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Dimensionless quantity unitsgrouping · 76

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Units of measure grouped by quantity kind: dimensionless quantity.

Members (76)

LabelNotationUCUM codeDefinition
decibel2NdB
kilopascal square metre per gram33kPa.m2.g-1
kilopascal per millimetre34kPa.mm-1
millilitre per square centimetre second35mL.cm-2.s-1
cubic foot per minute per square foot36[cft_i].min-1.[sft_i]-1Conversion factor required
ampere square metre per joule secondA10A.m2.J-1.s-1
British thermal unit (international table) per second square foot degree RankineA20[Btu_IT].s-1.[ft_i]-2.[degR]-1
British thermal unit (international table) per hour square foot degree RankineA23[Btu_IT].h-1.[ft_i]-2.[degR]-1
cubic metre per coulombA38m3.C-1
neperC50Np
neper per secondC51Np.s-1
oneC62Synonym: unit
pascal per kelvinC64Pa.K-1
reciprocal kelvin or kelvin to the power minus oneC91/K
reciprocal metreC92/m
reciprocal secondC97/s
square metre per kilogramD21m2.kg-1
square metre per moleD22m2.mol-1
calorie (thermochemical) per second square centimetre kelvinD39cal_th.s-1.cm-2.K-1
volt per kelvinD48V.K-1
millivolt per kelvinD49
watt per square metre kelvinD55W.m-2.K-1
calorie (international table) per second square centimetre kelvinD72cal_IT.s-1.cm-2.K-1
hectopascal per barE99hPa.bar-1
kilopascal per barF03kPa.bar-1
millibar per barF04mbar.bar-1
megapascal per barF05MPa.bar-1
pascal per barF07Pa.bar-1
bar per kelvinF81bar.K-1
hertz metreH34Hz.m
megahertz kilometreH39MHz.m
pascal per metreH42Pa.m-1
cubic metre per cubic metreH60m3.m-3
picopascal per kilometreH69pPa.km-1
microgram per kilogramJ33ug.kg-1
microlitre per litreJ36uL.L-1
bar per barJ56bar.bar-1
cubic centimetre per cubic metreJ87cm3.m-3
cubic decimetre per cubic metreJ91dm3.m-3
litre per litreK62L.L-1
millilitre per litreL19mL.L-1
cubic millimetre per cubic metreL21mm3.m-3
nanogram per kilogramL32ng.kg-1
psi per psiL52[psi].[psi]-1
kilohertz metreM17kHz.m
gigahertz metreM18GHz.m
reciprocal megakelvin or megakelvin to the power minus oneM20
reciprocal kilovolt - ampere reciprocal hourM21
megahertz metreM27MHz.m
kilogram per kilogramM29kg.kg-1
reciprocal volt - ampere reciprocal secondM30
belM72BLogarithmic relationship to base 10.
pound per poundM91[lb_av].[lb_av]-1Proportion of the mass consisting of the avoirdupois pound according to the avoirdupois unit system divided by the avoirdupois pound according to the avoirdupois unit system.
cubic metre per secondMQSm3.s-1
square metreMTKm2
metreMTRm
British thermal unit (international table) per hour square foot degree FahrenheitN74[Btu_IT].h-1.[ft_i]-2.[degF]-1Unit of the heat transition coefficient according to the Imperial system of units.
British thermal unit (thermochemical) per hour square foot degree FahrenheitN75[Btu_th].h-1.[ft_i]-2.[degF]-1Unit of the heat transition coefficient according to the imperial system of units.
British thermal unit (international table) per second square foot degree FahrenheitN76[Btu_IT].s-1.[ft_i]-2.[degF]-1Unit of the heat transition coefficient according to the imperial system of units.
British thermal unit (thermochemical) per second square foot degree FahrenheitN77[Btu_th].s-1.[ft_i]-2.[degF]-1Unit of the heat transition coefficient according to the imperial system of units.
kilowatt per square metre kelvinN78kW.m-2.K-11000-fold of the derived SI unit watt divided by the product of the power of the SI base unit metre by exponent 2 and the SI base unit kelvin.
reciprocal jouleN91/JReciprocal of the derived SI unit joule.
milligram per kilogramNAmg.kg-1
decade (logarithmic)P411 Dec := log2 10 ˜ 3,32 according to the logarithm for frequency range between f1 and f2, when f2/f1 = 10.
pascal square metre per kilogramP79Pa.m2.kg-1Unit of the burst index as derived unit for pressure pascal related to the substance, represented as a quotient from the SI base unit kilogram divided by the power of the SI base unit metre by exponent 2.
millipascal per metreP80mPa.m-10,001-fold of the derived SI unit pascal divided by the SI base unit metre.
kilopascal per metreP81kPa.m-11000-fold of the derived SI unit pascal divided by the SI base unit metre.
hectopascal per metreP82hPa.m-1100-fold of the derived SI unit pascal divided by the SI base unit metre.
standard atmosphere per metreP83atm.m-1Outdated unit of the pressure divided by the SI base unit metre.
technical atmosphere per metreP84att.m-1Obsolete and non-legal unit of the pressure which is generated by a 10 metre water column divided by the SI base unit metre.
torr per metreP85CGS (Centimetre-Gram-Second system) unit of the pressure divided by the SI base unit metre.
psi per inchP86[psi].[in_i]-1Compound unit for pressure (pound-force according to the Anglo-American unit system divided by the power of the unit inch according to the Anglo-American and Imperial system of units with the exponent 2) divided by the unit inch according to the Anglo-American and Imperial system of units .
cubic metre per second square metreP87m3.s-1.m-2Unit of volume flow cubic meters by second related to the transmission surface in square metres.
microgram per hectogramQ29Microgram per hectogram.
pH (potential of Hydrogen)Q30The activity of the (solvated) hydrogen ion (a logarithmic measure used to state the acidity or alkalinity of a chemical solution).
square metre per secondS4m2.s-1Synonym: metre squared per second (square metres/second US)
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