Every unit, defined

Length, area & volume

Area — 24 units
microbarnmillibarnbarnsquare nanometersquare micrometercircular milthousand circular milssquare millimetersquare centimetersquare inchsquare decimetersquare footsquare yardsquare metertsubosquare rodaresquare chaindunamroodacrehectaresquare kilometersquare mile

Area moment of inertia — 7 units
nanometer to the fourthmicrometer to the fourthmillimeter to the fourthcentimeter to the fourthinch to the fourthfoot to the fourthmeter to the fourth

Length — 41 units
Planck lengthfemtometerpicometerbohr radiusangstromnanometermicrometerthoupointmillimeterpicacentimeterinchdecimeterhandlinkfootUS survey footyardmeterfathomrodchaincable lengthfurlongkilometermilenautical mileleaguemegameterEarth radiuslight-secondlunar distancesolar radiuslight-minuteastronomical unitlight-yearparseckiloparsecmegaparsecgigaparsec

Section modulus — 7 units
cubic micrometercubic millimetercubic centimeterthousand cubic millimeterscubic inchcubic footcubic meter

Volume — 34 units
cubic millimetermicrolitermillilitercubic centimeterUS teaspooncentiliterUS tablespooncubic inchimperial fluid ounceUS fluid ouncedeciliterUS cupUS pintimperial pintUS quartlitercubic decimeterimperial quartboard footUS gallonimperial galloncubic footUS bushelhectoliterUS beer barreloil barrelcubic yardcubic meterkiloliterhundred cubic feetcordacre-footmillion US gallonscubic kilometer

Mass, density & flow

Density — 16 units
microgram per litermilligram per cubic metermilligram per literpound per cubic yardkilogram per cubic metergram per literpound per cubic footpound per imperial gallonpound per US gallonslug per cubic footgram per cubic centimetergram per milliliterkilogram per litertonne per cubic meterUS short ton per cubic yardpound per cubic inch

Linear mass density — 12 units
decitexdeniermilligram per metertexgram per meterkilogram per kilometergram per centimeterpound per yardkilogram per meterpound per footpound per inchslug per foot

Mass — 29 units
unified atomic mass unit (dalton)picogramnanogrammicrogrammilligramcentigramgrainmetric caratgrampennyweightdramouncetroy ouncetroy poundpoundkilogramstoneslugUS hundredweightUK long hundredweightquintalUS short tonmetric tonneUK long tonkilotonnemegatonnegigatonneEarth masssolar mass

Mass flow rate — 20 units
pound per yearkilogram per yeargram per hourmilligram per secondpound per daykilogram per daygram per minutetonne per yearpound per hourkilogram per hourgram per secondpound per minuteUS short ton per daytonne per daykilogram per minutethousand pounds per hourUS short ton per hourtonne per hourpound per secondkilogram per second

Molar volume — 8 units
cubic angstrom per particlecubic centimeter per molemilliliter per molecubic foot per pound-moleliter per molecubic decimeter per molecubic meter per kilomolecubic meter per mole

Unit weight — 8 units
newton per cubic meterpound-force per cubic yardkilogram-force per cubic meterpound-force per cubic footkilonewton per cubic metergram-force per cubic centimeterUS short ton-force per cubic yardpound-force per cubic inch

Volumetric flow rate — 23 units
liter per daycubic centimeter per minutemilliliter per minuteUS gallon per daycubic inch per minuteliter per hourmilliliter per secondUS gallon per hourbarrel per daycubic foot per hourcubic meter per dayliter per minuteUS gallon per minuteimperial gallon per minutecubic meter per hourcubic foot per minuteliter per secondacre-foot per daycubic meter per minutecubic foot per secondmillion US gallons per daymillion imperial gallons per daycubic meter per second

Time, speed & motion

Acceleration — 11 units
microgalmilligalmillimeter per second squaredcentimeter per second squaredgalinch per second squaredkilometer per hour per secondfoot per second squaredmile per hour per secondmeter per second squaredstandard gravity

Angle — 14 units
microarcsecondmilliarcsecondmicroradianarcsecondarcminutemil (NATO)milliradiangradiandegreecompass pointhour angleradianquadrantrevolution

Angular acceleration — 8 units
degree per minute squaredradian per minute squaredmilliradian per second squaredrevolution per minute squareddegree per second squaredrpm per secondradian per second squaredrevolution per second squared

Angular speed — 11 units
degree per hourrevolution per daydegree per minutemilliradian per secondrevolution per hourradian per minutedegree per secondrevolution per minuteradian per secondrevolution per secondthousand revolutions per minute

Diffusivity — 13 units
square micrometer per secondsquare meter per yearsquare millimeter per secondcentistokessquare foot per daysquare meter per daysquare foot per hoursquare centimeter per secondstokessquare meter per hoursquare inch per secondsquare foot per secondsquare meter per second

Frequency — 17 units
nanohertzper yearmicrohertzper dayper hourmillihertzrevolution per minutecycle per minutebeat per minutehertzcycle per secondrevolution per secondkilohertzmegahertzgigahertzterahertzpetahertz

Speed — 23 units
millimeter per yearmillimeter per daymillimeter per hourinch per dayfoot per dayinch per hourmeter per daymillimeter per minutemeter per hourinch per minutemillimeter per secondfoot per minutecentimeter per secondmeter per minuteinch per secondkilometer per hourfoot per secondmile per hourknotmeter per secondmach (sea level)kilometer per secondspeed of light

Time — 22 units
Planck timeattosecondfemtosecondpicosecondnanosecondshakemicrosecondmillisecondsecondminutehoursidereal daydayweekfortnightmonthyeardecadecenturymillenniummegayeareon

Force, pressure & mechanics

Angular momentum — 10 units
reduced Planck constantPlanck constantgram square centimeter per seconderg secondkilogram square centimeter per secondpound square foot per secondkilogram square meter per secondjoule secondnewton meter secondslug square foot per second

Force — 15 units
micronewtondynemillinewtongram-forcepoundalounce-forcenewtonpound-forcekilogram-forcekilonewtonkipUS short ton-forcetonne-forceUK long ton-forcemeganewton

Moment of inertia — 12 units
gram square centimeterkilogram square millimeterounce square inchkilogram square centimeterpound square inchgram square meterpound square footpound-force inch second squaredkilogram square meterslug square footpound-force foot second squaredtonne square meter

Momentum — 12 units
megaelectron volt per cgigaelectron volt per cgram centimeter per seconddyne secondmillinewton secondpound foot per secondkilogram meter per secondnewton secondpound-force secondslug foot per secondkilonewton secondtonne meter per second

Pressure — 25 units
microbarbaryemillitorrpascalmillimeter of water columnpound per square footcentimeter of water columnhectopascalmillibartorrmillimeter of mercuryinch of water columnkilopascalfoot of water columninch of mercurypound per square inchmeter of water columndecibarkilogram-force per square centimeterbaratmospheremegapascalkip per square inchgigapascalmillion pounds per square inch

Spring constant — 12 units
millinewton per meternewton per meterpound-force per footnewton per centimeterpound-force per inchkilogram-force per centimeterkilonewton per meternewton per millimeterkilogram-force per millimeterkip per footkip per inchmeganewton per meter

Surface tension — 10 units
micronewton per metermillinewton per meterdyne per centimetermillijoule per square metererg per square centimetergram-force per centimeternewton per meterjoule per square meterpound-force per footpound-force per inch

Torque — 14 units
dyne centimetermillinewton meternewton millimeterounce-force inchnewton centimeterpoundal footkilogram-force centimeterinch pound-forcenewton meterfoot pound-forcekilogram-force meterkip inchkilonewton meterkip foot

Energy & power

Energy — 36 units
electron volthartreekiloelectron voltmegaelectron voltgigaelectron voltnanojouleergteraelectron voltmicrojoulemillijouleinch-poundjoulefoot-poundcaloriecalorie (International Table)kilojouleBTU (thermochemical)British thermal unitwatt-hourkilocaloriemegajoulehorsepower-hourkilowatt-hourthermgigajoulemillion BTUmegawatt-hourton of TNTtonne of oil equivalentterajoulegigawatt-hourkiloton of TNTpetajouleterawatt-hourmegaton of TNTquad

Heat capacity — 12 units
millijoule per kelvinjoule per kelvinjoule per Celsius degreecalorie per kelvinkilojoule per kelvinkilojoule per Celsius degreeBTU per Fahrenheit degreeBTU per Rankine degreewatt-hour per kelvinkilocalorie per kelvinmegajoule per kelvinkilowatt-hour per kelvin

Molar energy — 10 units
joule per molekilojoule per kilomoleBTU per pound-molecalorie per molekilojoule per molekilocalorie per moleelectronvolt per particlemegajoule per molehartree per particlemegaelectronvolt per particle

Power — 21 units
nanowatterg per secondmicrowattmilliwattfoot pound-force per minuteBTU per hourwattkilocalorie per hourfoot pound-force per secondthousand BTU per hourmetric horsepowerhorsepower (mechanical)electrical horsepowerkilowattton of refrigerationboiler horsepowermillion BTU per hourmegawattgigawattterawattsolar luminosity

Heat & temperature

Areal thermal resistance — 9 units
square millimeter kelvin per wattsquare centimeter Celsius per wattsquare inch hour Fahrenheit per BTUtogclohour square foot Fahrenheit per BTUsquare meter hour Celsius per kilocaloriesquare meter kelvin per wattsquare meter Celsius per watt

Heat transfer coefficient — 8 units
watt per square meter kelvinwatt per square meter Celsiuskilocalorie per hour square meter CelsiusBTU per hour square foot Fahrenheitkilowatt per square meter kelvinwatt per square centimeter kelvinBTU per second square foot Fahrenheitcalorie per second square centimeter Celsius

Humidity ratio — 8 units
part per billion by volume (moisture)microgram per kilogram of dry airpart per million by volume (moisture)milligram per kilogram of dry airgrain per pound of dry airgram per kilogramkilogram per kilogrampound per pound of dry air

Specific heat capacity — 10 units
joule per kilogram-kelvinjoule per kilogram-Celsiusfoot pound-force per pound-Rankinekilojoule per kilogram-kelvinkilojoule per kilogram-Celsiusjoule per gram-kelvincalorie per gram-Celsiuskilocalorie per kilogram-CelsiusBTU per pound-FahrenheitBTU per pound-Rankine

Specific latent heat — 10 units
joule per kilogramfoot pound-force per poundkilojoule per kilogramjoule per gramBTU per poundwatt-hour per kilogramcalorie per gramkilocalorie per kilogrammegajoule per kilogramkilowatt-hour per kilogram

Temperature — 11 units
nanokelvinmicrokelvinmillikelvindegree Fahrenheitdegree Rankinekelvindegree Celsiusdegree Réaumurkilokelvinmegakelvingigakelvin

Temperature difference — 8 units
microkelvin (difference)millikelvin (difference)milli-Celsius degree (difference)Fahrenheit degree (difference)Rankine degree (difference)kelvin (difference)Celsius degree (difference)Réaumur degree (difference)

Thermal conductance — 10 units
microwatt per kelvinmilliwatt per kelvinBTU per hour FahrenheitBTU per hour Rankinewatt per kelvinwatt per Celsius degreekilocalorie per hour Celsiuskilowatt per kelvinkilowatt per Celsius degreemegawatt per kelvin

Thermal conductivity — 9 units
milliwatt per meter-kelvinBTU inch per hour square foot Fahrenheitwatt per meter-kelvinwatt per meter-Celsiuskilocalorie per hour meter CelsiusBTU per hour-foot-Fahrenheitwatt per centimeter-kelvincalorie per second centimeter Celsiuskilowatt per meter-kelvin

Thermal expansion coefficient — 10 units
part per million per kelvinpart per million per Celsius degreepart per million per Fahrenheit degreemicroinch per inch per Fahrenheit degreepercent per Celsius degreepercent per Fahrenheit degreeper kelvinper Celsius degreeper Fahrenheit degreeper Rankine degree

Thermal resistance — 8 units
Celsius degree per kilowattkelvin per kilowattCelsius hour per kilocaloriekelvin per wattCelsius degree per wattFahrenheit hour per BTURankine hour per BTUkelvin per milliwatt

Electricity & magnetism

Capacitance — 8 units
femtofaradpicofaradmicromicrofaradnanofaradmicrofaradmillifaradfaradkilofarad

Electric charge — 12 units
elementary chargepicocoulombnanocoulombmicrocoulombmillicoulombmicroampere-hourcoulombmilliampere-hourkilocoulombampere-hourfaradaykiloampere-hour

Electric current — 8 units
femtoamperepicoamperenanoamperemicroamperemilliampereamperekiloamperemegaampere

Electrical conductance — 8 units
picosiemensnanosiemensmicrosiemensmicromhomillisiemenssiemensmhokilosiemens

Electrical conductivity — 10 units
microsiemens per metermicrosiemens per centimetermicromho per centimetermillisiemens per metermillisiemens per centimetermillimho per centimetersiemens per metersiemens per centimeterpercent IACSmegasiemens per meter

Electrical resistivity — 10 units
nanoohm meterohm circular mil per footmicroohm centimetermicroohm meterohm square millimeter per metermilliohm centimeterohm centimeterohm meterkiloohm centimetermegaohm centimeter

Inductance — 5 units
picohenrynanohenrymicrohenrymillihenryhenry

Magnetic flux — 6 units
magnetic flux quantumnanowebermaxwellmicrowebermilliweberweber

Magnetic flux density — 9 units
femtoteslapicoteslananoteslamilligaussmicroteslagaussmilliteslakilogausstesla

Magnetic moment — 7 units
nuclear magnetonBohr magnetonerg per gaussmilliampere square meteremu (magnetic moment)joule per teslaampere square meter

Molar charge — 4 units
coulomb per molemilliampere-hour per molekilocoulomb per moleampere-hour per mole

Resistance — 8 units
nanoohmmicroohmmilliohmohmkiloohmmegaohmgigaohmteraohm

Voltage — 8 units
picovoltnanovoltmicrovoltmillivoltvoltkilovoltmegavoltgigavolt

Chemistry

Amount of substance — 9 units
molecule (single particle)femtomolepicomolenanomolemicromolemillimolemolepound-molekilomole

Concentration — 16 units
part per trillionnanogram per literparts per billionmicrogram per literparts per millionpart per million by volumemilligram per kilogrammilligram per litergrain per US gallon (as CaCO₃)part per thousandgram per literpercentpercent by weightpercent by volumepercent weight per volumefraction (0–1)

Molal constant — 5 units
kelvin kilogram per kilomolekelvin kilogram per moleCelsius kilogram per molekelvin per molalCelsius degree per molal

Molality — 8 units
nanomole per kilogrammicromole per kilogrammillimole per kilogramcentimole per kilogrammilliequivalent per 100 gramsmole per kilogram (molal)millimole per grammilliequivalent per gram

Molar concentration — 10 units
femtomole per literpicomole per liternanomole per litermicromole per litermole per cubic metermillimole per litermilliequivalent per litermole per liter (molar)mole per cubic decimeternormal (equivalent per liter)

Molar entropy — 8 units
joule per mole kelvinjoule per mole Celsiuskilojoule per kilomole kelvincalorie per mole kelvinentropy unitBTU per pound-mole RankineBoltzmann constant per particlekilojoule per mole kelvin

Molar mass — 7 units
gram per molekilogram per kilomolemilligram per millimolepound per pound-moledalton (as molar mass)kilogram per molekilodalton (as molar mass)

Number density — 9 units
per cubic meterper cubic footper literper cubic centimeterper milliliterper microliterper cubic millimeteramagatper cubic angstrom

Light, sound & radiation

Intensity — 10 units
microwatt per square metermilliwatt per square metermicrowatt per square centimeterwatt per square meterBTU per hour square footmilliwatt per square centimeterlangley per minutekilowatt per square meterwatt per square centimetermegawatt per square centimeter

Optical power — 3 units
millidiopterdiopter (1/m)reciprocal meter

Radioactivity — 16 units
millibecquereldisintegration per minutepicocuriebecquereldisintegration per secondnanocuriekilobecquerelmicrocuriemegabecquerelrutherfordmillicuriegigabecquerelcurieterabecquerelkilocuriepetabecquerel

Sound level — 3 units
decibelneperbel

Wavenumber — 10 units
per kilometerper meterper footper inchper centimeter (kayser)per millimeterline pairs per millimeterper micrometerper nanometerper angstrom

Fluids & other

Corrosion rate — 6 units
nanometer per yearmicrometer per yearmil per yearmillimeter per yearinch per yearmeter per year

Count — 1 units
count

Dimensionless — 8 units
part per trillionpart per billionpart per millionper cent millebasis pointper millepercentratio

Dynamic viscosity — 12 units
micropascal secondmillipoisepound per foot hourmillipascal secondcentipoisemicroreynpoisepascal secondpound per foot secondpound-force second per square footkilopascal secondreyn

Standard gravitational parameter — 5 units
cubic meter per second squaredcubic kilometer per second squaredterrestrial mass parametersolar mass parametercubic astronomical unit per square day

Other

Area per time — 5 units
hectare per hourhectare per daysquare meter per secondacre per houracre per day

Beer colour — 2 units
Standard Reference MethodEuropean Brewery Convention

Cost per area — 4 units
per hectareper acreper square meterper thousand square feet

Cost per energy — 8 units
per megawatt-hourper million BTUper dekathermper gigajouleper thermper kilowatt-hourper megajouleper joule

Cost per mass — 8 units
per tonneper short tonper hundredweightper kilogramper poundper troy ounceper ounceper gram

Cost per volume — 11 units
per acre-footper thousand cubic feetper thousand US gallonsper hundred cubic feetper cubic meterper thousand litersper oil barrelper cubic footper imperial gallonper US gallonper liter

Current density — 6 units
ampere per square metermilliampere per square meterampere per square centimetermilliampere per square centimetermicroampere per square centimeterampere per square foot

Electric field strength — 9 units
volt per meternewton per coulombvolt per centimeterkilovolt per metervolt per millimeterkilovolt per millimetermegavolt per metervolt per milkilovolt per mil

Energy per area — 6 units
joule per square meterkilojoule per square meterjoule per square centimetermillijoule per square centimetercalorie per square centimetermegajoule per square meter

Energy per length — 4 units
joule per meterkilojoule per millimeterjoule per millimeterkilojoule per inch

Energy per volume — 7 units
joule per cubic meterwatt-hour per literkilowatt-hour per cubic meterjoule per cubic millimetermegajoule per cubic meterBTU per cubic footwatt-hour per cubic inch

Fracture toughness — 4 units
pascal root metermegapascal root meterkip per square inch root inchpound per square inch root inch

Information — 14 units
bitbytekilobitmegabitgigabitterabitkilobytemegabytegigabyteterabytekibibytemebibytegibibytetebibyte

Mass concentration — 8 units
milligram per litremicrogram per litregram per litremicrogram per millilitremilligram per decilitregram per decilitrekilogram per cubic metrenanogram per millilitre

Mass flux — 6 units
kilogram per square metre per secondgram per square metre per secondkilogram per square metre per hourlitre per square metre per hourpound per square foot per secondpound per square foot per hour

Mass per area — 10 units
kilogram per hectaretonne per hectarekilogram per square metergram per square meterpound per acreshort ton per acrepound per thousand square feetounce per square yardpound per square foothundredweight per acre

Money — 1 units
currency unit

Number per area — 5 units
per square meterper hectareper acreper square footper thousand square feet

Photon flux density — 3 units
micromole per square meter secondmillimole per square meter secondmole per square meter second

Photon integral — 2 units
mole per square meter per daymillimole per square meter per day

Power per length — 5 units
watt per meterkilowatt per meterwatt per millimeterwatt per footBTU per hour per foot

Slope — 6 units
meter per meterpercent grademillimeter per meterper millefoot per footinch per foot

Specific energy — 8 units
joule per kilogramkilojoule per kilogrammegajoule per kilogramwatt-hour per kilogramkilowatt-hour per kilogramkilowatt-hour per tonneBTU per poundkilowatt-hour per short ton

Strain — 6 units
meter per meterinch per inchmicrostrainmillimeter per metermil per inchpercent strain

Unitless — 1 units
unitless

Volume per area — 8 units
liter per hectarecubic meter per hectaremilliliter per square metermillimeter of depthcentimeter of depthUS gallon per acreUS gallon per thousand square feetinch of depth

A

• acre ac · Area
• acre per day ac/day · Area per time
• acre per hour ac/h · Area per time
• acre-foot ac·ft · Volume
• acre-foot per day ac·ft/d · Volumetric flow rate
• amagat amagat · Number density
• ampere A · Electric current
• ampere per square centimeter A/cm² · Current density
• ampere per square foot A/ft² · Current density
• ampere per square meter A/m² · Current density
• ampere square meter A·m² · Magnetic moment
• ampere-hour Ah · Electric charge
• ampere-hour per mole A·h/mol · Molar charge
• angstrom Å · Length
• arcminute ′ · Angle
• arcsecond ″ · Angle
• are a · Area
• astronomical unit AU · Length
• atmosphere atm · Pressure
• attosecond as · Time

B

• bar bar · Pressure
• barn b · Area
• barrel per day bbl/d · Volumetric flow rate
• barye Ba · Pressure
• basis point bp · Dimensionless
• beat per minute bpm · Frequency
• becquerel Bq · Radioactivity
• bel B · Sound level
• bit bit · Information
• board foot fbm · Volume
• Bohr magneton μ_B · Magnetic moment
• bohr radius a0 · Length
• boiler horsepower bhp · Power
• Boltzmann constant per particle kB/particle · Molar entropy
• British thermal unit BTU · Energy
• BTU (thermochemical) BTU th · Energy
• BTU inch per hour square foot Fahrenheit BTU·in/(h·ft²·°F) · Thermal conductivity
• BTU per cubic foot BTU/ft³ · Energy per volume
• BTU per Fahrenheit degree BTU/°F · Heat capacity
• BTU per hour BTU/h · Power
• BTU per hour Fahrenheit BTU/(h·°F) · Thermal conductance
• BTU per hour per foot BTU/(h·ft) · Power per length
• BTU per hour Rankine BTU/(h·°R) · Thermal conductance
• BTU per hour square foot BTU/(h·ft²) · Intensity
• BTU per hour square foot Fahrenheit BTU/(h·ft²·°F) · Heat transfer coefficient
• BTU per hour-foot-Fahrenheit BTU/(h·ft·°F) · Thermal conductivity
• BTU per pound BTU/lb · Specific energy, Specific latent heat
• BTU per pound-Fahrenheit BTU/(lb·°F) · Specific heat capacity
• BTU per pound-mole BTU/lb-mol · Molar energy
• BTU per pound-mole Rankine BTU/(lb-mol·°R) · Molar entropy
• BTU per pound-Rankine BTU/(lb·°R) · Specific heat capacity
• BTU per Rankine degree BTU/°R · Heat capacity
• BTU per second square foot Fahrenheit BTU/(s·ft²·°F) · Heat transfer coefficient
• byte B · Information

C

• cable length cb · Length
• calorie cal · Energy
• calorie (International Table) cal IT · Energy
• calorie per gram cal/g · Specific latent heat
• calorie per gram-Celsius cal/(g·°C) · Specific heat capacity
• calorie per kelvin cal/K · Heat capacity
• calorie per mole cal/mol · Molar energy
• calorie per mole kelvin cal/(mol·K) · Molar entropy
• calorie per second centimeter Celsius cal/(s·cm·°C) · Thermal conductivity
• calorie per second square centimeter Celsius cal/(s·cm²·°C) · Heat transfer coefficient
• calorie per square centimeter cal/cm² · Energy per area
• Celsius degree (difference) C° · Temperature difference
• Celsius degree per kilowatt °C/kW · Thermal resistance
• Celsius degree per molal °C/molal · Molal constant
• Celsius degree per watt °C/W · Thermal resistance
• Celsius hour per kilocalorie °C·h/kcal · Thermal resistance
• Celsius kilogram per mole °C·kg/mol · Molal constant
• centigram cg · Mass
• centiliter cL · Volume
• centimeter cm · Length
• centimeter of depth cm · Volume per area
• centimeter of water column cmH₂O · Pressure
• centimeter per second cm/s · Speed
• centimeter per second squared cm/s² · Acceleration
• centimeter to the fourth cm⁴ · Area moment of inertia
• centimole per kilogram cmol/kg · Molality
• centipoise cP · Dynamic viscosity
• centistokes cSt · Diffusivity
• century cent · Time
• chain ch · Length
• circular mil cmil · Area
• clo clo · Areal thermal resistance
• compass point point · Angle
• cord cord · Volume
• coulomb C · Electric charge
• coulomb per mole C/mol · Molar charge
• count Count
• cubic angstrom per particle ų/particle · Molar volume
• cubic astronomical unit per square day AU³/d² · Standard gravitational parameter
• cubic centimeter cm³ · Volume, Section modulus
• cubic centimeter per minute cm³/min · Volumetric flow rate
• cubic centimeter per mole cm³/mol · Molar volume
• cubic decimeter dm³ · Volume
• cubic decimeter per mole dm³/mol · Molar volume
• cubic foot ft³ · Volume, Section modulus
• cubic foot per hour cfh · Volumetric flow rate
• cubic foot per minute cfm · Volumetric flow rate
• cubic foot per pound-mole ft³/lb-mol · Molar volume
• cubic foot per second cfs · Volumetric flow rate
• cubic inch in³ · Volume, Section modulus
• cubic inch per minute in³/min · Volumetric flow rate
• cubic kilometer km³ · Volume
• cubic kilometer per second squared km³/s² · Standard gravitational parameter
• cubic meter m³ · Volume, Section modulus
• cubic meter per day m³/d · Volumetric flow rate
• cubic meter per hectare m³/ha · Volume per area
• cubic meter per hour m³/h · Volumetric flow rate
• cubic meter per kilomole m³/kmol · Molar volume
• cubic meter per minute m³/min · Volumetric flow rate
• cubic meter per mole m³/mol · Molar volume
• cubic meter per second m³/s · Volumetric flow rate
• cubic meter per second squared m³/s² · Standard gravitational parameter
• cubic micrometer μm³ · Section modulus
• cubic millimeter mm³ · Volume, Section modulus
• cubic yard yd³ · Volume
• curie Ci · Radioactivity
• currency unit $ · Money
• cycle per minute cpm · Frequency
• cycle per second cps · Frequency

D

• dalton (as molar mass) Da · Molar mass
• day d · Time
• decade dec · Time
• decibar dbar · Pressure
• decibel dB · Sound level
• deciliter dL · Volume
• decimeter dm · Length
• decitex dtex · Linear mass density
• degree ° · Angle
• degree Celsius °C · Temperature
• degree Fahrenheit °F · Temperature
• degree per hour °/h · Angular speed
• degree per minute °/min · Angular speed
• degree per minute squared °/min² · Angular acceleration
• degree per second °/s · Angular speed
• degree per second squared °/s² · Angular acceleration
• degree Rankine °R · Temperature
• degree Réaumur °Ré · Temperature
• denier den · Linear mass density
• diopter (1/m) dpt · Optical power
• disintegration per minute dpm · Radioactivity
• disintegration per second dps · Radioactivity
• dram dr · Mass
• dunam dunam · Area
• dyne dyn · Force
• dyne centimeter dyn·cm · Torque
• dyne per centimeter dyn/cm · Surface tension
• dyne second dyn·s · Momentum

E

• Earth mass Mearth · Mass
• Earth radius REarth · Length
• electrical horsepower hp (elec) · Power
• electron volt eV · Energy
• electronvolt per particle eV/particle · Molar energy
• elementary charge e · Electric charge
• emu (magnetic moment) emu · Magnetic moment
• entropy unit e.u. · Molar entropy
• eon eon · Time
• erg erg · Energy
• erg per gauss erg/G · Magnetic moment
• erg per second erg/s · Power
• erg per square centimeter erg/cm² · Surface tension
• erg second erg·s · Angular momentum
• European Brewery Convention EBC · Beer colour

F

• Fahrenheit degree (difference) F° · Temperature difference
• Fahrenheit hour per BTU °F·h/BTU · Thermal resistance
• farad F · Capacitance
• faraday F · Electric charge
• fathom ftm · Length
• femtoampere fA · Electric current
• femtofarad fF · Capacitance
• femtometer fm · Length
• femtomole fmol · Amount of substance
• femtomole per liter fM · Molar concentration
• femtosecond fs · Time
• femtotesla fT · Magnetic flux density
• foot ft · Length
• foot of water column ft H₂O · Pressure
• foot per day ft/d · Speed
• foot per foot ft/ft · Slope
• foot per minute ft/min · Speed
• foot per second ft/s · Speed
• foot per second squared ft/s² · Acceleration
• foot pound-force ft·lbf · Torque
• foot pound-force per minute ft·lbf/min · Power
• foot pound-force per pound ft·lbf/lb · Specific latent heat
• foot pound-force per pound-Rankine ft·lbf/(lb·°R) · Specific heat capacity
• foot pound-force per second ft·lbf/s · Power
• foot to the fourth ft⁴ · Area moment of inertia
• foot-pound ft⋅lb · Energy
• fortnight fn · Time
• fraction (0–1) fraction · Concentration
• furlong fur · Length

G

• gal Gal · Acceleration
• gauss G · Magnetic flux density
• gibibyte GiB · Information
• gigabecquerel GBq · Radioactivity
• gigabit Gbit · Information
• gigabyte GB · Information
• gigaelectron volt GeV · Energy
• gigaelectron volt per c GeV/c · Momentum
• gigahertz GHz · Frequency
• gigajoule GJ · Energy
• gigakelvin GK · Temperature
• gigaohm GΩ · Resistance
• gigaparsec Gpc · Length
• gigapascal GPa · Pressure
• gigatonne Gt · Mass
• gigavolt GV · Voltage
• gigawatt GW · Power
• gigawatt-hour GWh · Energy
• gradian gon · Angle
• grain gr · Mass
• grain per pound of dry air gr/lb · Humidity ratio
• grain per US gallon (as CaCO₃) gpg · Concentration
• gram g · Mass
• gram centimeter per second g·cm/s · Momentum
• gram per centimeter g/cm · Linear mass density
• gram per cubic centimeter g/cm³ · Density
• gram per decilitre g/dL · Mass concentration
• gram per hour g/h · Mass flow rate
• gram per kilogram g/kg · Humidity ratio
• gram per liter g/L · Density, Concentration
• gram per litre g/L · Mass concentration
• gram per meter g/m · Linear mass density
• gram per milliliter g/mL · Density
• gram per minute g/min · Mass flow rate
• gram per mole g/mol · Molar mass
• gram per second g/s · Mass flow rate
• gram per square meter g/m² · Mass per area
• gram per square metre per second g/(m²·s) · Mass flux
• gram square centimeter g·cm² · Moment of inertia
• gram square centimeter per second g·cm²/s · Angular momentum
• gram square meter g·m² · Moment of inertia
• gram-force gf · Force
• gram-force per centimeter gf/cm · Surface tension
• gram-force per cubic centimeter gf/cm³ · Unit weight

H

• hand hh · Length
• hartree Eh · Energy
• hartree per particle Ha/particle · Molar energy
• hectare ha · Area
• hectare per day ha/day · Area per time
• hectare per hour ha/h · Area per time
• hectoliter hL · Volume
• hectopascal hPa · Pressure
• henry H · Inductance
• hertz Hz · Frequency
• horsepower (mechanical) hp · Power
• horsepower-hour hp·h · Energy
• hour h · Time
• hour angle h · Angle
• hour square foot Fahrenheit per BTU R (h·ft²·°F/BTU) · Areal thermal resistance
• hundred cubic feet CCF · Volume
• hundredweight per acre cwt/ac · Mass per area

I

• imperial fluid ounce imp fl oz · Volume
• imperial gallon imp gal · Volume
• imperial gallon per minute imp gpm · Volumetric flow rate
• imperial pint imp pt · Volume
• imperial quart imp qt · Volume
• inch in · Length
• inch of depth in · Volume per area
• inch of mercury inHg · Pressure
• inch of water column in w.g. · Pressure
• inch per day in/day · Speed
• inch per foot in/ft · Slope
• inch per hour in/h · Speed
• inch per inch in/in · Strain
• inch per minute in/min · Speed
• inch per second in/s · Speed
• inch per second squared in/s² · Acceleration
• inch per year in/yr · Corrosion rate
• inch pound-force in·lbf · Torque
• inch to the fourth in⁴ · Area moment of inertia
• inch-pound in·lb · Energy

J

• joule J · Energy
• joule per Celsius degree J/°C · Heat capacity
• joule per cubic meter J/m³ · Energy per volume
• joule per cubic millimeter J/mm³ · Energy per volume
• joule per gram J/g · Specific latent heat
• joule per gram-kelvin J/(g·K) · Specific heat capacity
• joule per kelvin J/K · Heat capacity
• joule per kilogram J/kg · Specific energy, Specific latent heat
• joule per kilogram-Celsius J/(kg·°C) · Specific heat capacity
• joule per kilogram-kelvin J/(kg·K) · Specific heat capacity
• joule per meter J/m · Energy per length
• joule per millimeter J/mm · Energy per length
• joule per mole J/mol · Molar energy
• joule per mole Celsius J/(mol·°C) · Molar entropy
• joule per mole kelvin J/(mol·K) · Molar entropy
• joule per square centimeter J/cm² · Energy per area
• joule per square meter J/m² · Surface tension, Energy per area
• joule per tesla J/T · Magnetic moment
• joule second J·s · Angular momentum

K

• kelvin K · Temperature
• kelvin (difference) K · Temperature difference
• kelvin kilogram per kilomole K·kg/kmol · Molal constant
• kelvin kilogram per mole K·kg/mol · Molal constant
• kelvin per kilowatt K/kW · Thermal resistance
• kelvin per milliwatt K/mW · Thermal resistance
• kelvin per molal K/molal · Molal constant
• kelvin per watt K/W · Thermal resistance
• kibibyte KiB · Information
• kiloampere kA · Electric current
• kiloampere-hour kAh · Electric charge
• kilobecquerel kBq · Radioactivity
• kilobit kbit · Information
• kilobyte kB · Information
• kilocalorie kcal · Energy
• kilocalorie per hour kcal/h · Power
• kilocalorie per hour Celsius kcal/(h·°C) · Thermal conductance
• kilocalorie per hour meter Celsius kcal/(h·m·°C) · Thermal conductivity
• kilocalorie per hour square meter Celsius kcal/(h·m²·°C) · Heat transfer coefficient
• kilocalorie per kelvin kcal/K · Heat capacity
• kilocalorie per kilogram kcal/kg · Specific latent heat
• kilocalorie per kilogram-Celsius kcal/(kg·°C) · Specific heat capacity
• kilocalorie per mole kcal/mol · Molar energy
• kilocoulomb kC · Electric charge
• kilocoulomb per mole kC/mol · Molar charge
• kilocurie kCi · Radioactivity
• kilodalton (as molar mass) kDa · Molar mass
• kiloelectron volt keV · Energy
• kilofarad kF · Capacitance
• kilogauss kG · Magnetic flux density
• kilogram kg · Mass
• kilogram meter per second kg·m/s · Momentum
• kilogram per cubic meter kg/m³ · Density
• kilogram per cubic metre kg/m³ · Mass concentration
• kilogram per day kg/d · Mass flow rate
• kilogram per hectare kg/ha · Mass per area
• kilogram per hour kg/h · Mass flow rate
• kilogram per kilogram kg/kg · Humidity ratio
• kilogram per kilometer kg/km · Linear mass density
• kilogram per kilomole kg/kmol · Molar mass
• kilogram per liter kg/L · Density
• kilogram per meter kg/m · Linear mass density
• kilogram per minute kg/min · Mass flow rate
• kilogram per mole kg/mol · Molar mass
• kilogram per second kg/s · Mass flow rate
• kilogram per square meter kg/m² · Mass per area
• kilogram per square metre per hour kg/(m²·h) · Mass flux
• kilogram per square metre per second kg/(m²·s) · Mass flux
• kilogram per year kg/yr · Mass flow rate
• kilogram square centimeter kg·cm² · Moment of inertia
• kilogram square centimeter per second kg·cm²/s · Angular momentum
• kilogram square meter kg·m² · Moment of inertia
• kilogram square meter per second kg·m²/s · Angular momentum
• kilogram square millimeter kg·mm² · Moment of inertia
• kilogram-force kgf · Force
• kilogram-force centimeter kgf·cm · Torque
• kilogram-force meter kgf·m · Torque
• kilogram-force per centimeter kgf/cm · Spring constant
• kilogram-force per cubic meter kgf/m³ · Unit weight
• kilogram-force per millimeter kgf/mm · Spring constant
• kilogram-force per square centimeter kgf/cm² · Pressure
• kilohertz kHz · Frequency
• kilojoule kJ · Energy
• kilojoule per Celsius degree kJ/°C · Heat capacity
• kilojoule per inch kJ/in · Energy per length
• kilojoule per kelvin kJ/K · Heat capacity
• kilojoule per kilogram kJ/kg · Specific energy, Specific latent heat
• kilojoule per kilogram-Celsius kJ/(kg·°C) · Specific heat capacity
• kilojoule per kilogram-kelvin kJ/(kg·K) · Specific heat capacity
• kilojoule per kilomole kJ/kmol · Molar energy
• kilojoule per kilomole kelvin kJ/(kmol·K) · Molar entropy
• kilojoule per millimeter kJ/mm · Energy per length
• kilojoule per mole kJ/mol · Molar energy
• kilojoule per mole kelvin kJ/(mol·K) · Molar entropy
• kilojoule per square meter kJ/m² · Energy per area
• kilokelvin kK · Temperature
• kiloliter kL · Volume
• kilometer km · Length
• kilometer per hour km/h · Speed
• kilometer per hour per second km/h/s · Acceleration
• kilometer per second km/s · Speed
• kilomole kmol · Amount of substance
• kilonewton kN · Force
• kilonewton meter kN·m · Torque
• kilonewton per cubic meter kN/m³ · Unit weight
• kilonewton per meter kN/m · Spring constant
• kilonewton second kN·s · Momentum
• kiloohm kΩ · Resistance
• kiloohm centimeter kΩ·cm · Electrical resistivity
• kiloparsec kpc · Length
• kilopascal kPa · Pressure
• kilopascal second kPa·s · Dynamic viscosity
• kilosiemens kS · Electrical conductance
• kiloton of TNT kt TNT · Energy
• kilotonne kt · Mass
• kilovolt kV · Voltage
• kilovolt per meter kV/m · Electric field strength
• kilovolt per mil kV/mil · Electric field strength
• kilovolt per millimeter kV/mm · Electric field strength
• kilowatt kW · Power
• kilowatt per Celsius degree kW/°C · Thermal conductance
• kilowatt per kelvin kW/K · Thermal conductance
• kilowatt per meter kW/m · Power per length
• kilowatt per meter-kelvin kW/(m·K) · Thermal conductivity
• kilowatt per square meter kW/m² · Intensity
• kilowatt per square meter kelvin kW/(m²·K) · Heat transfer coefficient
• kilowatt-hour kWh · Energy
• kilowatt-hour per cubic meter kWh/m³ · Energy per volume
• kilowatt-hour per kelvin kW·h/K · Heat capacity
• kilowatt-hour per kilogram kWh/kg · Specific energy, Specific latent heat
• kilowatt-hour per short ton kWh/ton · Specific energy
• kilowatt-hour per tonne kWh/t · Specific energy
• kip kip · Force
• kip foot kip·ft · Torque
• kip inch kip·in · Torque
• kip per foot kip/ft · Spring constant
• kip per inch kip/in · Spring constant
• kip per square inch ksi · Pressure
• kip per square inch root inch ksi·√in · Fracture toughness
• knot kn · Speed

L

• langley per minute Ly/min · Intensity
• league lea · Length
• light-minute lmin · Length
• light-second ls · Length
• light-year ly · Length
• line pairs per millimeter lp/mm · Wavenumber
• link li · Length
• liter L · Volume
• liter per day L/d · Volumetric flow rate
• liter per hectare L/ha · Volume per area
• liter per hour L/h · Volumetric flow rate
• liter per minute L/min · Volumetric flow rate
• liter per mole L/mol · Molar volume
• liter per second L/s · Volumetric flow rate
• litre per square metre per hour L/(m²·h) · Mass flux
• lunar distance LD · Length

M

• mach (sea level) Ma · Speed
• magnetic flux quantum Φ0 · Magnetic flux
• maxwell Mx · Magnetic flux
• mebibyte MiB · Information
• megaampere MA · Electric current
• megabecquerel MBq · Radioactivity
• megabit Mbit · Information
• megabyte MB · Information
• megaelectron volt MeV · Energy
• megaelectron volt per c MeV/c · Momentum
• megaelectronvolt per particle MeV/particle · Molar energy
• megahertz MHz · Frequency
• megajoule MJ · Energy
• megajoule per cubic meter MJ/m³ · Energy per volume
• megajoule per kelvin MJ/K · Heat capacity
• megajoule per kilogram MJ/kg · Specific energy, Specific latent heat
• megajoule per mole MJ/mol · Molar energy
• megajoule per square meter MJ/m² · Energy per area
• megakelvin MK · Temperature
• megameter Mm · Length
• meganewton MN · Force
• meganewton per meter MN/m · Spring constant
• megaohm MΩ · Resistance
• megaohm centimeter MΩ·cm · Electrical resistivity
• megaparsec Mpc · Length
• megapascal MPa · Pressure
• megapascal root meter MPa·√m · Fracture toughness
• megasiemens per meter MS/m · Electrical conductivity
• megaton of TNT Mt TNT · Energy
• megatonne Mt · Mass
• megavolt MV · Voltage
• megavolt per meter MV/m · Electric field strength
• megawatt MW · Power
• megawatt per kelvin MW/K · Thermal conductance
• megawatt per square centimeter MW/cm² · Intensity
• megawatt-hour MWh · Energy
• megayear Myr · Time
• meter m · Length
• meter of water column m H₂O · Pressure
• meter per day m/d · Speed
• meter per hour m/h · Speed
• meter per meter m/m · Strain, Slope
• meter per minute m/min · Speed
• meter per second m/s · Speed
• meter per second squared m/s² · Acceleration
• meter per year m/yr · Corrosion rate
• meter to the fourth m⁴ · Area moment of inertia
• metric carat ct · Mass
• metric horsepower PS · Power
• metric tonne t · Mass
• mho mho · Electrical conductance
• microampere μA · Electric current
• microampere per square centimeter µA/cm² · Current density
• microampere-hour μAh · Electric charge
• microarcsecond μas · Angle
• microbar μbar · Pressure
• microbarn μb · Area
• microcoulomb μC · Electric charge
• microcurie μCi · Radioactivity
• microfarad μF · Capacitance
• microgal μGal · Acceleration
• microgram μg · Mass
• microgram per kilogram of dry air μg/kg · Humidity ratio
• microgram per liter μg/L · Density, Concentration
• microgram per litre µg/L · Mass concentration
• microgram per millilitre µg/mL · Mass concentration
• microhenry μH · Inductance
• microhertz μHz · Frequency
• microinch per inch per Fahrenheit degree μin/(in·°F) · Thermal expansion coefficient
• microjoule µJ · Energy
• microkelvin μK · Temperature
• microkelvin (difference) μK · Temperature difference
• microliter μL · Volume
• micrometer μm · Length
• micrometer per year μm/yr · Corrosion rate
• micrometer to the fourth μm⁴ · Area moment of inertia
• micromho μmho · Electrical conductance
• micromho per centimeter μmho/cm · Electrical conductivity
• micromicrofarad μμF · Capacitance
• micromole μmol · Amount of substance
• micromole per kilogram μmol/kg · Molality
• micromole per liter μM · Molar concentration
• micromole per square meter second μmol/(m²·s) · Photon flux density
• micronewton μN · Force
• micronewton per meter μN/m · Surface tension
• microohm μΩ · Resistance
• microohm centimeter μΩ·cm · Electrical resistivity
• microohm meter μΩ·m · Electrical resistivity
• micropascal second μPa·s · Dynamic viscosity
• microradian μrad · Angle
• microreyn μreyn · Dynamic viscosity
• microsecond µs · Time
• microsiemens μS · Electrical conductance
• microsiemens per centimeter μS/cm · Electrical conductivity
• microsiemens per meter μS/m · Electrical conductivity
• microstrain µm/m · Strain
• microtesla μT · Magnetic flux density
• microvolt μV · Voltage
• microwatt μW · Power
• microwatt per kelvin μW/K · Thermal conductance
• microwatt per square centimeter μW/cm² · Intensity
• microwatt per square meter μW/m² · Intensity
• microweber μWb · Magnetic flux
• mil (NATO) mil · Angle
• mil per inch mil/in · Strain
• mil per year mpy · Corrosion rate
• mile mi · Length
• mile per hour mph · Speed
• mile per hour per second mph/s · Acceleration
• millennium mil · Time
• milli-Celsius degree (difference) mC° · Temperature difference
• milliampere mA · Electric current
• milliampere per square centimeter mA/cm² · Current density
• milliampere per square meter mA/m² · Current density
• milliampere square meter mA·m² · Magnetic moment
• milliampere-hour mAh · Electric charge
• milliampere-hour per mole mA·h/mol · Molar charge
• milliarcsecond mas · Angle
• millibar mbar · Pressure
• millibarn mb · Area
• millibecquerel mBq · Radioactivity
• millicoulomb mC · Electric charge
• millicurie mCi · Radioactivity
• millidiopter mdpt · Optical power
• milliequivalent per 100 grams meq/100 g · Molality
• milliequivalent per gram meq/g · Molality
• milliequivalent per liter meq/L · Molar concentration
• millifarad mF · Capacitance
• milligal mGal · Acceleration
• milligauss mG · Magnetic flux density
• milligram mg · Mass
• milligram per cubic meter mg/m³ · Density
• milligram per decilitre mg/dL · Mass concentration
• milligram per kilogram mg/kg · Concentration
• milligram per kilogram of dry air mg/kg · Humidity ratio
• milligram per liter mg/L · Density, Concentration
• milligram per litre mg/L · Mass concentration
• milligram per meter mg/m · Linear mass density
• milligram per millimole mg/mmol · Molar mass
• milligram per second mg/s · Mass flow rate
• millihenry mH · Inductance
• millihertz mHz · Frequency
• millijoule mJ · Energy
• millijoule per kelvin mJ/K · Heat capacity
• millijoule per square centimeter mJ/cm² · Energy per area
• millijoule per square meter mJ/m² · Surface tension
• millikelvin mK · Temperature
• millikelvin (difference) mK · Temperature difference
• milliliter mL · Volume
• milliliter per minute mL/min · Volumetric flow rate
• milliliter per mole mL/mol · Molar volume
• milliliter per second mL/s · Volumetric flow rate
• milliliter per square meter mL/m² · Volume per area
• millimeter mm · Length
• millimeter of depth mm · Volume per area
• millimeter of mercury mmHg · Pressure
• millimeter of water column mmH₂O · Pressure
• millimeter per day mm/day · Speed
• millimeter per hour mm/h · Speed
• millimeter per meter mm/m · Strain, Slope
• millimeter per minute mm/min · Speed
• millimeter per second mm/s · Speed
• millimeter per second squared mm/s² · Acceleration
• millimeter per year mm/yr · Speed, Corrosion rate
• millimeter to the fourth mm⁴ · Area moment of inertia
• millimho per centimeter mmho/cm · Electrical conductivity
• millimole mmol · Amount of substance
• millimole per gram mmol/g · Molality
• millimole per kilogram mmol/kg · Molality
• millimole per liter mM · Molar concentration
• millimole per square meter per day mmol/(m²·day) · Photon integral
• millimole per square meter second mmol/(m²·s) · Photon flux density
• millinewton mN · Force
• millinewton meter mN·m · Torque
• millinewton per meter mN/m · Spring constant, Surface tension
• millinewton second mN·s · Momentum
• milliohm mΩ · Resistance
• milliohm centimeter mΩ·cm · Electrical resistivity
• million BTU MMBTU · Energy
• million BTU per hour MMBTU/h · Power
• million imperial gallons per day MIGD · Volumetric flow rate
• million pounds per square inch Mpsi · Pressure
• million US gallons MG · Volume
• million US gallons per day MGD · Volumetric flow rate
• millipascal second mPa·s · Dynamic viscosity
• millipoise mP · Dynamic viscosity
• milliradian mrad · Angle
• milliradian per second mrad/s · Angular speed
• milliradian per second squared mrad/s² · Angular acceleration
• millisecond ms · Time
• millisiemens mS · Electrical conductance
• millisiemens per centimeter mS/cm · Electrical conductivity
• millisiemens per meter mS/m · Electrical conductivity
• millitesla mT · Magnetic flux density
• millitorr mTorr · Pressure
• millivolt mV · Voltage
• milliwatt mW · Power
• milliwatt per kelvin mW/K · Thermal conductance
• milliwatt per meter-kelvin mW/(m·K) · Thermal conductivity
• milliwatt per square centimeter mW/cm² · Intensity
• milliwatt per square meter mW/m² · Intensity
• milliweber mWb · Magnetic flux
• minute min · Time
• mole mol · Amount of substance
• mole per cubic decimeter mol/dm³ · Molar concentration
• mole per cubic meter mol/m³ · Molar concentration
• mole per kilogram (molal) mol/kg · Molality
• mole per liter (molar) M · Molar concentration
• mole per square meter per day mol/(m²·day) · Photon integral
• mole per square meter second mol/(m²·s) · Photon flux density
• molecule (single particle) molecules · Amount of substance
• month mo · Time

N

• nanoampere nA · Electric current
• nanocoulomb nC · Electric charge
• nanocurie nCi · Radioactivity
• nanofarad nF · Capacitance
• nanogram ng · Mass
• nanogram per liter ng/L · Concentration
• nanogram per millilitre ng/mL · Mass concentration
• nanohenry nH · Inductance
• nanohertz nHz · Frequency
• nanojoule nJ · Energy
• nanokelvin nK · Temperature
• nanometer nm · Length
• nanometer per year nm/yr · Corrosion rate
• nanometer to the fourth nm⁴ · Area moment of inertia
• nanomole nmol · Amount of substance
• nanomole per kilogram nmol/kg · Molality
• nanomole per liter nM · Molar concentration
• nanoohm nΩ · Resistance
• nanoohm meter nΩ·m · Electrical resistivity
• nanosecond ns · Time
• nanosiemens nS · Electrical conductance
• nanotesla nT · Magnetic flux density
• nanovolt nV · Voltage
• nanowatt nW · Power
• nanoweber nWb · Magnetic flux
• nautical mile nmi · Length
• neper Np · Sound level
• newton N · Force
• newton centimeter N·cm · Torque
• newton meter N·m · Torque
• newton meter second N·m·s · Angular momentum
• newton millimeter N·mm · Torque
• newton per centimeter N/cm · Spring constant
• newton per coulomb N/C · Electric field strength
• newton per cubic meter N/m³ · Unit weight
• newton per meter N/m · Spring constant, Surface tension
• newton per millimeter N/mm · Spring constant
• newton second N·s · Momentum
• normal (equivalent per liter) N · Molar concentration
• nuclear magneton μ_N · Magnetic moment

O

• ohm Ω · Resistance
• ohm centimeter Ω·cm · Electrical resistivity
• ohm circular mil per foot Ω·cmil/ft · Electrical resistivity
• ohm meter Ω·m · Electrical resistivity
• ohm square millimeter per meter Ω·mm²/m · Electrical resistivity
• oil barrel bbl · Volume
• ounce oz · Mass
• ounce per square yard oz/yd² · Mass per area
• ounce square inch oz·in² · Moment of inertia
• ounce-force ozf · Force
• ounce-force inch ozf·in · Torque

P

• parsec pc · Length
• part per billion ppb · Dimensionless
• part per billion by volume (moisture) ppbv · Humidity ratio
• part per million ppm · Dimensionless
• part per million by volume ppmv · Concentration
• part per million by volume (moisture) ppmv · Humidity ratio
• part per million per Celsius degree ppm/°C · Thermal expansion coefficient
• part per million per Fahrenheit degree ppm/°F · Thermal expansion coefficient
• part per million per kelvin ppm/K · Thermal expansion coefficient
• part per thousand ppth · Concentration
• part per trillion ppt · Concentration, Dimensionless
• parts per billion ppb · Concentration
• parts per million ppm · Concentration
• pascal Pa · Pressure
• pascal root meter Pa·√m · Fracture toughness
• pascal second Pa·s · Dynamic viscosity
• pennyweight dwt · Mass
• per acre per ac · Number per area, Cost per area
• per acre-foot $/ac·ft · Cost per volume
• per angstrom Å⁻¹ · Wavenumber
• per Celsius degree 1/°C · Thermal expansion coefficient
• per cent mille pcm · Dimensionless
• per centimeter (kayser) cm⁻¹ · Wavenumber
• per cubic angstrom Å⁻³ · Number density
• per cubic centimeter cm⁻³ · Number density
• per cubic foot ft⁻³ · Number density, Cost per volume
• per cubic meter m⁻³ · Number density, Cost per volume
• per cubic millimeter mm⁻³ · Number density
• per day 1/d · Frequency
• per dekatherm $/dth · Cost per energy
• per Fahrenheit degree 1/°F · Thermal expansion coefficient
• per foot ft⁻¹ · Wavenumber
• per gigajoule $/GJ · Cost per energy
• per gram $/g · Cost per mass
• per hectare per ha · Number per area, Cost per area
• per hour 1/h · Frequency
• per hundred cubic feet $/CCF · Cost per volume
• per hundredweight $/cwt · Cost per mass
• per imperial gallon $/imp gal · Cost per volume
• per inch in⁻¹ · Wavenumber
• per joule $/J · Cost per energy
• per kelvin 1/K · Thermal expansion coefficient
• per kilogram $/kg · Cost per mass
• per kilometer km⁻¹ · Wavenumber
• per kilowatt-hour $/kWh · Cost per energy
• per liter L⁻¹ · Number density, Cost per volume
• per megajoule $/MJ · Cost per energy
• per megawatt-hour $/MWh · Cost per energy
• per meter m⁻¹ · Wavenumber
• per microliter μL⁻¹ · Number density
• per micrometer μm⁻¹ · Wavenumber
• per mille per mille · Dimensionless, Slope
• per milliliter mL⁻¹ · Number density
• per millimeter mm⁻¹ · Wavenumber
• per million BTU $/MMBTU · Cost per energy
• per nanometer nm⁻¹ · Wavenumber
• per oil barrel $/bbl · Cost per volume
• per ounce $/oz · Cost per mass
• per pound $/lb · Cost per mass
• per Rankine degree 1/°R · Thermal expansion coefficient
• per short ton $/short ton · Cost per mass
• per square foot per ft² · Number per area
• per square meter per m² · Number per area, Cost per area
• per therm $/therm · Cost per energy
• per thousand cubic feet $/Mcf · Cost per volume
• per thousand liters $/1000 L · Cost per volume
• per thousand square feet per 1000 ft² · Number per area, Cost per area
• per thousand US gallons $/1000 gal · Cost per volume
• per tonne $/t · Cost per mass
• per troy ounce $/oz t · Cost per mass
• per US gallon $/gal · Cost per volume
• per year 1/yr · Frequency
• percent % · Concentration, Dimensionless
• percent by volume % v/v · Concentration
• percent by weight % w/w · Concentration
• percent grade % · Slope
• percent IACS %IACS · Electrical conductivity
• percent per Celsius degree %/°C · Thermal expansion coefficient
• percent per Fahrenheit degree %/°F · Thermal expansion coefficient
• percent strain % · Strain
• percent weight per volume % w/v · Concentration
• petabecquerel PBq · Radioactivity
• petahertz PHz · Frequency
• petajoule PJ · Energy
• pica pc · Length
• picoampere pA · Electric current
• picocoulomb pC · Electric charge
• picocurie pCi · Radioactivity
• picofarad pF · Capacitance
• picogram pg · Mass
• picohenry pH · Inductance
• picometer pm · Length
• picomole pmol · Amount of substance
• picomole per liter pM · Molar concentration
• picosecond ps · Time
• picosiemens pS · Electrical conductance
• picotesla pT · Magnetic flux density
• picovolt pV · Voltage
• Planck constant h · Angular momentum
• Planck length lP · Length
• Planck time tP · Time
• point pt · Length
• poise P · Dynamic viscosity
• pound lb · Mass
• pound foot per second lb·ft/s · Momentum
• pound per acre lb/ac · Mass per area
• pound per cubic foot lb/ft³ · Density
• pound per cubic inch lb/in³ · Density
• pound per cubic yard lb/yd³ · Density
• pound per day lb/d · Mass flow rate
• pound per foot lb/ft · Linear mass density
• pound per foot hour lb/(ft·h) · Dynamic viscosity
• pound per foot second lb/(ft·s) · Dynamic viscosity
• pound per hour lb/h · Mass flow rate
• pound per imperial gallon lb/imp gal · Density
• pound per inch lb/in · Linear mass density
• pound per minute lb/min · Mass flow rate
• pound per pound of dry air lb/lb · Humidity ratio
• pound per pound-mole lb/lb-mol · Molar mass
• pound per second lb/s · Mass flow rate
• pound per square foot lb/ft² · Pressure, Mass per area
• pound per square foot per hour lb/(ft²·h) · Mass flux
• pound per square foot per second lb/(ft²·s) · Mass flux
• pound per square inch psi · Pressure
• pound per square inch root inch psi·√in · Fracture toughness
• pound per thousand square feet lb/1000 ft² · Mass per area
• pound per US gallon lb/gal · Density
• pound per yard lb/yd · Linear mass density
• pound per year lb/yr · Mass flow rate
• pound square foot lb·ft² · Moment of inertia
• pound square foot per second lb·ft²/s · Angular momentum
• pound square inch lb·in² · Moment of inertia
• pound-force lbf · Force
• pound-force foot second squared lbf·ft·s² · Moment of inertia
• pound-force inch second squared lbf·in·s² · Moment of inertia
• pound-force per cubic foot lbf/ft³ · Unit weight
• pound-force per cubic inch lbf/in³ · Unit weight
• pound-force per cubic yard lbf/yd³ · Unit weight
• pound-force per foot lbf/ft · Spring constant, Surface tension
• pound-force per inch lbf/in · Spring constant, Surface tension
• pound-force second lbf·s · Momentum
• pound-force second per square foot lbf·s/ft² · Dynamic viscosity
• pound-mole lb-mol · Amount of substance
• poundal pdl · Force
• poundal foot pdl·ft · Torque

Q

• quad quad · Energy
• quadrant quad · Angle
• quintal q · Mass

R

• radian rad · Angle
• radian per minute rad/min · Angular speed
• radian per minute squared rad/min² · Angular acceleration
• radian per second rad/s · Angular speed
• radian per second squared rad/s² · Angular acceleration
• Rankine degree (difference) R° · Temperature difference
• Rankine hour per BTU °R·h/BTU · Thermal resistance
• ratio Dimensionless
• Réaumur degree (difference) Ré° · Temperature difference
• reciprocal meter 1/m · Optical power
• reduced Planck constant hbar · Angular momentum
• revolution rev · Angle
• revolution per day rev/d · Angular speed
• revolution per hour rev/h · Angular speed
• revolution per minute rpm · Frequency, Angular speed
• revolution per minute squared rev/min² · Angular acceleration
• revolution per second rev/s · Frequency, Angular speed
• revolution per second squared rev/s² · Angular acceleration
• reyn reyn · Dynamic viscosity
• rod rd · Length
• rood rood · Area
• rpm per second rpm/s · Angular acceleration
• rutherford Rd · Radioactivity

S

• second s · Time
• shake shake · Time
• short ton per acre ton/ac · Mass per area
• sidereal day sd · Time
• siemens S · Electrical conductance
• siemens per centimeter S/cm · Electrical conductivity
• siemens per meter S/m · Electrical conductivity
• slug slug · Mass
• slug foot per second slug·ft/s · Momentum
• slug per cubic foot slug/ft³ · Density
• slug per foot slug/ft · Linear mass density
• slug square foot slug·ft² · Moment of inertia
• slug square foot per second slug·ft²/s · Angular momentum
• solar luminosity Lsun · Power
• solar mass Msun · Mass
• solar mass parameter GMsun · Standard gravitational parameter
• solar radius Rsun · Length
• speed of light c · Speed
• square centimeter cm² · Area
• square centimeter Celsius per watt cm²·°C/W · Areal thermal resistance
• square centimeter per second cm²/s · Diffusivity
• square chain ch² · Area
• square decimeter dm² · Area
• square foot ft² · Area
• square foot per day ft²/d · Diffusivity
• square foot per hour ft²/h · Diffusivity
• square foot per second ft²/s · Diffusivity
• square inch in² · Area
• square inch hour Fahrenheit per BTU in²·h·°F/BTU · Areal thermal resistance
• square inch per second in²/s · Diffusivity
• square kilometer km² · Area
• square meter m² · Area
• square meter Celsius per watt m²·°C/W · Areal thermal resistance
• square meter hour Celsius per kilocalorie m²·h·°C/kcal · Areal thermal resistance
• square meter kelvin per watt RSI (m²·K/W) · Areal thermal resistance
• square meter per day m²/d · Diffusivity
• square meter per hour m²/h · Diffusivity
• square meter per second m²/s · Diffusivity, Area per time
• square meter per year m²/yr · Diffusivity
• square micrometer μm² · Area
• square micrometer per second μm²/s · Diffusivity
• square mile mi² · Area
• square millimeter mm² · Area
• square millimeter kelvin per watt mm²·K/W · Areal thermal resistance
• square millimeter per second mm²/s · Diffusivity
• square nanometer nm² · Area
• square rod rd² · Area
• square yard yd² · Area
• standard gravity g · Acceleration
• Standard Reference Method SRM · Beer colour
• stokes St · Diffusivity
• stone st · Mass

T

• tebibyte TiB · Information
• terabecquerel TBq · Radioactivity
• terabit Tbit · Information
• terabyte TB · Information
• teraelectron volt TeV · Energy
• terahertz THz · Frequency
• terajoule TJ · Energy
• teraohm TΩ · Resistance
• terawatt TW · Power
• terawatt-hour TWh · Energy
• terrestrial mass parameter GMearth · Standard gravitational parameter
• tesla T · Magnetic flux density
• tex tex · Linear mass density
• therm therm · Energy
• thou thou · Length
• thousand BTU per hour MBH · Power
• thousand circular mils kcmil · Area
• thousand cubic millimeters 10³ mm³ · Section modulus
• thousand pounds per hour klb/h · Mass flow rate
• thousand revolutions per minute krpm · Angular speed
• tog tog · Areal thermal resistance
• ton of refrigeration ton · Power
• ton of TNT t TNT · Energy
• tonne meter per second t·m/s · Momentum
• tonne of oil equivalent toe · Energy
• tonne per cubic meter t/m³ · Density
• tonne per day t/d · Mass flow rate
• tonne per hectare t/ha · Mass per area
• tonne per hour t/h · Mass flow rate
• tonne per year t/yr · Mass flow rate
• tonne square meter t·m² · Moment of inertia
• tonne-force tf · Force
• torr Torr · Pressure
• troy ounce oz t · Mass
• troy pound lb t · Mass
• tsubo tsubo · Area

U

• UK long hundredweight cwt (UK) · Mass
• UK long ton long ton · Mass
• UK long ton-force tonf (UK) · Force
• unified atomic mass unit (dalton) u · Mass
• unitless Unitless
• US beer barrel bbl beer · Volume
• US bushel bu · Volume
• US cup cup · Volume
• US fluid ounce fl oz · Volume
• US gallon gal · Volume
• US gallon per acre gal/ac · Volume per area
• US gallon per day gpd · Volumetric flow rate
• US gallon per hour gph · Volumetric flow rate
• US gallon per minute gpm · Volumetric flow rate
• US gallon per thousand square feet gal/1000 ft² · Volume per area
• US hundredweight cwt · Mass
• US pint pt · Volume
• US quart qt · Volume
• US short ton ton · Mass
• US short ton per cubic yard ton/yd³ · Density
• US short ton per day stpd · Mass flow rate
• US short ton per hour stph · Mass flow rate
• US short ton-force tonf · Force
• US short ton-force per cubic yard tonf/yd³ · Unit weight
• US survey foot ftUS · Length
• US tablespoon tbsp · Volume
• US teaspoon tsp · Volume

V

• volt V · Voltage
• volt per centimeter V/cm · Electric field strength
• volt per meter V/m · Electric field strength
• volt per mil V/mil · Electric field strength
• volt per millimeter V/mm · Electric field strength

W

• watt W · Power
• watt per Celsius degree W/°C · Thermal conductance
• watt per centimeter-kelvin W/(cm·K) · Thermal conductivity
• watt per foot W/ft · Power per length
• watt per kelvin W/K · Thermal conductance
• watt per meter W/m · Power per length
• watt per meter-Celsius W/(m·°C) · Thermal conductivity
• watt per meter-kelvin W/(m·K) · Thermal conductivity
• watt per millimeter W/mm · Power per length
• watt per square centimeter W/cm² · Intensity
• watt per square centimeter kelvin W/(cm²·K) · Heat transfer coefficient
• watt per square meter W/m² · Intensity
• watt per square meter Celsius W/(m²·°C) · Heat transfer coefficient
• watt per square meter kelvin W/(m²·K) · Heat transfer coefficient
• watt-hour Wh · Energy
• watt-hour per cubic inch Wh/in³ · Energy per volume
• watt-hour per kelvin W·h/K · Heat capacity
• watt-hour per kilogram Wh/kg · Specific energy, Specific latent heat
• watt-hour per liter Wh/L · Energy per volume
• weber Wb · Magnetic flux
• week wk · Time

Y

• yard yd · Length
• year yr · Time