Module:Convert/documentation/conversion data

From OODA WIKI

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.

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.

Pipe characters (|) in a table need to be encoded. For example, "[[Gallon|gal]]" should be entered as "[[Gallon&#124;gal]]". The script that reads this page replaces each &#124; with |.

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:

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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 Extra Name Plural name US name US plural 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
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 US symbol Scale Extra Name Plural name US name US plural 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 Extra Name Plural name US name US plural name Prefix 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/ll default = oz/cuin
μg/dL ==μg/dL default = lb/cuin
μg/l ==μg/ll 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 Extra 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 BTU39°F 1059.67 British thermal unit (39°F) British thermal units (39°F) kJ British thermal unit
Btu-39F Btu39°F 1059.67 British thermal unit (39°F) British thermal units (39°F) kJ British thermal unit
BTU-59F BTU59°F 1054.804 British thermal unit (59°F) British thermal units (59°F) kJ British thermal unit
Btu-59F Btu59°F 1054.804 British thermal unit (59°F) British thermal units (59°F) kJ British thermal unit
BTU-60F BTU60°F 1054.68 British thermal unit (60°F) British thermal units (60°F) kJ British thermal unit
Btu-60F Btu60°F 1054.68 British thermal unit (60°F) British thermal units (60°F) kJ British thermal unit
BTU-63F BTU63°F 1054.6 British thermal unit (63°F) British thermal units (63°F) kJ British thermal unit
Btu-63F Btu63°F 1054.6 British thermal unit (63°F) British thermal units (63°F) kJ British thermal unit
BTU-ISO BTUISO 1055.056 British thermal unit (ISO) British thermal units (ISO) kJ British thermal unit
Btu-ISO =BTU-ISO
BTU-IT BTUIT 1055.05585262 British thermal unit (IT) British thermal units (IT) kJ British thermal unit
Btu-IT BtuIT 1055.05585262 British thermal unit (IT) British thermal units (IT) kJ British thermal unit
BTU-mean BTUmean 1055.87 British thermal unit (mean) British thermal units (mean) kJ British thermal unit
Btu-mean Btumean 1055.87 British thermal unit (mean) British thermal units (mean) kJ British thermal unit
BTU-th BTUth 1054.35026444 British thermal unit (thermochemical) British thermal units (thermochemical) kJ British thermal unit
Btu-th Btuth 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 CalIT 4186.8 Calorie (International Steam Table) Calories (International Steam Table) kJ Calorie
cal-IT calIT 4.1868 calorie (International Steam Table) calories (International Steam Table) J Calorie
Cal-th Calth 4184 Calorie (thermochemical) Calories (thermochemical) kJ Calorie
cal-th calth 4.184 calorie (thermochemical) calories (thermochemical) J Calorie
CHU-IT CHUIT 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 Eh 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⋅lbf 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⋅lbf 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⋅ozf 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 kcalIT 4186.8 kilocalorie (International Steam Table) kilocalories (International Steam Table) kJ Calorie
kcal-th kcalth 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 McalIT 4,186,800 megacalorie (International Steam Table) megacalories (International Steam Table) MJ Calorie
mcal-IT mcalIT 0.0041868 millicalorie (International Steam Table) millicalories (International Steam Table) mJ Calorie
Mcal-th Mcalth 4,184,000 megacalorie (thermochemical) megacalories (thermochemical) MJ Calorie
mcal-th mcalth 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 Extra Name Plural name US name US plural 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 Prefix 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 1609.344/(33.705*3.6e6) 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 Extra Name Plural name US name US plural name Prefix Default Link
BTU/lb BTU/lb 2.326*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 Scale Extra Name Plural name US name US plural name Prefix Default Link
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/ll 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra Name Plural name US name US 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 gf 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 grf 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 kgf 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/Tf 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 lbf 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 LTf 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 mgf 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 ozf 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/Tf 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 STf 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 tf 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 Name Plural name US name US plural name Prefix Default Link
impgal/mi ==@impgal/mi default = L/km USgal/mi
km/L ==km/L default = mpgimp mpgus
km/l ==km/ll 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 ==ll/100km default = mpgimp mpgus symlink = Fuel economy in automobiles#Units of measure|l/100 km
L/km ==L/km default = mpgimp mpgus
l/km ==ll/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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US plural 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
au =AU symbol = au
feet =ft
hands =hand
inch =in
inches =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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra 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 US symbol Scale Extra 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 ~deadweight metric ton 1000 deadweight tonne deadweight metric ton 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra Name Plural name US name US plural name Prefix Default Link
/l /l 1000 per litre per litre per liter per liter /usgal Litre
/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 Extra Name Plural name US name US 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 Extra Name Plural name US name US plural name Prefix 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 Extra 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 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
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 US symbol Scale Extra Name Plural name US name US plural 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 Prefix 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 US symbol Scale Extra Name Plural name US name US 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 US symbol Scale Extra Name Plural name US name US plural name Prefix 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 US symbol Scale Extra Name Plural name US name US 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 v < 7200 ! min ! h 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
sec =s
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 Extra 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⋅lbf 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⋅kgf 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
ll l 0.001 litre liter 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 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
hm³ =hm3
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
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 link = U.S. gallon
u.s.gal =USgal sp=us 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 Extra Name Plural name US name US plural name Prefix 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 Alternate Name
_acre_rood acre rood ha
_acre_sqperch acre sqperch ha
_rood_sqperch rood sqperch m2

Length

Composite code Unit code Unit code Default Alternate Name
_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 Name
_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 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 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 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 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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