Part 5: Unit Symbols
Edition 1
This part lists and defines the unit symbols recognized under the API-SI unit model (see Part 4).
The unit symbols described here are based on guidelines published in the following standards. These references are provided for information only and do not form a part of this standard.
- [ISO-4217] ISO 4217 (Codes for the Representation of Currencies and Funds)
- [ISO-1000] ISO 1000-1981 (E) (SI units and recommendations for the use of their multiples and of certain other units)
Table 1 describes the base unit symbols defined under le Système International d'Unités (SI).
| Table 1 - SI Base Unit Symbols
|
| Unit Symbol
| Unit Name
|
| A
| ampere
|
| K
| kelvin
|
| cd
| candela
|
| kg
| kilogram
|
| m
| meter
|
| mol
| mole
|
| rad
| radian
|
| s
| second
|
| sr
| steradian |
Table 2 describes the supplemental base unit symbols defined under API-SI, excluding currency unit symbols. These are not considered to be SI base units.
| Table 2 - API-SI Base Unit Symbols - Non-Currency
|
| Unit Symbol
| Unit Name
|
| dAPI
| api gravity
|
| dB
| decibel
|
| gAPI
| api gamma ray
|
| nAPI
| api neutron |
Currency base units are based on the alphabetic currency codes defined in table A.1 (excluding fund codes) of ISO 4217. Only the codes listed in Table 3 apply to the API-SI unit model. They are not considered to be SI base units.
| Table 3 - API-SI Currency Base Unit Symbols
|
| Unit Symbol
| Unit Name
|
| ADP
| Andorran peseta
|
| AED
| UAE dirham
|
| AFA
| Afghanistan afghani
|
| ALL
| Albanian lek
|
| ANG
| Netherlands Antillian guilder
|
| AOK
| Angolan kwanza
|
| ARA
| Argentinian austral
|
| ATS
| Austrian schilling
|
| AUD
| Australian dollar
|
| AWG
| Aruban guilder
|
| BBD
| Barbados dollar
|
| BDT
| Bangladesh taka
|
| BEF
| Belgian franc
|
| BGL
| Bulgarian lev
|
| BHD
| Bahraini dinar
|
| BIF
| Burundi franc
|
| BMD
| Burmuda dollar
|
| BND
| Brunei dollar
|
| BOB
| Bolivian boliviano
|
| BRC
| Brazilian cruzado
|
| BSD
| Bahamian dollar
|
| BTN
| Bhutan ngultrum
|
| BUK
| Burmese kyat
|
| BWP
| Botswanian pula
|
| BZD
| Belize dollar
|
| CAD
| Canadian dollar
|
| CHF
| Swiss franc
|
| CLP
| Chilean peso
|
| CNY
| Chinese yuan renminbi
|
| COP
| Colombian peso
|
| CRC
| Costa Rican colon
|
| CSK
| Czechoslovakian koruna
|
| CUP
| Cuban peso
|
| CVE
| Cape Verde escudo
|
| CYP
| Cyprus pound
|
| DDM
| Mark der DDR
|
| DEM
| Deutsche mark
|
| DJF
| Djibouti franc
|
| DKK
| Danish krone
|
| DOP
| Dominican peso
|
| DZD
| Algerian dinar
|
| ECS
| Ecuadorian sucre
|
| EGP
| Egyptian pound
|
| ESP
| Spanish peseta
|
| ETB
| Ethiopian birr
|
| FIM
| Finnish markka
|
| FJD
| Fiji dollar
|
| FKP
| Falkland Islands pound
|
| FRF
| French franc
|
| GBP
| British pound sterling
|
| GHC
| Ghanian cedi
|
| GIP
| Gibraltar pound
|
| GMD
| Gambian dalasi
|
| GNF
| Guinea franc
|
| GRD
| Grecian drachma
|
| GTQ
| Guatemalan quetzal
|
| GWP
| Guinea-Bissau peso
|
| GYD
| Guyana dollar
|
| HKD
| Hong Kong dollar
|
| HNL
| Honduran lempira
|
| HTG
| Haitian gourde
|
| HUF
| Hungarian forint
|
| IDR
| Indonesian rupiah
|
| IEP
| Irish pound
|
| ILS
| Israeli shekel
|
| INR
| Indian rupee
|
| IQD
| Iraqi dinar
|
| IRR
| Iranian rial
|
| ISK
| Iceland krona
|
| ITL
| Italian lira
|
| JMD
| Jamaican dollar
|
| JOD
| Jordanian dinar
|
| JPY
| Japanese yen
|
| KES
| Kenyan shilling
|
| KHR
| Kampuchean riel
|
| KMF
| Comoro franc
|
| KPW
| North Korean won
|
| KRW
| South Korean won
|
| KWD
| Kuwaiti dinar
|
| KYD
| Cayman Islands dollar
|
| LAK
| Lao kip
|
| LBP
| Lebanese pound
|
| LKR
| Sri Lanka rupee
|
| LRD
| Liberian dollar
|
| LSL
| Lesothoan loti
|
| LUF
| Luxembourg franc
|
| LYD
| Libyan dinar
|
| MAD
| Moroccan dirham
|
| MGF
| Malagasy franc
|
| MNT
| Mongolian tugrik
|
| MOP
| Macauan pataca
|
| MRO
| Mauritanian ouguiya
|
| MTL
| Maltese lira
|
| MUR
| Mauritius rupee
|
| MVR
| Maldives rufiyaa
|
| MWK
| Malawian kwacha
|
| MXP
| Mexican peso
|
| MYR
| Malaysian ringgit
|
| MZM
| Mozambique metical
|
| NGN
| Nigerian naira
|
| NIC
| Nicaraguan cordoba
|
| NLG
| Netherlands guilder
|
| NOK
| Norwegian krone
|
| NPR
| Nepalese rupee
|
| NZD
| New Zealand dollar
|
| OMR
| Omani rail
|
| PAB
| Panamanian balboa
|
| PEI
| Peruvian inti
|
| PGK
| Papua New Guinean kina
|
| PHP
| Philippine peso
|
| PKR
| Pakistan rupee
|
| PLZ
| Polish zloty
|
| PTE
| Portuguese escudo
|
| PYG
| Paraguayan guarani
|
| QAR
| Qatari rial
|
| ROL
| Romainian leu
|
| RWF
| Rwanda franc
|
| SAR
| Saudi riyal
|
| SBD
| Solomon Islands dollar
|
| SCR
| Seychelles rupee
|
| SDP
| Sudanese pound
|
| SEK
| Swedish krone
|
| SGD
| Singapore dollar
|
| SHP
| St. Helena pound
|
| SLL
| Sierra Leone leone
|
| SOS
| Somali shilling
|
| SRG
| Suriname guilder
|
| STD
| Sao Tome and Principe dobra
|
| SUR
| CIS rouble
|
| SVC
| El Salvador colon
|
| SYP
| Syrian pound
|
| SZL
| Swaziland lilangeni
|
| THB
| Thai baht
|
| TND
| Tunisian dollar
|
| TOP
| Tongan pa'anga
|
| TPE
| Timor escudo
|
| TRL
| Turkish lira
|
| TTD
| Trinidad and Tobago dollar
|
| TWD
| New Taiwan dollar
|
| TZS
| Tanzanian shilling
|
| UGS
| Uganda shilling
|
| USD
| US dollar
|
| UYP
| Uruguayan peso
|
| VEB
| Venezuelan bolivar
|
| VND
| Vietnamese dong
|
| VUV
| Vanuatuan vatu
|
| WST
| Western Samoan tala
|
| XAF
| CFA franc, Central Africa
|
| XCD
| East Caribbean dollar
|
| XDR
| SDR, international monetary fund
|
| XEU
| European currency unit
|
| XOF
| CFA franc, West Africa
|
| XPF
| CFP franc
|
| YDD
| Yemeni dinar
|
| YER
| Yemeni rial
|
| YUD
| new Yugoslavian dinar
|
| ZAR
| South African rand
|
| ZMK
| Zambian kwacha
|
| ZRZ
| Zaire zaire
|
| ZWD
| Zimbabwe dollar |
Table 4 describes all derived unit symbols recognized under the API-SI unit model.
| Table 4 - API-SI Derived Unit Symbols
|
| Unit Symbol
| Unit Expression
| Unit Name
|
| %
| 0.01
| percent
|
| B
| 10 dB
| bel
|
| Bq
| 1/s
| becquerel
|
| Btu
| 1055.05585262 J
| British thermal unit (international)
|
| C
| A.s
| coulomb
|
| Ci
| 37 GBq
| curie
|
| D
| 0.9869233 um2
| darcy
|
| EJ
| 1E18 J
| exajoule
|
| F
| C/V
| farad
|
| GBq
| 1E9 Bq
| gigabecquerel
|
| GHz
| 1E9 Hz
| gigahertz
|
| GJ
| 1E9 J
| gigajoule
|
| GPa
| 1E9 Pa
| gigapascal
|
| GS
| 1E9 S
| gigasiemens
|
| GW
| 1E9 W
| gigawatt
|
| Gal
| cm/s2
| galileo
|
| GeV
| 1E9 eV
| gigaelectronvolt
|
| Gohm
| 1E9 ohm
| gigaohm
|
| Grad
| 1E9 rad
| gigaradian
|
| Gy
| J/kg
| gray
|
| H
| Wb/A
| henry
|
| Hz
| 1/s
| hertz
|
| J
| N.m
| joule
|
| L
| dm3
| liter
|
| MA
| 1E6 A
| megampere
|
| MBq
| 1E6 Bq
| megabecquerel
|
| MHz
| 1E6 Hz
| megahertz
|
| MJ
| 1E6 J
| megajoule
|
| MN
| 1E6 N
| meganewton
|
| MPa
| 1E6 Pa
| megapascal
|
| MV
| 1E6 V
| megavolt
|
| MW
| 1E6 W
| megawatt
|
| Ma
| 1E6 a
| million years
|
| MeV
| 1E6 eV
| megaelectronvolt
|
| Mg
| 1000 kg
| megagram
|
| Mm
| 1E6 m
| megameter
|
| Mohm
| 1E6 ohm
| megohm
|
| Mpsi
| 1E6 psi
| million pounds per square inch
|
| Mrad
| 1E6 rad
| megaradian
|
| N
| kg.m/s2
| newton
|
| Oe
| 79.57747 A/m
| oersted
|
| P
| 0.1 Pa.s
| poise
|
| Pa
| N/m2
| pascal
|
| S
| A/V
| siemens
|
| Sv
| J/kg
| sievert
|
| T
| Wb/m2
| tesla
|
| TBq
| 1E12 Bq
| terabecquerel
|
| TJ
| 1E12 J
| terajoule
|
| TW
| 1E12 W
| terawatt
|
| TeV
| 1E12 eV
| teraelectonvolt
|
| Tohm
| 1E12 ohm
| teraohm
|
| V
| W/A
| volt
|
| W
| J/s
| watt
|
| Wb
| V.s
| weber
|
| a
| 3.155815E7 s
| annum (sidereal year)
|
| aJ
| 1E-18 J
| attojoule
|
| acre
| 627264E5/15499969 m2
| acre
|
| ag
| 1E-18 g
| attogram
|
| atm
| 101.325 kPa
| standard atmosphere
|
| b
| 1E-28 m2
| barn
|
| bar
| 100 kPa
| bar
|
| bbl
| 42 galUS
| barrel (U.S.)
|
| c
| 360 dega
| revolution (cycle)
|
| cP
| 0.01 P
| centipoise
|
| cal
| 4.1868 J
| calorie (international)
|
| cm
| 0.01 m
| centimeter
|
| cu
| 0.1 1/m
| capture unit
|
| d
| 24 h
| day
|
| daN
| 10 N
| decanewton
|
| dega
| 0.0174532925198 rad
| degree (angle)
|
| degC
| K, -273.15
| degree celsius
|
| degF
| 5/9 degC, 32
| degree fahrenheit
|
| degR
| 5/9 K
| degree rankine
|
| dm
| 0.1 m
| decimeter
|
| ehp
| 746 W
| electric horsepower
|
| eV
| 1.60219E-19 J
| electron volt
|
| fC
| 1E-15 C
| femtocoulomb
|
| fm
| 1E-15 m
| femtometer
|
| ft
| 12 in
| foot (international)
|
| ftAM
| 0.30478897 m
| foot (American modified)
|
| ftCla
| 0.30479727 m
| foot (Clarke)
|
| ftUS
| 1200/3937 m
| foot (U.S. survey)
|
| g
| 0.001 kg
| gram
|
| galUK
| 4.54609E-3 m3
| gallon (U.K.)
|
| galUS
| 3.785411784E-3 m3
| gallon (U.S.)
|
| gf
| 0.001 kgf
| gram force
|
| h
| 60 min
| hour
|
| hL
| 100 L
| hectoliter
|
| ha
| 1E4 m2
| hectare
|
| hbar
| 100 bar
| hectobar
|
| hhp
| 746.043 W
| hydraulic horsepower
|
| hp
| 550 ft.lbf/s
| horsepower
|
| in
| 0.0254 m
| inch (international)
|
| inUS
| 1/12 ftUS
| inch (U.S. survey)
|
| kA
| 1000 A
| kiloampere
|
| kC
| 1000 C
| kilocoulomb
|
| kHz
| 1000 Hz
| kilohertz
|
| kJ
| 1000 J
| kilojoule
|
| kN
| 1000 N
| kilonewton
|
| kPa
| 1000 Pa
| kilopascal
|
| kS
| 1000 S
| kilosiemens
|
| kV
| 1000 V
| kilovolt
|
| kW
| 1000 W
| kilowatt
|
| kcal
| 1000 cal
| kilocalorie
|
| kcd
| 1000 cd
| kilocandela
|
| keV
| 1000 eV
| kiloelectronvolt
|
| kgf
| 9.806650 N
| kilogram force
|
| klx
| 1000 lx
| kilolux
|
| km
| 1000 m
| kilometer
|
| kmol
| 1000 mol
| killomole
|
| kohm
| 1000 ohm
| kilohm
|
| krad
| 1000 rad
| kiloradian
|
| lbf
| 4.4482216152605 N
| pound force
|
| lbm
| 0.45359237 kg
| pound mass (avoirdupois)
|
| lm
| cd.sr
| lumen
|
| lx
| cd.sr/m2
| lux
|
| mA
| 0.001 A
| milliampere
|
| mC
| 0.001 C
| millicoulomb
|
| mCi
| 0.001 Ci
| millicurie
|
| mD
| 0.9869233E-3 um2
| millidarcy
|
| mGal
| 0.001 Gal
| milligal
|
| mGy
| 0.001 Gy
| milligray
|
| mH
| 0.001 H
| millihenry
|
| mHz
| 0.001 Hz
| millihertz
|
| mJ
| 0.001 J
| millijoule
|
| mL
| 0.001 L
| milliliter
|
| mN
| 0.001 N
| millinewton
|
| mPa
| 0.001 Pa
| millipascal
|
| mS
| 0.001 S
| millisiemens
|
| mSv
| 0.001 Sv
| millisievert
|
| mT
| 0.001 T
| millitesla
|
| mV
| 0.001 V
| millivolt
|
| mW
| 0.001 W
| milliwatt
|
| mWb
| 0.001 Wb
| milliweber
|
| mbar
| 0.001 bar
| millibar
|
| mg
| 0.001 g
| milligram
|
| mi
| 5280 ft
| mile (statute)
|
| miUS
| 5280 ftUS
| mile (U.S. survey)
|
| min
| 60 s
| minute
|
| mina
| 1/60 dega
| minute (angle)
|
| mm
| 0.001 m
| millimeter
|
| mmol
| 0.001 mol
| millimole
|
| mohm
| 0.001 ohm
| milliohm
|
| mrad
| 0.001 rad
| milliradian
|
| ms
| 0.001 s
| millisecond
|
| nA
| 1E-9 A
| nanoampere
|
| nC
| 1E-9 C
| nanocoulomb
|
| nCi
| 1E-9 Ci
| nanocurie
|
| nH
| 1E-9 H
| nanohenry
|
| nJ
| 1E-9 J
| nanojoule
|
| nT
| 1E-9 T
| nanotesla
|
| nW
| 1E-9 W
| nanowatt
|
| nm
| 1E-9 m
| nanometer
|
| nohm
| 1E-9 ohm
| nanohm
|
| ns
| 1E-9 s
| nanosecond
|
| ohm
| V/A
| ohm
|
| ozf
| 1/16 lbf
| ounce force
|
| ozm
| 1/16 lbm
| ounce mass
|
| pA
| 1E-12 A
| picoampere
|
| pC
| 1E-12 C
| picocoulomb
|
| pCi
| 1E-12 Ci
| picocurie
|
| pF
| 1E-12 F
| picofarad
|
| pPa
| 1E-12 Pa
| picopascal
|
| pS
| 1E-12 S
| picosiemens
|
| pm
| 1E-12 m
| picometer
|
| ppdk
| 1E-4
| part per ten thousand
|
| ppk
| 0.001
| part per thousand
|
| ppm
| 1E-6
| part per million
|
| ps
| 1E-12 s
| picosecond
|
| psi
| lbf/in2
| pound per square inch
|
| pu
| 0.01 m3/m3
| porosity unit
|
| seca
| 1/3600 dega
| second (angle)
|
| t
| 1000 kg
| metric ton
|
| tonUK
| 2240 lbm
| long ton (U.K.)
|
| tonUS
| 2000 lbm
| short ton (U.S.)
|
| uA
| 1E-6 A
| microampere
|
| uC
| 1E-6 C
| microcoulomb
|
| uCi
| 1E-6 Ci
| microcurie
|
| uF
| 1E-6 F
| microfarad
|
| uH
| 1E-6 H
| microhenry
|
| uHz
| 1E-6 Hz
| microhertz
|
| uJ
| 1E-6 J
| microjoule
|
| uN
| 1E-6 N
| micronewton
|
| uPa
| 1E-6 Pa
| micropascal
|
| uS
| 1E-6 S
| microsiemens
|
| uT
| 1E-6 T
| microtesla
|
| uV
| 1E-6 V
| microvolt
|
| uW
| 1E-6 W
| microwatt
|
| uWb
| 1E-6 Wb
| microweber
|
| ubar
| 1E-6 bar
| microbar
|
| ug
| 1E-6 g
| microgram
|
| um
| 1E-6 m
| micrometer
|
| umol
| 1E-6 mole
| micromole
|
| uohm
| 1E-6 ohm
| microhm
|
| upsi
| 1E-6 psi
| micropound per square inch
|
| urad
| 1E-6 rad
| microradian
|
| us
| 1E-6 s
| microsecond |
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