles per day	μmol/s	Mole (unit)
gmol/h	gmol/h	1/3600	gram-mole per hour	gram-moles per hour	mmol/s	Mole (unit)
gmol/min	gmol/min	1/60	gram-mole per minute	gram-moles per minute	gmol/s	Mole (unit)
gmol/s	gmol/s	1	gram-mole per second	gram-moles per second	lbmol/min	Mole (unit)
kmol/d	kmol/d	5/432	kilomole per day	kilomoles per day	mmol/s	Mole (unit)
kmol/h	kmol/h	5/18	kilomole per hour	kilomoles per hour	mol/s	Mole (unit)
kmol/min	kmol/min	50/3	kilomole per minute	kilomoles per minute	mol/s	Kilomole (unit)
kmol/s	kmol/s	1000	kilomole per second	kilomoles per second	lb-mol/s	Mole (unit)
lb-mol/d	lb‑mol/d	4.5359237/864	pound-mole per day	pound-moles per day	mmol/s	Pound-mole
lb-mol/h	lb‑mol/h	4.5359237/36	pound-mole per hour	pound-moles per hour	mol/s	Pound-mole
lb-mol/min	lb‑mol/min	45.359237/6	pound-mole per minute	pound-moles per minute	mol/s	Pound-mole
lb-mol/s	lb‑mol/s	453.59237	pound-mole per second	pound-moles per second	kmol/s	Pound-mole
lbmol/d	lbmol/d	4.5359237/864	pound-mole per day	pound-moles per day	mmol/s	Pound-mole
lbmol/h	lbmol/h	4.5359237/36	pound-mole per hour	pound-moles per hour	mol/s	Pound-mole
lbmol/min	lbmol/min	45.359237/6	pound-mole per minute	pound-moles per minute	mol/s	Pound-mole
lbmol/s	lbmol/s	453.59237	pound-mole per second	pound-moles per second	kmol/s	Pound-mole
mmol/s	mmol/s	0.001	millimole per second	millimoles per second	lb-mol/d	Mole (unit)
mol/d	mol/d	1/86400	mole per day	moles per day	μmol/s	Mole (unit)
mol/h	mol/h	1/3600	mole per hour	moles per hour	mmol/s	Mole (unit)
mol/min	mol/min	1/60	mole per minute	moles per minute	mol/s	Mole (unit)
mol/s	mol/s	1	mole per second	moles per second	lb-mol/min	Mole (unit)
μmol/s	μmol/s	0.000001	micromole per second	micromoles per second	lb-mol/d	Mole (unit)
umol/s	=μmol/s

Per unit area

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
/acre	/acre	1/4046.8564224	per acre	per acre			/ha	Acre
/ha	/ha	100e-6	per hectare	per hectare			/acre	Hectare
/sqcm	/cm²	1e4	per square centimetre	per square centimetre	per square centimeter	per square centimeter	/sqin	Square centimetre
/sqin	/in²	1/0.00064516	per square inch	per square inch			/sqcm	Square inch
/sqkm	/km²	1e-6	per square kilometre	per square kilometre	per square kilometer	per square kilometer	/sqmi	Square kilometre
/sqmi	/sq mi	1/2,589,988.110336	per square mile	per square mile			/sqkm	Square mile
PD/acre	/acre	1/4046.8564224	inhabitant per acre	inhabitants per acre			PD/ha	Acre
PD/ha	/ha	100e-6	inhabitant per hectare	inhabitants per hectare			PD/acre	Hectare
PD/sqkm	/km²	1e-6	inhabitant per square kilometre	inhabitants per square kilometre	inhabitant per square kilometer	inhabitants per square kilometer	PD/sqmi	Square kilometre
PD/sqmi	/sq mi	1/2,589,988.110336	inhabitant per square mile	inhabitants per square mile			PD/sqkm	Square mile
/cm2	=/sqcm
/in2	=/sqin
/km2	=/sqkm
pd/acre	=PD/acre
pd/ha	=PD/ha
PD/km2	=PD/sqkm
pd/km2	=PD/sqkm
PD/km²	=PD/sqkm
pd/sqkm	=PD/sqkm
pd/sqmi	=PD/sqmi

Per unit volume

Unit code	Symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
/l	/l	1000	per litre	per litre	per liter	per liter	/usgal	Litre
/USgal	/gal	264.172052	per gallon	per gallon			/l	*US gallon
/usgal	=/USgal

Power

Unit code	Symbol	US symbol	Scale	Name	Plural name	Prefix	Default	Link
bhp	bhp		745.69987158227022	brake horsepower	brake horsepower		kW	Horsepower#Brake horsepower
Cal/d	Cal/d		4184/(3600*24)	large calorie per day	large calories per day		kJ/d	Calorie
Cal/h	Cal/h		4184/3600	large calorie per hour	large calories per hour		kJ/h	Calorie
cal/h	cal/h		4.184/3600	calorie per hour	calories per hour		W	Calorie
CV	CV		735.49875	metric horsepower	metric horsepower		kW	Metric horsepower
hk	hk		735.49875	metric horsepower	metric horsepower		kW	Metric horsepower
hp	hp		745.69987158227022	horsepower	horsepower		kW	Horsepower
hp-electric	hp		746	electric horsepower	electric horsepower		kW	Horsepower#Electrical horsepower
hp-electrical	hp		746	electrical horsepower	electrical horsepower		kW	Horsepower#Electrical horsepower
hp-metric	hp		735.49875	metric horsepower	metric horsepower		kW	Metric horsepower
ihp	ihp		745.69987158227022	indicated horsepower	indicated horsepower		kW	Horsepower#Indicated horsepower
kcal/h	kcal/h		4184/3600	kilocalorie per hour	kilocalories per hour		kW	Calorie
kJ/d	kJ/d		1000/(3600*24)	kilojoule per day	kilojoules per day		Cal/d	Kilojoule
kJ/h	kJ/h		1000/3600	kilojoule per hour	kilojoules per hour		W	Kilojoule
PS	PS		735.49875	metric horsepower	metric horsepower		kW	Metric horsepower
shp	shp		745.69987158227022	shaft horsepower	shaft horsepower		kW	Horsepower#Shaft horsepower
W	W		1	watt		SI	hp	Watt
BTU/h	==BTU/h	default = W
Btu/h	==Btu/h	default = W
BHP	=bhp
btu/h	=BTU/h
HP	=hp
Hp	=hp
hp-mechanical	=hp
IHP	=ihp
SHP	=shp
whp	=hp

Power per unit mass

Unit code	Symbol	US symbol	Scale	Name	Plural name	Default	Link
hp/lb	hp/lb		1643.986806	horsepower per pound	horsepower per pound	kW/kg	Power-to-weight ratio
hp/LT	hp/LT		5.13745876875/7	horsepower per long ton	horsepower per long ton	kW/t	Power-to-weight ratio
hp/ST	hp/ST		0.821993403	horsepower per short ton	horsepower per short ton	kW/t	Power-to-weight ratio
hp/t	hp/t		0.74569987158227022	horsepower per tonne	horsepower per tonne	kW/t	Power-to-weight ratio
kW/kg	kW/kg		1000	kilowatt per kilogram	kilowatts per kilogram	hp/lb	Power-to-weight ratio
kW/t	kW/t		1	kilowatt per tonne	kilowatts per tonne	PS/t	Power-to-weight ratio
PS/t	PS/t		0.73549875	metric horsepower per tonne	metric horsepower per tonne	kW/t	Power-to-weight ratio
shp/lb	shp/lb		1643.986806	shaft horsepower per pound	shaft horsepower per pound	kW/kg	Power-to-weight ratio
hp/tonne	=hp/t	default = kW/tonne	symbol = hp/tonne
kW/tonne	=kW/t	symbol = kW/tonne

Pressure

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	US plural name	Prefix	Default	Link
-lb/in2	lb/in²		444,822,161.52605/64,516	pound per square inch	pounds per square inch				kPa kgf/cm2	Pound per square inch
atm	atm		101,325	standard atmosphere					kPa	Atmosphere (unit)
Ba	Ba		0.1	barye					Pa	Barye
bar	bar		100,000	bar					kPa	Bar (unit)
dbar	dbar		10,000	decibar					kPa	Bar (unit)
inHg	inHg		3386.388640341	inch of mercury	inches of mercury				kPa	Inch of mercury
kBa	kBa		100	kilobarye					hPa	Barye
kg-f/cm2	kg_f/cm²		98,066.5	kilogram-force per square centimetre	kilograms-force per square centimetre	kilogram-force per square centimeter	kilograms-force per square centimeter		psi	Kilogram-force
kg/cm2	kg/cm²		98,066.5	kilogram per square centimetre	kilograms per square centimetre	kilogram per square centimeter	kilograms per square centimeter		psi	Kilogram-force
kgf/cm2	kgf/cm²		98,066.5	kilogram-force per square centimetre	kilograms-force per square centimetre	kilogram-force per square centimeter	kilograms-force per square centimeter		psi	Kilogram-force
ksi	ksi		444,822,161,526.05/64,516	kilopound per square inch	kilopounds per square inch				MPa	Pound per square inch
lbf/in2	lbf/in²		444,822,161.52605/64,516	pound-force per square inch	pounds-force per square inch				kPa kgf/cm2	Pound-force per square inch
mb	mb		100	millibar					hPa	Bar (unit)
mbar	mbar		100	millibar					hPa	Bar (unit)
mmHg	mmHg		133.322387415	millimetre of mercury	millimetres of mercury	millimeter of mercury	millimeters of mercury		kPa	Millimetre of mercury
Pa	Pa		1	pascal				SI	psi	Pascal (unit)
psf	psf		444,822,161.52605/9,290,304	pound per square foot	pounds per square foot				kPa	Pound per square inch
psi	psi		444,822,161.52605/64,516	pound per square inch	pounds per square inch				kPa	Pound per square inch
Torr	Torr		20,265/152	torr					kPa	Torr
N/cm2	==N/cm2	default = psi
N/m2	==N/m2	default = psi
g/cm2	==g/cm2	default = lb/sqft	multiplier = 9.80665
g/m2	==g/m2	default = lb/sqft	multiplier = 9.80665
kg/ha	==kg/ha	default = lb/acre	multiplier = 9.80665
kg/m2	==kg/m2	default = lb/sqft	multiplier = 9.80665
lb/1000sqft	==lb/1000sqft	default = g/m2	multiplier = 9.80665
lb/acre	==lb/acre	default = kg/ha	multiplier = 9.80665
lb/sqft	==lb/sqft	default = kg/m2	multiplier = 9.80665
lb/sqyd	==lb/sqyd	default = kg/m2	multiplier = 9.80665
LT/acre	==LT/acre	default = t/ha	multiplier = 9.80665
MT/ha	==MT/ha	default = LT/acre ST/acre	multiplier = 9.80665
oz/sqft	==oz/sqft	default = g/m2	multiplier = 9.80665
oz/sqyd	==oz/sqyd	default = g/m2	multiplier = 9.80665
ST/acre	==ST/acre	default = t/ha	multiplier = 9.80665
t/ha	==t/ha	default = LT/acre ST/acre	multiplier = 9.80665
tonne/acre	==tonne/acre	default = tonne/ha	multiplier = 9.80665
tonne/ha	==tonne/ha	default = tonne/acre	multiplier = 9.80665
kgfpsqcm	=kgf/cm2
kgpsqcm	=kg/cm2
kN/m2	=kPa
lb/in2	=lbf/in2
torr	=Torr

Radioactivity

Unit code	Symbol	Scale	Name	Prefix	Default	Link
Bq	Bq	1	becquerel	SI	pCi	Becquerel
Ci	Ci	3.7e10	curie	SI	GBq	Curie (unit)
Rd	Rd	1e6	rutherford	SI	MBq	Rutherford (unit)

Speed

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Default	Link
cm/h	cm/h		0.01/60/60		centimetre per hour	centimetres per hour	centimeter per hour	centimeters per hour	in/h	Metre per second
cm/s	cm/s		0.01		centimetre per second	centimetres per second	centimeter per second	centimeters per second	in/s	Metre per second
cm/year	cm/year		0.01/365.2425/24/60/60		centimetre per year	centimetres per year	centimeter per year	centimeters per year	in/year	Orders of magnitude (speed)
foot/s	ft/s		0.3048		foot per second	foot per second			m/s	Foot per second
ft/min	ft/min		0.00508		foot per minute	feet per minute			m/min	Feet per second
ft/s	ft/s		0.3048		foot per second	feet per second			m/s	Feet per second
furlong per fortnight	~furlong per fortnight		1.397/8,400		furlong per fortnight	furlongs per fortnight			km/h mph	FFF system
in/h	in/h		0.0254/60/60		inch per hour	inches per hour			cm/h	Inch
in/s	in/s		0.0254		inch per second	inches per second			cm/s	Inch
in/year	in/year		0.0254/365.2425/24/60/60		inch per year	inches per year			cm/year	Orders of magnitude (speed)
isp	s		9.80665		second				km/s	Specific impulse
km/d	km/d		1.1574074074074074e-2		kilometre per day	kilometres per day	kilometer per day	kilometers per day	mi/d	Orders of magnitude (speed)
km/h	km/h		10/36		kilometre per hour	kilometres per hour	kilometer per hour	kilometers per hour	mph	Kilometres per hour
km/s	km/s		1000		kilometre per second	kilometres per second	kilometer per second	kilometers per second	mi/s	Metre per second
kn	kn		4.63/9		knot				km/h mph	Knot (unit)
kNs/kg	kN‑s/kg		1000		kN‑s/kg	kN‑s/kg			isp	Specific impulse
m/min	m/min		1/60		metre per minute	metres per minute	meter per minute	meters per minute	ft/min	Metre per second
m/s	m/s		1		metre per second	metres per second	meter per second	meters per second	ft/s	Metre per second
Mach	Mach		0	mach	Mach	Mach			km/h mph	Mach number
mi/d	mi/d		1.8626666666666667e-2		mile per day	miles per day			km/d	Orders of magnitude (speed)
mi/s	mi/s		1609.344		mile per second	miles per second			km/s	Mile
mm/h	mm/h		0.001/60/60		millimetre per hour	millimetres per hour	millimeter per hour	millimeters per hour	in/h	Metre per second
mph	mph		0.44704		mile per hour	miles per hour			km/h	Miles per hour
Ns/kg	N‑s/kg		1		N‑s/kg	N‑s/kg			isp	Specific impulse
si tsfc	g/(kN⋅s)		1/101972/9.80665	invert	g/(kN⋅s)	g/(kN⋅s)			tsfc	Thrust specific fuel consumption
tsfc	lb/(lbf⋅h)		1/9.80665/3600	invert	lb/(lbf⋅h)	lb/(lbf⋅h)			si tsfc	Thrust specific fuel consumption
cm/y	=cm/year
cm/yr	=cm/year
in/y	=in/year
in/yr	=in/year
knot	=kn
knots	=kn
kph	=km/h
mi/h	=mph
mm/s	==mm/s	default = in/s	link = Metre per second

Temperature

Unit code	Symbol	Scale	Extra	Name	Plural name	Prefix	Default	Link
C	°C	1	-273.15	degree Celsius	degrees Celsius		F	Celsius
F	°F	5/9	32-273.15*(9/5)	degree Fahrenheit	degrees Fahrenheit		C	Fahrenheit
K	K	1	0	kelvin		SI	C F	Kelvin
keVT	keV	11.604505e6	0	kiloelectronvolt			MK	Electronvolt
R	°R	5/9	0	degree Rankine	degrees Rankine		K F C	Rankine scale
Celsius	=C
°C	=C
°F	=F
°R	=R

Temperature change

Unit code	Symbol	Scale	Name	Plural name	Default	Link
C-change	°C	1	degree Celsius change	degrees Celsius change	F-change	Celsius
F-change	°F	5/9	degree Fahrenheit change	degrees Fahrenheit change	C-change	Fahrenheit
K-change	K	1	kelvin change	kelvins change	F-change	Kelvin
°C-change	=C-change
°F-change	=F-change

Time

Unit code	Symbol	Scale	Name	Plural name	Prefix	Default	Link
century	ha	3,155,760,000	century	centuries		Gs	Century
d	d	86,400	day			ks	Day
decade	daa	315,576,000	decade			Ms	Decade
dog year	dog yr	7 * 31,557,600	dog year			years	List of unusual units of measurement#Dog year
fortnight	~fortnight	1,209,600	fortnight			week	Fortnight
h	h	3600	hour			ks	Hour
long billion year	Ta	31,557,600,000,000,000,000	billion years	billion years		Es	Annum
millennium	ka	31,557,600,000	millennium	millennia		Gs	Millennium
milliard year	Ga	31,557,600,000,000,000	milliard years	milliard years		Ps	Annum
million year	Ma	31,557,600,000,000	million years	million years		Ts	Annum
min	min	60	minute			s	Minute
month	~month	2,629,800	month			Ms	Month
months	mo	2,629,800	month			year	Month
s	s	1	second		SI	min	Second
short billion year	Ga	31,557,600,000,000,000	billion years	billion years		Ps	Annum
short trillion year	Ta	31,557,600,000,000,000,000	trillion years	trillion years		Es	Annum
thousand million year	Ga	31,557,600,000,000,000	thousand million years	thousand million years		Ps	Annum
wk	~week	604,800	week			Ms	Week
year	a	31,557,600	year			Ms	Annum
years	yr	31,557,600	year			Ms	Annum
byr	=short billion year
day	=d
days	=d
dog yr	=dog year
Gyr	=thousand million year
hour	=h
hours	=h
kMyr	=thousand million year
kmyr	=thousand million year
kyr	=millennium
long byr	=long billion year
minute	=min
minutes	=min
mth	=month
Myr	=million year
myr	=million year
second	=s
seconds	=s
tmyr	=thousand million year
tryr	=short trillion year
tyr	=millennium
week	=wk
weeks	=wk
yr	=year

Torque

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	US plural name	Prefix	Default	Link
kg.m	kg⋅m		9.80665	kilogram metre		kilogram meter			Nm lbft	Kilogram metre (torque)
kgf.m	kgf⋅m		9.80665	kilogram force-metre		kilogram force-meter			Nm lbfft	Kilogram metre (torque)
kgm	kg⋅m		9.80665	kilogram metre		kilogram meter			Nm lbfft	Kilogram metre (torque)
kpm	kp⋅m		9.80665	kilopond metre		kilopond meter			Nm lbft	Kilogram metre (torque)
lb-fft	ft⋅lb_f		1.3558179483314004	pound force-foot	pound force-feet				Nm	Pound-foot (torque)
lb.ft	lb⋅ft		1.3558179483314004	pound force-foot	pound force-feet				Nm	Pound-foot (torque)
lb.in	lb⋅in		0.1129848290276167	pound force-inch					mN.m	Pound-foot (torque)
lbfft	lbf⋅ft		1.3558179483314004	pound force-foot	pound force-feet				Nm	Pound-foot (torque)
lbft	lb⋅ft		1.3558179483314004	pound-foot	pound-feet				Nm	Pound-foot (torque)
m.kg-f	m⋅kg_f		9.80665	metre kilogram-force	metre kilograms-force	meter kilogram-force	meter kilograms-force		Nm lbfft	Kilogram metre (torque)
m.kgf	m⋅kgf		9.80665	metre kilogram-force	metre kilograms-force	meter kilogram-force	meter kilograms-force		Nm lbfft	Kilogram metre (torque)
mN.m	mN⋅m		0.001	millinewton-metre		millinewton-meter			lb.in	Newton-metre
Nm	N⋅m		1	newton-metre		newton-meter		SI	lbfft	Newton-metre
kN/m	==kN/-m-stiff	default = lbf/in
lbf/in	==lbf/-in-stiff	default = kN/m
lb-f.ft	=lb-fft
lbf.ft	=lbfft
lbf·ft	=lbfft
lb·ft	=lb.ft
mkg-f	=m.kg-f
mkgf	=m.kgf
N.m	=Nm
N·m	=Nm

Transportation

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
ton-mile	~ton-mile		0.90718474*1.609344		ton-mile					tkm	Ton-mile
tkm	tkm		1		tonne-kilometre		tonne-kilometer			ton-mile	Tonne-kilometre

Volume

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
-12USoz(mL)serve	12 US fl oz (355 mL) serving	12 U.S. fl oz (355 mL) serving	12*0.0000295735295625		12 US fl oz (355 mL) serving		12 U.S. fl oz (355 mL) serving			mL	Beverage can#Standard sizes
-12USoz(ml)serve	12 US fl oz (355 ml) serving	12 U.S. fl oz (355 ml) serving	12*0.0000295735295625		12 US fl oz (355 ml) serving		12 U.S. fl oz (355 ml) serving			ml	Beverage can#Standard sizes
-12USozserve	12 US fl oz serving	12 U.S. fl oz serving	12*0.0000295735295625		12 US fl oz serving		12 U.S. fl oz serving			mL	Beverage can#Standard sizes
acre-foot	acre⋅ft		1233.48183754752		acre-foot	acre-foot				m3	Acre-foot
acre-ft	acre⋅ft		1233.48183754752		acre-foot	acre-feet				m3	Acre-foot
AUtbsp	AU tbsp		0.000020		Australian tablespoon					ml	Australian tablespoon
Bcuft	billion cu ft		28316846.592		billion cubic foot	billion cubic feet				Gl	Cubic foot
bdft	bd ft		0.0023597372167		board foot	board feet				m3	Board foot
board feet	~board foot		0.0023597372167		board foot	board feet				m3	Board foot
board foot	~board foot		0.0023597372167		board foot	board foot				m3	Board foot
cc	cc		0.000001		cubic centimetre		cubic centimeter			cuin	Cubic centimetre
CID	cu in		0.000016387064		cubic inch	cubic inches				cc	Cubic inch#Engine displacement
cord	cord		3.624556363776		cord					m3	Cord (unit)
cufoot	cu ft		0.028316846592		cubic foot	cubic foot				m3	Cubic foot
cuft	cu ft		0.028316846592		cubic foot	cubic feet				m3	Cubic foot
cuin	cu in		0.000016387064		cubic inch	cubic inches				cm3	Cubic inch
cumi	cu mi		4,168,181,825.440579584		cubic mile					km3	Cubic mile
cuyd	cu yd		0.764554857984		cubic yard					m3	Cubic yard
firkin	~firkin		0.04091481		firkin					l impgal USgal	Firkin (unit)
foot3	=cufoot
Goilbbl	Gbbl		158987294.928		billion barrels	billion barrels				v * 1.58987294928 < 10 ! e6 ! e9 ! m3	Barrel (unit)#Oil barrel
gr water	gr H₂O		0.00000006479891		grains water	grains water				cm3	Grain (unit)
grt	grt		2.8316846592		gross register ton					m3	Gross register tonnage
impbbl	imp bbl		0.16365924		imperial barrel					l impgal USgal	Barrel (unit)
impbsh	imp bsh		0.03636872		imperial bushel					l impgal USdrygal	Imperial bushel
impbu	imp bu		0.03636872		imperial bushel					m3	Imperial bushel
impgal	imp gal		0.00454609		imperial gallon					l USgal	Imperial gallon
impgi	gi		0.0001420653125		gill					ml USoz	Gill (unit)
impkenning	kenning		0.01818436		imperial kenning					l USdrygal	Kenning (unit)
impoz	imp fl oz		0.0000284130625		imperial fluid ounce					ml USoz	Imperial fluid ounce
imppk	pk		0.00909218		imperial peck					l USdrygal	Peck
imppt	imp pt		0.00056826125		imperial pint					l	Imperial pint
impqt	imp qt		0.0011365225		imperial quart					ml USoz	@Imperial quart
kilderkin	~kilderkin		0.08182962		kilderkin					l impgal USgal	Kilderkin
koilbbl	kbbl		158.987294928		thousand barrels	thousand barrels				v * 1.58987294928 < 10 ! ! e3 ! m3	Barrel (unit)#Oil barrel
L	L		0.001		litre		liter		SI	impgal USgal	Litre
l	l		0.001		litre		liter		SI	impgal USgal	Litre
m3	m³		1		cubic %smetre		cubic %smeter		SI3	cuft	Cubic metre
Mbbl	Mbbl		158.987294928		thousand barrels	thousand barrels				v * 1.58987294928 < 10 ! e3 ! ! m3	Barrel (unit)#Oil barrel
MMoilbbl	MMbbl		158987.294928		million barrels	million barrels				v * 1.58987294928 < 10 ! e3 ! e6 ! m3	Barrel (unit)#Oil barrel
Moilbbl	Mbbl		158987.294928		million barrels	million barrels				v * 1.58987294928 < 10 ! e3 ! e6 ! m3	Barrel (unit)#Oil barrel
MTON	MTON		0.028316846592*40		measurement ton					m3	Measurement ton
MUSgal	million US gal	million U.S. gal	3785.411784		million US gallons	million US gallons	million U.S. gallons	million U.S. gallons		Ml	US gallon
oilbbl	bbl		0.158987294928		barrel					m3	Barrel (unit)#Oil barrel
stere	~stere		1		stere					cuft	Stere
Toilbbl	Tbbl		158987294928		trillion barrels	trillion barrels				v * 1.58987294928 < 10 ! e9 ! e12 ! m3	Barrel (unit)#Oil barrel
USbbl	US bbl	U.S. bbl	0.119240471196		US barrel		U.S. barrel			l USgal impgal	Barrel (unit)
USbeerbbl	US bbl	U.S. bbl	0.117347765304		US beer barrel		U.S. beer barrel			l USgal impgal	Barrel (unit)
USbsh	US bsh	U.S. bsh	0.03523907016688		US bushel		U.S. bushel			l USdrygal impgal	Bushel
USbu	US bu	U.S. bu	0.03523907016688		US bushel		U.S. bushel			l USdrygal impgal	Bushel
USdrybbl	US dry bbl	U.S. dry bbl	0.11562819898508		US dry barrel		U.S. dry barrel			m3	Barrel (unit)
USdrygal	US dry gal	U.S. dry gal	0.00440488377086		US dry gallon		U.S. dry gallon			l	Gallon
USdrypt	US dry pt	U.S. dry pt	0.0005506104713575		US dry pint		U.S. dry pint			ml	Pint
USdryqt	US dry qt	U.S. dry qt	0.001101220942715		US dry quart		U.S. dry quart			ml	Quart
USflgal	US fl gal	U.S. fl gal	0.003785411784		US gallon		U.S. gallon			l impgal	Gallon
USgal	US gal	U.S. gal	0.003785411784		US gallon		U.S. gallon			l impgal	US gallon
USgi	gi		0.0001182941183		gill					ml impoz	Gill (unit)
USkenning	US kenning	U.S. kenning	0.01761953508344		US kenning		U.S. kenning			l impgal	Kenning (unit)
USmin	US min	U.S. min	0.000000061611519921875		US minim		U.S. minim			ml	Minim (unit)
USoz	US fl oz	U.S. fl oz	0.0000295735295625		US fluid ounce		U.S. fluid ounce			ml	US fluid ounce
USpk	US pk	U.S. pk	0.00880976754172		US peck		U.S. peck			l impgal	Peck
USpt	US pt	U.S. pt	0.000473176473		US pint		U.S. pint			l imppt	Pint
USqt	US qt	U.S. qt	0.000946352946		US quart		U.S. quart			ml	+Quart
USquart	US qt	U.S. qt	0.000946352946		US quart		U.S. quart			ml impoz	Quart
UStbsp	US tbsp	U.S. tbsp	0.000946352946/64		US tablespoon		U.S. tablespoon			ml	US tablespoon
winecase	~case		0.009		case					l	Case (goods)
*U.S.drygal	=USdrygal	sp=us	link = *Gallon
*U.S.gal	=USgal	sp=us	default = L impgal	link = *US gallon
+USdrygal	=USdrygal	link = +Gallon
+usfloz	=USoz	link = +Fluid ounce
+USgal	=USgal	link = +US gallon
+USoz	=USoz	link = +US fluid ounce
@impgal	=impgal	link = @Gallon
acre feet	=acre-ft
acre foot	=acre-foot
acre ft	=acre-ft
acre-feet	=acre-ft
acre.foot	=acre-foot
acre.ft	=acre-ft
acre·ft	=acre-ft
bushels	=USbsh
cid	=CID
ft3	=cuft
gal	=USgal
gallon	!Use %{USgal%} for US gallons or %{impgal%} for imperial gallons (not %{gallon%})
gallons	!Use %{USgal%} for US gallons or %{impgal%} for imperial gallons (not %{gallons%})
Gcuft	=e9cuft
impfloz	=impoz
Impgal	=impgal
in3	=cuin	symbol = in³
kcuft	=e3cuft
kcum	=e3m3
km³	=km3
liter	=L	sp=us
liters	=L	sp=us
litre	=L
litres	=L
Mcuft	=e6cuft
Mcum	=e6m3
Mft3	=e6cuft
mi3	=cumi
m³	=m3
Pcuft	=e15cuft
pt	!Use %{USpt%} for US pints or %{imppt%} for imperial pints (not %{pt%})
qt	!Use %{USqt%} for US quarts or %{impqt%} for imperial quarts (not %{qt%})
Tcuft	=e12cuft
Tft3	=e12cuft
U.S.bbl	=USbbl	sp=us	default = l U.S.gal impgal
U.S.beerbbl	=USbeerbbl	sp=us	default = l U.S.gal impgal
U.S.bsh	=USbsh	sp=us	default = l U.S.drygal impgal
U.S.bu	=USbu	sp=us	default = l U.S.drygal impgal
U.S.drybbl	=USdrybbl	sp=us
U.S.drygal	=USdrygal	sp=us
U.S.drypt	=USdrypt	sp=us
U.S.dryqt	=USdryqt	sp=us
U.S.flgal	=USflgal	sp=us
U.S.floz	=USoz	sp=us
U.S.gal	=USgal	sp=us	default = L impgal	link = U.S. gallon
u.s.gal	=USgal	sp=us	default = L impgal	link = U.S. gallon
U.S.gi	=USgi	sp=us
U.S.kenning	=USkenning	sp=us
U.S.oz	=USoz	sp=us
U.S.pk	=USpk	sp=us
U.S.pt	=USpt	sp=us
U.S.qt	=USqt	sp=us	default = L impqt	link = *Quart
usbbl	=USbbl
usbeerbbl	=USbeerbbl
usbsh	=USbsh
usbu	=USbu
usdrybbl	=USdrybbl
usdrygal	=USdrygal
usdrypt	=USdrypt
usdryqt	=USdryqt
USfloz	=USoz
usfloz	=USoz
USGAL	=USgal
usgal	=USgal
usgi	=USgi
uskenning	=USkenning
usoz	=USoz
uspk	=USpk
uspt	=USpt
usqt	=USqt
yd3	=cuyd

Volume per unit area

Unit code	Symbol	US symbol	Scale	Name	Plural name	US name	US plural name	Default	Link
cuft/sqmi	==cuft/sqmi	default = m3/km2
m3/ha	m³/ha		0.0001	cubic metre per hectare	cubic metres per hectare	cubic meter per hectare	cubic meters per hectare	USbu/acre	Hectare
m3/km2	==m3/km2	default = cuft/sqmi
U.S.gal/acre	==U.S.gal/acre	default = m3/km2
USbu/acre	~US bushel per acre		0.03523907016688/4046.8564224	US bushel per acre	US bushels per acre			m3/ha	Bushel
USgal/acre	==USgal/acre	default = m3/km2

Volume per unit length

Unit code	Symbol	US symbol	Scale	Extra	Name	Plural name	US name	US plural name	Prefix	Default	Link
cuyd/mi	==cuyd/mi	default = m3/km
m3/km	==m3/km	default = cuyd/mi

Input multiples

The following tables define composite input units consisting of multiple unit codes. A composite must consist of two unit codes where the second is a subdivision of the first. In addition, a default output must be specified. Optionally, an alternate unit code or name can be specified. An alternate unit must have the same scale as that of the subdivision, but may have a different name or symbol.

If both an alternate unit and name are provided, the unit will be used when the input consists of only two components, and the alternate name will be used with three or more (generally, the alternate name would be shorter than the unit's standard name or symbol, and that may be desirable when three or more units make up an input composite).

If an alternate name is used, it replaces the unit's symbol and name and plural name. In other words, the same alternate name applies regardless of whether the unit is abbreviated, and regardless of the number of units.

If the unit yd allows ft as a subdivision, and ft allows in, then the input to a conversion can use all three units (for example, {{convert|1|yd|2|ft|3|in}} which specifies the input as 1 yard, 2 feet, 3 inches). There is no limit to the number of units that can be used in an input multiple.

To simplify processing by the script which extracts data from this wikitext, a unit code is required in the first column; that unit code is not used. This section is read after all units and combinations are defined, so the unit codes may refer to items defined anywhere on this page.

Area

Composite code	Unit code	Unit code	Default
_acre_rood	acre	rood	ha
_acre_sqperch	acre	sqperch	ha
_rood_sqperch	rood	sqperch	m2

Length

Composite code	Unit code	Unit code	Default
_ch_ft	ch	ft	m
_ch_yd	ch	yd	m
_chain_ft	chain	ft	m
_chain_yd	chain	yd	m
_foot_in	foot	in	m
_ft_in	ft	in	m
_mi_ch	mi	ch	km
_mi_chlk	mi	chlk	km
_mi_chain	mi	chain	km
_mi_chainlk	mi	chainlk	km
_mi_ft	mi	ft	km
_mi_furlong	mi	furlong	km
_mi_yd	mi	yd	km
_smi_chain	smi	chain	km
_yd_ft	yd	ft	m

Mass

Composite code	Unit code	Unit code	Default	Alternate
_lb_oz	lb	oz	kg
_Lcwt_qtr	Lcwt	qtr	kg
_Lcwt_st	Lcwt	st	kg
_long_cwt_qtr	long cwt	qtr	kg
_LT_Lcwt	LT	Lcwt	t	-Lcwt
_lt_Lcwt	lt	Lcwt	t	-Lcwt
_qtr_lb	qtr	lb	kg
_st_lb	st	lb	kg lb
_ST_Scwt	ST	Scwt	t	-Scwt

Output multiples

The following tables define the "multiple" unit codes that can be used for an output unit. Using a multiple code for the output means that the conversion result contains multiple components (for example, a length expressed in yards, feet, inches).

Length

Multiple code	Unit code	Unit code	Unit code	Unit code
mich	mi	ch
michlk	mi	chlk
michainlk	mi	chainlk
miyd	mi	yd
miydftin	mi	yd	ft	in
mift	mi	ft
ydftin	yd	ft	in
ydft	yd	ft
ftin	ft	in
footin	foot	in
handin	hand	in

Mass

Multiple code	Unit code	Unit code	Unit code
lboz	lb	oz
stlb	st	lb
stlboz	st	lb	oz
st and lb	st	lb

Combinations

The following tables list predefined "combination" unit codes that can be used for an output unit. Using a combination code for the output means that the input value is converted to more than one unit. In addition to the combinations listed here, units may be combined by separating unit codes with a space or plus character.

Force

Combination code	Unit code	Unit code	Unit code
GN LTf	GN	-LTf
GN LTf STf	GN	-LTf	-STf
GN STf	GN	-STf
GN STf LTf	GN	-STf	-LTf
kN LTf	kN	-LTf
kN LTf STf	kN	-LTf	-STf
kN STf	kN	-STf
kN STf LTf	kN	-STf	-LTf
LTf STf	-LTf	-STf
MN LTf	MN	-LTf
MN LTf STf	MN	-LTf	-STf
MN STf	MN	-STf
MN STf LTf	MN	-STf	-LTf
STf LTf	-STf	-LTf

Fuel efficiency

Combination code	Unit code	Unit code
L/100 km mpgimp	L/100 km	mpgimp
l/100 km mpgimp	l/100 km	mpgimp
L/100 km mpgUS	L/100 km	mpgus
L/100 km mpgus	L/100 km	mpgus
l/100 km mpgus	l/100 km	mpgus
mpgimp L/100 km	mpgimp	L/100 km

Mass

Combination code	Unit code	Unit code	Unit code
LT ST t	lt	-ST	t
LT t ST	lt	t	-ST
ST LT t	-ST	lt	t
ST t LT	-ST	t	lt
t LT ST	t	lt	-ST
ton	LT	ST

Pressure

Combination code	Unit code	Unit code	Unit code	Unit code
kPa kg/cm2	kPa	kgf/cm2
kPa lb/in2	kPa	-lb/in2

Volume

Combination code	Unit code	Unit code	Unit code	Unit code
floz	impoz	USoz

Defaults

The following tables define default outputs for unit codes that use an SI prefix or an engineering notation prefix, where the default output is different from that of the base unit.

Area

Unit code	Default output
cm2	sqin
dm2	sqin
e3acre	km2
e3m2	e6sqft
e6acre	km2
e6ha	e6acre
e6km2	e6sqmi
e6m2	e6sqft
e6sqft	v * 9.290304 < 100 ! e3 ! e6 ! m2
e6sqmi	e6km2
hm2	acre
km2	sqmi
mm2	sqin

Energy

Unit code	Default output
aJ	eV
e3BTU	MJ
e6BTU	GJ
EJ	kWh
fJ	keV
GJ	kWh
MJ	kWh
PJ	kWh
pJ	MeV
TJ	kWh
YJ	kWh
yJ	μeV
ZJ	kWh
zJ	meV

Flow

Unit code	Default output
e12cuft/a	v * 2.8316846592 < 100 ! e9 ! e12 ! m3/a
e12cuft/d	v * 2.8316846592 < 100 ! e9 ! e12 ! m3/d
e12m3/a	Tcuft/a
e12m3/d	Tcuft/d
e3cuft/a	v * 2.8316846592 < 100 ! ! e3 ! m3/a
e3cuft/d	v * 2.8316846592 < 100 ! ! e3 ! m3/d
e3cuft/s	v * 2.8316846592 < 100 ! ! e3 ! m3/s
e3m3/a	v < 28.316846592 ! k ! M ! cuft/a
e3m3/d	v < 28.316846592 ! k ! M ! cuft/d
e3m3/s	v < 28.316846592 ! k ! M ! cuft/s
e3USgal/a	v * 3.785411784 < 1000 ! ! e3 ! m3/a
e6cuft/a	v * 2.8316846592 < 100 ! e3 ! e6 ! m3/a
e6cuft/d	v * 2.8316846592 < 100 ! e3 ! e6 ! m3/d
e6cuft/s	v * 2.8316846592 < 100 ! e3 ! e6 ! m3/s
e6m3/a	v < 28.316846592 ! M ! G ! cuft/a
e6m3/d	v < 28.316846592 ! M ! G ! cuft/d
e6m3/s	v < 28.316846592 ! e6 ! e9 ! cuft/s
e6USgal/a	v * 3.785411784 < 1000 ! e3 ! e6 ! m3/a
e9cuft/a	m3/a
e9cuft/d	v * 2.8316846592 < 100 ! e6 ! e9 ! m3/d
e9m3/a	v < 28.316846592 ! G ! T ! cuft/a
e9m3/d	v < 28.316846592 ! G ! T ! cuft/d
e9m3/s	v < 28.316846592 ! e9 ! e12 ! cuft/s
e9USgal/a	v * 3.785411784 < 1000 ! e6 ! e9 ! m3/a
e9USgal/s	v * 3.785411784 < 1000 ! e6 ! e9 ! m3/s

Force

Unit code	Default output
nN	gr-f
μN	gr-f
mN	oz-f

Length

Unit code	Default output
am	in
cm	in
dam	ft
dm	in
e12km	e12mi
e12mi	e12km
e3AU	ly
e3km	e3mi
e3mi	e3km
e6km	e6mi
e6mi	e6km
e9km	AU
e9mi	e9km
Em	mi
fm	in
Gm	mi
hm	ft
km	mi
mm	in
Mm	mi
nm	in
Pm	mi
pm	in
Tm	mi
Ym	mi
ym	in
Zm	mi
zm	in
μm	in

Mass

Unit code	Default output
e12lb	v * 4.5359237 < 10 ! Mt ! Gt
e3lb	v * 4.5359237 < 10 ! kg ! t
e3ozt	v * 0.311034768 < 10 ! kg ! t
e3t	LT ST
e6carat	t
e6lb	v * 4.5359237 < 10 ! t ! kilotonne
e6ozt	lb kg
e6ST	Mt
e6t	LT ST
e9lb	v * 4.5359237 < 10 ! kilotonne ! Mt
e9t	LT ST
Gg	lb
kg	lb
mg	gr
Mg	LT ST
ng	gr
μg	gr

Radioactivity

Unit code	Default output
mBq	fCi
kBq	nCi
MBq	μCi
GBq	mCi
TBq	Ci
PBq	kCi
EBq	kCi
fCi	mBq
pCi	Bq
nCi	Bq
μCi	kBq
mCi	MBq
kCi	TBq
MCi	PBq

Time

Unit code	Default output
ns	μs
μs	ms
ms	s
ks	h
Ms	week
Gs	decade
Ts	millennium
Ps	million year
Es	thousand million year

Temperature

Unit code	Default output
MK	keVT

Volume

Unit code	Default output
cL	impoz usoz
cl	impoz usoz
cm3	cuin
dL	impoz usoz
dl	impoz usoz
mm3	cuin
dm3	cuin
e12cuft	v * 2.8316846592 < 100 ! e9 ! e12 ! m3
e12impgal	v * 4.54609 < 1000 ! T ! P ! l
e12m3	v < 28.316846592 ! T ! P ! cuft
e12U.S.gal	v * 3.785411784 < 1000 ! T ! P ! l
e12USgal	v * 3.785411784 < 1000 ! T ! P ! l
e15cuft	v * 2.8316846592 < 100 ! e12 ! e15 ! m3
e15m3	Pcuft
e3bdft	v * 0.23597372167 < 100 ! e3 ! e6 ! m3
e3cuft	v * 2.8316846592 < 100 ! ! e3 ! m3
e3impgal	v * 4.54609 < 1000 ! k ! M ! l
e3m3	v < 28.316846592 ! k ! M ! cuft
e3U.S.gal	v * 3.785411784 < 1000 ! k ! M ! l
e3USgal	v * 3.785411784 < 1000 ! k ! M ! l
e6bdft	v * 0.23597372167 < 100 ! e3 ! e6 ! m3
e6cuft	v * 2.8316846592 < 100 ! e3 ! e6 ! m3
e6cuyd	v * 7.64554857984 < 10 ! e3 ! e6 ! m3
e6impgal	v * 4.54609 < 1000 ! M ! G ! l
e6L	USgal
e6m3	v < 28.316846592 ! M ! G ! cuft
e6U.S.gal	v * 3.785411784 < 1000 ! M ! G ! l
e6USgal	v * 3.785411784 < 1000 ! M ! G ! l
e9bdft	v * 0.23597372167 < 100 ! e6 ! e9 ! m3
e9cuft	v * 2.8316846592 < 100 ! e6 ! e9 ! m3
e9impgal	v * 4.54609 < 1000 ! G ! T ! l
e9m3	v < 28.316846592 ! G ! T ! cuft
e9U.S.gal	v * 3.785411784 < 1000 ! G ! T ! l
e9USgal	v * 3.785411784 < 1000 ! G ! T ! l
GL	cuft
Gl	cuft
kL	cuft
kl	cuft
km3	cumi
mL	impoz usoz
ml	impoz usoz
Ml	v < 28.316846592 ! e3 ! e6 ! cuft
ML	v < 28.316846592 ! e3 ! e6 ! cuft
TL	cumi
Tl	cumi
μL	cuin
μl	cuin

Links

The following tables define links for unit codes that use an SI prefix, where the linked article is different from that of the base unit.

Area

Unit code	Linked article
mm2	Square millimetre
cm2	Square centimetre
dm2	Square decimetre
km2	Square kilometre

Energy

Unit code	Linked article
kJ	Kilojoule
MJ	Megajoule
GJ	Gigajoule
TJ	Terajoule

Length

Unit code	Linked article
fm	Femtometre
pm	Picometre
nm	Nanometre
μm	Micrometre
mm	Millimetre
cm	Centimetre
dm	Decimetre
dam	Decametre
hm	Hectometre
km	Kilometre
Mm	Megametre
Gm	Gigametre
Tm	Terametre
Pm	Petametre
Em	Exametre
Zm	Zettametre
Ym	Yottametre

Mass

Unit code	Linked article
μg	Microgram
mg	Milligram
kg	Kilogram
Mg	Tonne

Power

Unit code	Linked article
yW	Yoctowatt
zW	Zeptowatt
aW	Attowatt
fW	Femtowatt
pW	Picowatt
nW	Nanowatt
μW	Microwatt
mW	Milliwatt
kW	Kilowatt
MW	Megawatt
GW	Gigawatt
TW	Terawatt
PW	Petawatt
EW	Exawatt
ZW	Zettawatt
YW	Yottawatt

Time

Unit code	Linked article
as	Attosecond
fs	Femtosecond
ps	Picosecond
ns	Nanosecond
μs	Microsecond
ms	Millisecond
ks	Kilosecond
Ms	Megasecond
Gs	Gigasecond
Ts	Terasecond
Ps	Petasecond
Es	Exasecond
Zs	Zettasecond
Ys	Yottasecond

Volume

Unit code	Linked article
mm3	Cubic millimetre
cm3	Cubic centimetre
dm3	Cubic decimetre
dam3	Cubic decametre
km3	Cubic kilometre
μL	Microlitre
μl	Microlitre
mL	Millilitre
ml	Millilitre
cL	Centilitre
cl	Centilitre
dL	Decilitre
dl	Decilitre
daL	Decalitre
dal	Decalitre
hL	Hectolitre
hl	Hectolitre
kL	Kilolitre
kl	Kilolitre
ML	Megalitre
Ml	Megalitre
GL	Gigalitre
Gl	Gigalitre
TL	Teralitre
Tl	Teralitre
PL	Petalitre
Pl	Petalitre

Automatic per units

The following table defines equivalent unit types for some of the types that can be generated automatically for unit codes of the form x/y (x per y). For example, the unit code kg/hl is not defined, so if it were used, it would be regarded as kilograms per hectolitre with unit type mass/volume; the following table would translate that to density so the unit could be converted with other density units. If "Density" is specified in the Link column, the unit name or symbol would be linked to Density if |lk=on is used.

In addition, a scale multiplier can be specified; that allows mass/area units to be converted to pressure units on the assumption that the mass refers to the force due to the "weight" of an object.

Type/type	Equivalent unit type	Link	Multiplier
/area	per unit area
/volume	per unit volume
area/area	area per unit area
energy/length	energy per unit length
energy/mass	energy per unit mass
energy/time	power	Power (physics)
energy/volume	energy per unit volume
force/area	pressure	Pressure
length/length	gradient	Grade (slope)
length/time	speed	Speed
length/time/time	acceleration	Acceleration
mass/area	pressure		9.80665
mass/length	linear density
mass/mass	concentration
mass/power	mass per unit power
mass/time	mass per unit time
mass/volume	density	Density
power/mass	power per unit mass
power/volume		Power density
pressure/length	fracture gradient
speed/time	acceleration	Acceleration
volume/area	volume per unit area
volume/length	volume per unit length
volume/time	flow

Overrides

The following tables define "override" unit codes which conflict with another unit when it is combined with one of the SI prefixes. The script which processes this page rejects unit codes that duplicate a known entry, however, that checking is not performed for the unit codes listed here. The Comment field documents the conflict, but is otherwise ignored.

Area

Override code	Comment
daa	Override default prefix which would give name "decaare".
ha	Override default prefix which would give name "hectoare".

Mass

Override code	Comment
MT	For "metric ton", not "megatesla".

Pressure

Override code	Comment
Pa	For "Pascal", not "peta-are".

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