quantity_ext library
Extends the core library with nonSI units, constants, unit synonyms to enable terse constructors and expressions, and auxiliary functions.
Classes
 MutableQuantity

MutableQuantity supports updates to its value, dimensions and uncertainty.
Changes are broadcast over the
onChange
stream.
Constants
 alphaParticleMass → const Mass
 The rest mass of a helium nucleus.
 angstromStar → const Length
 Often used to represent the wavelengths of X rays and the distances between atoms in crystals.
 atomicMass → const Mass
 One twelfth of the mass of a carbon12 atom in its nuclear and electronic ground state.
 bohrRadius → const Length
 The mean radius of the orbit of an electron around the nucleus of a hydrogen atom at its ground state.
 boltzmannConstant → const Entropy
 The Boltzmann constant is a physical constant that relates the average relative kinetic energy of particles in a gas with the temperature of the gas.
 characteristicImpedanceOfVacuum → const Resistance
 Relates the magnitudes of the electric and magnetic fields of electromagnetic radiation travelling through free space.
 classicalElectronRadius → const Length
 The classical electron radius is a combination of fundamental physical quantities that define a length scale for problems involving an electron interacting with electromagnetic radiation.
 comptonWavelength → const Length
 The wavelength of a photon whose energy is the same as the mass energy equivalent of that particle.
 conductanceQuantum → const Conductance
 The quantized unit of electrical conductance. It appears when measuring the conductance of a quantum point contact, and, more generally, is a key component of Landauer formula which relates the electrical conductance of a quantum conductor to its quantum properties.
 cos0 → const double
 The cosine of a ninety degree angle (1).
 cos60 → const double
 The cosine of a sixty degree angle (0.5).
 cos90 → const double
 The cosine of a ninety degree angle (1).
 deuteronMass → const Mass
 The mass of a stationary deuteron.
 electronGFactor → const Scalar
 Electron g factor (ge).
 electronMass → const Mass
 The mass of a stationary electron.
 elementaryCharge → const Charge
 The electric charge carried by a single proton.
 fineStructureConstant → const Scalar
 Fine structure constant (alpha).
 fiveNinths → const double
 A ratio used in the conversion between metric temperature scales and Fahrenheit.
 hartreeEnergy → const Energy
 The Hartree atomic unit of energy is the energy for the separation of a molecule to nuclei and electrons.
 hBar → const AngularMomentum
 The Planck constant divided by 2 PI (a.k.a., 'hbar' or 'reduced Planck constant').
 helionMass → const Mass
 The mass of a stationary helion.
 lengthZero → const Length
 A constant representing zero length.
 magneticFluxQuantum → const MagneticFlux
 The magnetic flux quantum constant is a combination of two other physical constants: the Planck constant h and the electron charge e. Its value is, therefore, the same for any superconductor.
 muonGFactor → const Scalar
 Muon g factor (gn).
 muonMass → const Mass
 The mass of a stationary muon particle.
 naught → const Scalar
 A synonym for zero.
 neutronGFactor → const Scalar
 Neutron g factor (gn).
 neutronMass → const Mass
 The mass of a stationary neutron.
 planckConstant → const AngularMomentum
 The Planck constant.
 planckLength → const Length
 The threshold length at which classical ideas about gravity and spacetime cease to be valid and quantum effects dominate.
 planckMass → const Mass
 The unit of mass in the system of natural units known as Planck units. It is approximately 0.02 milligrams.
 planckTemperature → const Temperature
 Contemporary models of physical cosmology postulate that the highest possible temperature is the Planck temperature.
 planckTime → const Time
 The time required for light to travel in a vacuum a distance of one Planck length.
 protonGFactor → const Scalar
 Proton g factor (gp).
 protonMass → const Mass
 The mass of a stationary proton.
 sackurTetrode100kPa → const Scalar
 SackurTetrode constant at 1 K and 100 kPa ('S0/R').
 sackurTetrodeStdAtm → const Scalar
 SackurTetrode constant at 1 K and 101.325 kPa ('S0/R').
 scalarZero → const Scalar
 Zero, as a Scalar.
 sigma0 → const Area
 A synonym for the thomsonCrossSection.
 sin0 → const double
 The sine of a zero degree angle (0).
 sin30 → const double
 The sine of a thirty degree angle (0.5).
 sin90 → const double
 The sine of a ninety degree angle (1).
 solarLuminosity → const Power
 The solar luminosity constant is the radiant flux (power emitted in the form of photons) emitted by the Sun (a typical value; the Sun's output actually varies slightly over time).
 speedOfLightVacuum → const Speed
 Speed of light in a vacuum.
 speedOfSoundAir0C → const Speed
 Speed of sound in air at 0 deg C.
 tan0 → const double
 The tangent of a zero degree angle (0).
 tan45 → const double
 The tangent of a forty five degree angle (1).
 tau → const double
 The "circle constant", equal to two pi.
 tauComptonWavelength → const Length
 The tau Compton wavelength.
 tauMass → const Mass
 The mass of a stationary tau particle.
 thomsonCrossSection → const Area
 Helpful for describing the scattering of photons when the energy of each individual photon is much smaller than the rest energy of the electron.
 vacuumElectricPermittivity → const Permittivity
 A constant of proportionality that exists between electric displacement and electric field intensity.
 vacuumMagneticPermeability → const Permeability
 The magnetic permeability in a classical vacuum.
 vonKlitzingConstant → const Resistance
 Relates Planck's constant and the charge of the electron.
 weakMixingAngle → const Scalar
 Weak mixing angle.
 Z0 → const Resistance
 A synonym for characteristicImpedanceOfVacuum.
 zilch → const Scalar
 A synonym for zero.
Properties
 abamperes → CurrentUnits

Abamperes as a unit.
final
 abcoulombs → ChargeUnits

A synonym for dekacoulombs.
final
 abfarads → CapacitanceUnits

A unit representing one gigafarad.
final
 abhenries ↔ InductanceUnits

Abhenries is a synonym for nanohenries.
getter/setter pair
 abmho → ConductanceUnits

Equivalent to a billion siemens (or mhos).
final
 abvolts ↔ ElectricPotentialDifferenceUnits

The unit of electromotive force (EMF) or potential difference in the CGS (centimeter/gram/second)
electromagnetic system of units. When an EMF of 1 abV exists between two points, then one erg of energy
is needed to move one abcoulomb (1 abC) of charge carriers between those two points.
getter/setter pair
 acreFoot ↔ VolumeUnits

Acre foot as a unit.
getter/setter pair
 acres → AreaUnits

An acre is about threequarters of the size of an American football field.
final
 aeons → TimeUnits

A unit of one billion years.
final
 ampereHours → ChargeUnits

Ampere hours as a unit.
final
 amperes → CurrentUnits

The standard SI unit.
final
 amps → CurrentUnits

A synonym for amperes.
final
 angle0 → Angle

A zero degree angle.
final
 angle180 → Angle

A one hundred eighty degree angle.
final
 angle270 → Angle

A two hundred seventy degree angle.
final
 angle30 → Angle

A thirty degree angle.
final
 angle360 → Angle

A three hundred sixty degree angle.
final
 angle45 → Angle

A forty five degree angle.
final
 angle60 → Angle

A sixty degree angle.
final
 angle90 → Angle

A ninety degree angle.
final
 anglePi → Angle

A one hundred eighty degree angle.
final
 angleTau → Angle

A three hundred sixty degree angle.
final
 angstromStars → LengthUnits

A nonstandard unit of length.
final
 angularMils → AngleUnits

One angular mil is 0.05625 of a degree, exactly.
final
 ares → AreaUnits

Accepted for use with the SI, subject to further review.
Equals one square dekameter, or 100 square meters.
final
 astronomicalUnits → LengthUnits

The mean distance from the center of the earth to the center of the sun.
final
 atmospheres ↔ PressureUnits

Standard atmospheres as a unit.
getter/setter pair
 atmospheresTechnical ↔ PressureUnits

Technical atmospheres as a unit.
getter/setter pair
 attometers → LengthUnits

A unit of 10^18 meters.
final
 attoseconds → TimeUnits

10^18 of a second.
final
 B → TimeInstantUnits

Besselian  Replaced by Julian system, but still of occasional use
final
 bakersDozen → ScalarUnits

A baker's dozen is 13. One extra donut. Thank you.
final
 barns → AreaUnits

Accepted for use with the SI, subject to further review.
Equals 100 square femtometers, or 1.0e28 square meters.
final
 barrels ↔ VolumeUnits

Barrels as a unit.
getter/setter pair
 barrelsPetroleum ↔ VolumeUnits

Barrels petroleum as a unit.
getter/setter pair
 bars ↔ PressureUnits

Shorthand bars unit.
getter/setter pair
 baryes ↔ PressureUnits

Baryes as a unit.
getter/setter pair
 billionEur → ScalarUnits

The European variant of one billion (10^12) as a unit.
final
 billionthsUS → ScalarUnits

One billionth (US: 10^9) as a unit.
final
 billionUS → ScalarUnits

One billion (US: 10^9) as a unit.
final
 bits → InformationUnits

The standard SI unit.
final
 boardFeet ↔ VolumeUnits

Board feet as a unit.
getter/setter pair
 boltzmannUnit → EntropyUnits

Boltzmann constant as a unit.
final
 btu39 → EnergyUnits

39 degree Fahrenheit BTUs as a unit.
final
 btu60 → EnergyUnits

60 degree Fahrenheit BTUs as a unit.
final
 btuInternationalTable → EnergyUnits

International Table BTUs as a unit.
final
 btuMean → EnergyUnits

Mean BTUs as a unit.
final
 btuThermo → EnergyUnits

Thermochemical BTUs as a unit.
final
 btuThermsPerHour ↔ PowerUnits

Square degrees as a unit.
getter/setter pair
 btuThermsPerSecond ↔ PowerUnits

Thermochemical BTUs per second as a unit.
getter/setter pair
 bushels ↔ VolumeUnits

Bushels as a unit.
getter/setter pair
 bytes → InformationUnits

Units of 8 bits.
final
 cables → LengthUnits

A nonstandard unit of length.
final
 calibers → LengthUnits

A nonstandard unit of length.
final
 calories15 → EnergyUnits

15 degree Celsius calories as a unit.
final
 calories20 → EnergyUnits

20 degree Celsius calories as a unit.
final
 caloriesInternationalTable → EnergyUnits

International Table calories as a unit.
final
 caloriesKgInternationalTable → EnergyUnits

International Table kilogram calories as a unit.
final
 caloriesKgMean → EnergyUnits

Mean kilogram calories as a unit.
final
 caloriesKgThermo → EnergyUnits

Thermochemical kilogram calories as a unit.
final
 caloriesMean → EnergyUnits

Mean calories as a unit.
final
 caloriesThermo → EnergyUnits

Thermochemical calories as a unit.
final
 caloriesThermoPerSecond ↔ PowerUnits

Thermochemical calories as a unit.
getter/setter pair
 candelas → LuminousIntensityUnits

The standard SI unit.
final
 caratsMetric → MassUnits

Metric carats as a unit.
final
 centimeters → LengthUnits

A unit of one hundredth of a meter.
final
 centiseconds → TimeUnits

A hundredth of a second.
final
 centistokes ↔ KinematicViscosityUnits

Centistokes as a unit.
getter/setter pair
 chainsEngineer → LengthUnits

A nonstandard unit of length.
final
 chainsSurveyor → LengthUnits

A nonstandard unit of length.
final
 circles → AngleUnits

Synonymous with revolutions.
final
 circularMils → AreaUnits

Equal to the area of a circle with a diameter of one mil (one thousandth of an inch).
It is often used for representing the area of a wire's circular cross section.
final
 clausius → EntropyUnits

The erg per clausius unit of entropy.
final
 cmMercury0 ↔ PressureUnits

Centimeters of mercury at 0 degrees Celsius.
getter/setter pair
 cmWater4 ↔ PressureUnits

Centimeters of water at 4 degrees Celsius.
getter/setter pair
 cords ↔ VolumeUnits

Cords as a unit.
getter/setter pair
 cos30 → double

The cosine of a thirty degree angle.
final
 cos45 → double

The cosine of a forty five degree angle.
final
 coulombs → ChargeUnits

The standard SI unit.
final
 cubicCentimeters ↔ VolumeUnits

Cubic centimeters as a unit.
getter/setter pair
 cubicFeet ↔ VolumeUnits

Barrels as a unit.
getter/setter pair
 cubicInches ↔ VolumeUnits

Cubic inches as a unit.
getter/setter pair
 cubicMeters ↔ VolumeUnits

The standard SI unit.
getter/setter pair
 cubicMetersPerSecond ↔ VolumeFlowRateUnits

The standard SI unit, tersely.
getter/setter pair
 cubicParsecs ↔ VolumeUnits

Cubic parsecs as a unit.
getter/setter pair
 cubicYards ↔ VolumeUnits

Cubic yards as a unit.
getter/setter pair
 cubits → LengthUnits

A nonstandard unit of length.
final
 cumecs ↔ VolumeFlowRateUnits

Shorthand synonym for standard SI unit.
getter/setter pair
 cups ↔ VolumeUnits

Cups as a unit.
getter/setter pair
 cycles → AngleUnits

Synonymous with revolutions.
final
 days → TimeUnits

Accepted for use with the SI.
final
 daysMeanSolar → TimeUnits

Accepted for use with the SI.
final
 daysSidereal → TimeUnits

A sidereal day is the time between two consecutive transits of the First Point of Aries. It represents the time
taken by the Earth to rotate on its axis relative to the stars, and is almost four minutes shorter than the solar
day because of the Earth's orbital motion.
final
 decillionEur → ScalarUnits

The European variant of one decillion (10^60) as a unit.
final
 decillionUS → ScalarUnits

One decillion (US: 10^33) as a unit.
final
 decimeters → LengthUnits

A unit of one tenth of a meter.
final
 deciseconds → TimeUnits

A tenth of a second.
final
 deg → AngleUnits

Synonymous with degrees.
final
 degF → TemperatureIntervalUnits

A synonym for degreesFahrenheit.
final
 degK → TemperatureIntervalUnits

A synonym for degrees Kelvin.
final
 degR → TemperatureIntervalUnits

A synonym for degreesRankine.
final
 degrees → AngleUnits

A terse version of Angle.degrees.
final
 degreesCelsius → TemperatureUnits

Degrees in the Celsius scale.
final
 degreesFahrenheit → TemperatureIntervalUnits

Degrees in the Fahrenheit scale.
final
 degreesPerSecond → AngularSpeedUnits

Accepted for use with the SI.
final
 degreesRankine → TemperatureIntervalUnits

Degrees in the Rankine scale.
final
 dekameters → LengthUnits

A unit of ten meters.
final
 dekaseconds → TimeUnits

Ten seconds.
final
 dozen → ScalarUnits

A dozen is 12.
final
 drams ↔ VolumeUnits

Drams as a unit.
getter/setter pair
 dramsApothecary → MassUnits

Apothecary drams as a unit.
final
 dramsAvoirdupois → MassUnits

Avoirdupois drams as a unit.
final
 duotrigintillion → ScalarUnits

One duotrigintillion (10^99) as a unit.
final
 dynes ↔ ForceUnits

Dynes as a unit.
getter/setter pair
 electronVolts → EnergyUnits

Accepted for use with the SI.
final
 emuCapacitance → CapacitanceUnits

Electromagnetic unit (emu), the capacity of a circuit component to store charge.
final
 emuOfInductance ↔ InductanceUnits

EMU of inductance is a synonym for nanohenries.
getter/setter pair
 emuPotential ↔ ElectricPotentialDifferenceUnits

Synonymous with abvolts.
getter/setter pair
 eons → TimeUnits

A synonym for aeons.
final
 ergPerKelvin → EntropyUnits

The erg per kelvin unit of entropy.
final
 ergs → EnergyUnits

Ergs as a unit.
final
 ergsPerSecond ↔ PowerUnits

Ergs per second as a unit.
getter/setter pair
 esuCapacitance → CapacitanceUnits

A synonym for statfarads.
final
 esuOfInductance ↔ InductanceUnits

ESU of inductance as a unit.
getter/setter pair
 esuPotential ↔ ElectricPotentialDifferenceUnits

Synonymous with statvolts.
getter/setter pair
 ET → TimeInstantUnits

Ephemeris Time (ET) is the same as TDT: ET = TDT = TT = TAI + 32.184 s.
Ephemeris Time was renamed Terrestrial Dynamical Time in 1984 (when
Barycentric Dynamical Time was also introduced)
final
 exabytes → InformationUnits

10^18 bytes.
Use Information.exbibytes (EiB) instead for the binary interpretation of EB (2^60 bytes).
final
 exameters → LengthUnits

A unit of 10^18 meters.
final
 exaseconds → TimeUnits

10^18 seconds.
final
 Fahrenheit → TemperatureUnits

Fahrenheit scale units.
final
 faradaysC12 → ChargeUnits

Carbon 12 faradays as a unit.
final
 faradaysChemical → ChargeUnits

Chemical faradays as a unit.
final
 faradaysPhysical → ChargeUnits

Physical faradays as a unit.
final
 farads → CapacitanceUnits

The standard SI unit.
final
 faradsPerMeter ↔ PermittivityUnits

The standard SI unit.
getter/setter pair
 fathoms → LengthUnits

A nonstandard unit of length.
final
 feet → LengthUnits

A nonstandard unit of length.
final
 feetPerHour ↔ SpeedUnits

Feet per hour as a unit.
getter/setter pair
 feetPerMinute ↔ SpeedUnits

Feet per minute as a unit.
getter/setter pair
 feetPerSecond ↔ SpeedUnits

Feet per second as a unit.
getter/setter pair
 feetUsSurvey → LengthUnits

A nonstandard unit of length.
final
 femtometers → LengthUnits

A unit of 10^15 meters.
final
 femtoseconds → TimeUnits

10^15 of a second.
final
 fermis → LengthUnits

A nonstandard unit of length.
final
 fluidOunces ↔ VolumeUnits

Fluid ounces as a unit.
getter/setter pair
 fluidOuncesUK ↔ VolumeUnits

U.K. fluid ounces as a unit.
getter/setter pair
 fluxUnits → SpectralIrradianceUnits

Synonymous with janskys.
final
 footCandles ↔ IlluminanceUnits

Foot candles as a unit.
getter/setter pair
 footPerSecondSquared → AccelerationUnits

A commonly used English unit of acceleration.
final
 footPoundals → EnergyUnits

Footpoundals as a unit.
final
 footPoundsForce → EnergyUnits

Foot pounds force as a unit.
final
 forceDeCheval ↔ PowerUnits

Force de cheval as a unit.
getter/setter pair
 ftWater39 ↔ PressureUnits

Feet of water at 39.2 degrees Fahrenheit.
getter/setter pair
 furlongs → LengthUnits

A nonstandard unit of length.
final
 g → MassUnits

Gram unit synonym.
final
 galileos → AccelerationUnits

Defined as 0.01 meter per second squared.
final
 gallonsUKLiquid ↔ VolumeUnits

U.K. liquid gallons as a unit.
getter/setter pair
 gallonsUSDry ↔ VolumeUnits

U.S. dry gallons as a unit.
getter/setter pair
 gallonsUSLiquid ↔ VolumeUnits

U.S. liquid gallons as a unit.
getter/setter pair
 gals → AccelerationUnits

Synonymous with galileos.
final
 gammas → MassUnits

Microgram units.
final
 gauss ↔ MagneticFluxDensityUnits

One gauss is one tenthousandth of a tesla.
getter/setter pair
 gees → AccelerationUnits

A unit based on the acceleration experienced by a freefalling body at the Earth's surface.
final
 gigabytes → InformationUnits

10^9 bytes.
Use Information.gibibytes (GiB) instead for the binary interpretation of GB (2^30 bytes).
final
 gigameters → LengthUnits

A unit of one billion meters.
final
 gigaseconds → TimeUnits

A billion seconds.
final
 gilberts → CurrentUnits

Gilberts as a unit.
final
 gillsUK ↔ VolumeUnits

U.K. gills as a unit.
getter/setter pair
 gillsUS ↔ VolumeUnits

U.S. gills as a unit.
getter/setter pair
 gons → AngleUnits

Synonym for grads.
final
 googol ↔ Scalar

googol (10^100), arbitrary precision.
getter/setter pair
 googols → ScalarUnits

One googol (10^100) as a unit.
final
 GPST → TimeInstantUnits

GPS Satellite Time (GPST): GPST = TAI  19 s
final
 grades → AngleUnits

Synonym for grads.
final
 grads → AngleUnits

One grad is 0.9 of a degree, exactly.
final
 grains → MassUnits

Grains as a unit.
final
 grams → MassUnits

A unit of one gram.
final
 gramsPerCubicCentimeter ↔ MassDensityUnits

Grams per cubic centimeter as a unit.
getter/setter pair
 greatGross → ScalarUnits

A great gross is 1728.
final
 gross → ScalarUnits

A gross is 144.
final
 halfDozen → ScalarUnits

A halfdozen is 6.
final
 hands → LengthUnits

A nonstandard unit of length.
final
 hBarUnits → AngularMomentumUnits

The Planck constant divided by 2 PI (a.k.a., 'hbar') as units.
final
 hectares → AreaUnits

Accepted for use with the SI, subject to further review.
Equals 1 square hectometer, or 10 000 square meters.
final
 hectometers → LengthUnits

A unit of one hundred meters.
final
 hectoseconds → TimeUnits

A hundred seconds.
final
 hemispheres → SolidAngleUnits

Hemispheres as a unit.
final
 henries ↔ InductanceUnits

The standard SI unit.
getter/setter pair
 henriesPerMeter ↔ PermeabilityUnits

The standard SI unit.
getter/setter pair
 hogsheads ↔ VolumeUnits

Hogsheads as a unit.
getter/setter pair
 horsepower550 ↔ PowerUnits

Horsepower (550 ft lbs/s) as a unit.
getter/setter pair
 horsepowerBoiler ↔ PowerUnits

Horsepower (boiler) as a unit.
getter/setter pair
 horsepowerElectric ↔ PowerUnits

Horsepower (electric) as a unit.
getter/setter pair
 horsepowerMetric ↔ PowerUnits

Horsepower (metric) as a unit.
getter/setter pair
 horsepowerWater ↔ PowerUnits

Horsepower (water) as a unit.
getter/setter pair
 hours → TimeUnits

Accepted for use with the SI.
final
 hoursMeanSolar → TimeUnits

Accepted for use with the SI.
final
 hoursSidereal → TimeUnits

A unit of one hour in the sidereal day.
final
 hoursTime → AngleUnits

Based on Earth's rotation (approximately 15 degrees).
final
 hundred → ScalarUnits

100 as a unit.
final
 hundredths → ScalarUnits

One hundredth as a unit.
final
 hundredweightLong → MassUnits

Long hundredweight as a unit.
final
 hundredweightShort → MassUnits

Short hundredweight as a unit.
final
 inches → LengthUnits

A nonstandard unit of length.
final
 inchesPerSecond ↔ SpeedUnits

Inches per second as a unit.
getter/setter pair
 inchPerSecondSquared → AccelerationUnits

A commonly used English unit of acceleration.
final
 inMercury32 ↔ PressureUnits

Inches of mercury at 32 degrees Fahrenheit.
getter/setter pair
 inWater39 ↔ PressureUnits

Inches of water at 39.2 degrees Fahrenheit.
getter/setter pair
 J2000 → TimeInstant

J2000.0 as defined by the IAU: Julian date: 2000 Jan 1d 12h UT in the TDT time scale
final
 janskys → SpectralIrradianceUnits

A nonSI unit of spectral irradiance used especially in radio astronomy.
final
 JD_TAI → TimeInstantUnits

Julian Date in the TAI scale
final
 JD_TCB → TimeInstantUnits

Julian Date in the TCB scale
final
 JD_TCG → TimeInstantUnits

Julian Date in the TCG scale
final
 JD_TDB → TimeInstantUnits

Julian Date in the TDB (TB) scale
final
 JD_TDT → TimeInstantUnits

Julian Date in the TDT (TT) scale
final
 JD_UT1 → TimeInstantUnits

Julian Date in the UT1 scale
final
 JD_UTC → TimeInstantUnits

Julian Date in the UTC scale
final
 joules → EnergyUnits

The standard SI unit.
final
 jouleSecond → AngularMomentumUnits

The standard SI unit.
final
 joulesPerKelvin → EntropyUnits

The standard SI unit.
final
 joulesPerKilogram ↔ SpecificEnergyUnits

The standard SI unit.
getter/setter pair
 kelvins → TemperatureUnits

The standard SI unit.
final
 kg → MassUnits

Kilogram unit synonym.
final
 kgfSecondSquaredMeter → MassUnits

Kilogram force second square meter as a unit.
final
 kilobytes → InformationUnits

1000 bytes (8000 bits).
Use Information.kibibytes (kiB) instead for the binary interpretation of kB (1024 bytes).
final
 kilocaloriesThermo → EnergyUnits

A synonym for thermochemical kilogram calories.
final
 kilograms → MassUnits

The standard SI unit.
final
 kilogramsForce ↔ ForceUnits

Kilograms force as a unit.
getter/setter pair
 kilogramsPerCubicMeter ↔ MassDensityUnits

The standard SI unit.
getter/setter pair
 kilojoules → EnergyUnits

Kilojoules as a unit.
final
 kilometers → LengthUnits

A unit of one thousand meters.
final
 kilometersPerHour ↔ SpeedUnits

Kilometers per hour as a unit.
getter/setter pair
 kilomoles → AmountOfSubstanceUnits

A unit of one thousand moles.
final
 kiloponds ↔ ForceUnits

A synonym for kilograms force.
getter/setter pair
 kiloseconds → TimeUnits

A thousand seconds.
final
 kilowattHours → EnergyUnits

Kilowatthours as a unit.
final
 kilowatts ↔ PowerUnits

Shorthand kilowatts as a unit.
getter/setter pair
 kips ↔ ForceUnits

Kips as a unit.
getter/setter pair
 knots ↔ SpeedUnits

Knots, tersely.
getter/setter pair
 langleys → EnergyFluxUnits

Langleys as a unit.
final
 leaguesNautical → LengthUnits

A nonstandard unit of length.
final
 leaguesStatute → LengthUnits

A nonstandard unit of length.
final
 leaguesUkNautical → LengthUnits

A nonstandard unit of length.
final
 lightYears → LengthUnits

The distance light travels in one year.
final
 linksEngineer → LengthUnits

A nonstandard unit of length.
final
 linksSurveyor → LengthUnits

A nonstandard unit of length.
final
 liters ↔ VolumeUnits

A terse alternative to
Volume.liters
.getter/setter pair  litersPerSecond ↔ VolumeFlowRateUnits

0.001 cubic meter per second.
getter/setter pair
 lusecs ↔ VolumeFlowRateUnits

Shorthand synonym for liters per second.
getter/setter pair
 lux ↔ IlluminanceUnits

The standard SI unit.
getter/setter pair
 magFieldAtomicUnit ↔ MagneticFluxDensityUnits

Magnetic field atomic unit.
getter/setter pair
 magneticGammas ↔ MagneticFluxDensityUnits

A synonym for nanoteslas.
getter/setter pair
 maxwells ↔ MagneticFluxUnits

A maxwell is one onehundredmillionth of a weber.
getter/setter pair
 megabytes → InformationUnits

10^6 bytes.
Use Information.mebibytes (MiB) instead for the binary interpretation of MB (2^20 bytes).
final
 megameters → LengthUnits

A unit of one million meters.
final
 megaseconds → TimeUnits

A million seconds.
final
 meterPerSecondSquared → AccelerationUnits

A synonym for the standard SIMKS unit of acceleration.
final
 meters → LengthUnits

The standard SI unit.
final
 metersPerSecond ↔ SpeedUnits

The standard SI unit.
getter/setter pair
 metersSquaredPerSecond ↔ KinematicViscosityUnits

The standard SI unit.
getter/setter pair
 metricTons → MassUnits

Accepted for use with the SI.
final
 mg → MassUnits

Milligram unit synonym.
final
 mho → ConductanceUnits

Synonymous with Siemens.
final
 micrometers → LengthUnits

A unit of one millionth of a meter.
final
 microns → LengthUnits

A synonym for micrometers.
final
 microseconds → TimeUnits

A millionth of a second.
final
 miles → LengthUnits

A nonstandard unit of length.
final
 milesPerHour ↔ SpeedUnits

Miles per hour as a unit.
getter/setter pair
 milesPerMinute ↔ SpeedUnits

Miles per minute as a unit.
getter/setter pair
 milesPerSecond ↔ SpeedUnits

Miles per second as a unit.
getter/setter pair
 millibars ↔ PressureUnits

A millibar as a unit.
getter/setter pair
 milligrams → MassUnits

A unit of one thousandth of a gram.
final
 millimeters → LengthUnits

A unit of one thousandth of a meter.
final
 million → ScalarUnits

One million as a unit.
final
 millionths → ScalarUnits

One millionth as a unit.
final
 milliradian → AngleUnits

A unit of one thousandth of a radian.
final
 milliseconds → TimeUnits

A thousandth of a second.
final
 millisteradians → SolidAngleUnits

Millisteradians as a unit.
final
 mils → LengthUnits

A nonstandard unit of length.
final
 minersInches ↔ VolumeFlowRateUnits

The miner's inch as a unit.
getter/setter pair
 minutes → TimeUnits

Accepted for use with the SI.
final
 minutesArc → AngleUnits

A terse version of Angle.minutesArc.
final
 minutesMeanSolar → TimeUnits

Accepted for use with the SI.
final
 minutesSidereal → TimeUnits

A unit of one minute in the sidereal day.
final
 minutesTime → AngleUnits

Based on Earth's rotation.
final
 MJD_TAI → TimeInstantUnits

Modified Julian Date in the TAI scale
final
 MJD_TCB → TimeInstantUnits

Modified Julian Date in the TCB scale
final
 MJD_TCG → TimeInstantUnits

Modified Julian Date in the TCG scale
final
 MJD_TDB → TimeInstantUnits

Modified Julian Date in the TDB scale
final
 MJD_TDT → TimeInstantUnits

Modified Julian Date in the TDT scale
final
 MJD_UT1 → TimeInstantUnits

Modified Julian Date in the UT1 scale
final
 MJD_UTC → TimeInstantUnits

Modified Julian Date in the UTC scale
final
 moles → AmountOfSubstanceUnits

A synonym for the SIMKS base unit of amount of substance.
final
 musecs ↔ VolumeFlowRateUnits

Shorthand synonym for standard SI unit.
getter/setter pair
 myriad → ScalarUnits

A myriad is ten thousand.
final
 nanometers → LengthUnits

A unit of one billionth of a meter.
final
 nanoseconds → TimeUnits

A billionth of a second.
final
 nauticalMilesUk → LengthUnits

A nonstandard unit of length.
final
 newtons → ForceUnits

The standard SI unit.
final
 newtonsPerAmpereSquared ↔ PermeabilityUnits

Newtons per ampere as a unit.
getter/setter pair
 newtonsPerSquareMeter ↔ PressureUnits

A synonym for pascals.
getter/setter pair
 nonillionEur → ScalarUnits

The European variant of one nonillion (10^54) as a unit.
final
 nonillionUS → ScalarUnits

One nonillion (US: 10^30) as a unit.
final
 NTP → TimeInstantUnits

Network Time Protocol (NTP)  NTP is offset from the UTC time scale, with its epoch at 1 Jan 1900 0h
final
 octants → SolidAngleUnits

One eighth (1/8) of a sphere (a spherical right triangle).
final
 octillionEur → ScalarUnits

The European variant of one octillion (10^48) as a unit.
final
 octillionUS → ScalarUnits

One octillion (US: 10^27) as a unit.
final
 ohms ↔ ResistanceUnits

The standard SI unit.
getter/setter pair
 one → ScalarUnits

The standard SI unit.
final
 ouncesApothecary → MassUnits

Apothecary ounces as a unit.
final
 ouncesAvoirdupois → MassUnits

Avoirdupois ounces as a unit.
final
 ouncesForceAvoirdupois ↔ ForceUnits

Avoirdupois ounces force as a unit.
getter/setter pair
 paces → LengthUnits

A nonstandard unit of length.
final
 pair → ScalarUnits

A pair is 2.
final
 parsecs → LengthUnits

A nonstandard unit of length.
final
 pascals ↔ PressureUnits

The standard SI unit.
getter/setter pair
 pecks ↔ VolumeUnits

Pecks as a unit.
getter/setter pair
 pennyweightTroy → MassUnits

Troy pennyweight as a unit.
final
 percent → ScalarUnits

Synonymous with Scalar.percent.
final
 perches → LengthUnits

A nonstandard unit of length.
final
 petabytes → InformationUnits

10^15 bytes.
Use Information.pebibytes (PiB) instead for the binary interpretation of PB (2^50 bytes).
final
 petameters → LengthUnits

A unit of 10^15 meters.
final
 petaseconds → TimeUnits

10^15 seconds.
final
 phots ↔ IlluminanceUnits

Phots as a unit.
getter/setter pair
 picas → LengthUnits

A nonstandard unit of length.
final
 picometers → LengthUnits

A unit of 10^12 meters.
final
 picoseconds → TimeUnits

10^12 of a second.
final
 pintsDry ↔ VolumeUnits

U.S. dry pints as a unit.
getter/setter pair
 pintsLiquid ↔ VolumeUnits

U.S. liquid pints as a unit.
getter/setter pair
 planckUnits → AngularMomentumUnits

The Planck constant as units.
final
 points → LengthUnits

A nonstandard unit of length.
final
 poles → LengthUnits

A nonstandard unit of length.
final
 poundals ↔ ForceUnits

Poundals as a unit.
getter/setter pair
 poundsApothecary → MassUnits

Apothecary pounds as a unit.
final
 poundsAvoirdupois → MassUnits

Avoirdupois pounds as a unit.
final
 poundsForceAvoirdupois ↔ ForceUnits

Avoirdupois pounds force as a unit.
getter/setter pair
 poundsPerCubicFoot ↔ MassDensityUnits

Pounds per cubic foot as a unit.
getter/setter pair
 poundsPerCubicInch ↔ MassDensityUnits

Pounds per cubic inch as a unit.
getter/setter pair
 psi ↔ PressureUnits

Pounds per square inch as a unit.
getter/setter pair
 quadrants → AngleUnits

Represents a quarter circle of ninety degrees.
final
 quadrillionEur → ScalarUnits

The European variant of one quadrillion (10^24) as a unit.
final
 quadrillionUS → ScalarUnits

One quadrillion (US: 10^15) as a unit.
final
 quartsDry ↔ VolumeUnits

U.S. dry quarts as a unit.
getter/setter pair
 quartsLiquid ↔ VolumeUnits

U.S. liquid quarts as a unit.
getter/setter pair
 quintals → MassUnits

A quintal is 100 kilograms.
final
 quintillionEur → ScalarUnits

The European variant of one quintillion (10^30) as a unit.
final
 quintillionUS → ScalarUnits

One quintillion (US: 10^18) as a unit.
final
 rad → AngleUnits

Synonymous with radians.
final
 radians → AngleUnits

A terse version of Angle.radians.
final
 radiansPerSecond → AngularSpeedUnits

The standard SI unit.
final
 Rankine → TemperatureUnits

Rankine scale units.
final
 referenceSound ↔ PowerUnits

A power commonly used as the reference power for calculation of sound power levels.
getter/setter pair
 referenceSoundAir ↔ PressureUnits

A pressure often used as the reference pressure for calculation of
sound pressure levels.
getter/setter pair
 referenceSoundWater ↔ PressureUnits

A pressure commonly used as the reference pressure for calculation of
sound pressure levels.
getter/setter pair
 registryTons ↔ VolumeUnits

Registry tons as a unit.
getter/setter pair
 revolutions → AngleUnits

Represents a full circle of two pi radians.
final
 revolutionsPerMinute → AngularSpeedUnits

Rotation frequency.
final
 rods → LengthUnits

A nonstandard unit of length.
final
 rpm → AngularSpeedUnits

A synonym for revolutionsPerMinute.
final
 score → ScalarUnits

A score is 20. Four score is 80. More poetic than just saying eighty.
final
 scruples → MassUnits

Scruples as a unit.
final
 seconds → TimeUnits

The standard SI unit.
final
 secondsArc → AngleUnits

A terse version of Angle.secondsArc.
final
 secondsSidereal → TimeUnits

A unit of one second in the sidereal day.
final
 secondsTime → AngleUnits

Based on Earth's rotation.
final
 sections → AreaUnits

Synonymous with squareMiles.
final
 semicircles → AngleUnits

Represents a half circle of one hundred eighty degrees (pi radians).
final
 septillionEur → ScalarUnits

The European variant of one billion (10^42) as a unit.
final
 septillionUS → ScalarUnits

One septillion (US: 10^24) as a unit.
final
 sextillionEur → ScalarUnits

The European variant of one sextillion (10^36) as a unit.
final
 sextillionUS → ScalarUnits

One sextillion (US: 10^21) as a unit.
final
 signs → AngleUnits

A sign unit is a little more than half a radian.
final
 sin45 → double

The sine of a forty five degree angle.
final
 sin60 → double

The sine of a sixty degree angle.
final
 skeins → LengthUnits

A nonstandard unit of length.
final
 slugs → MassUnits

Slugs as a unit.
final
 slugsPerCubicFoot ↔ MassDensityUnits

Slugs per cubic foot as a unit.
getter/setter pair
 spans → LengthUnits

A nonstandard unit of length.
final
 spats → SolidAngleUnits

Spats as a unit.
final
 speedOfLightSquared ↔ SpecificEnergyUnits

The square of the speed of light in a vacuum.
getter/setter pair
 speedOfLightUnits ↔ SpeedUnits

The speed of light as a unit.
getter/setter pair
 spheres → SolidAngleUnits

Spheres as a unit.
final
 sphericalRightTriangles → SolidAngleUnits

Same as octants.
final
 squareArcMinutes → SolidAngleUnits

Square arc minutes as a unit.
final
 squareArcSeconds → SolidAngleUnits

Square arc seconds as a unit.
final
 squareCentimeters → AreaUnits

An area unit equivalent to a square with sides having a length of one centimeter.
final
 squareDegrees → SolidAngleUnits

Square degrees as a unit.
final
 squareFeet → AreaUnits

An area unit equivalent to a square with sides having a length of one foot.
final
 squareFeetPerSecond ↔ KinematicViscosityUnits

Square feet per second as a unit.
getter/setter pair
 squareInches → AreaUnits

An area unit equivalent to a square with sides having a length of one inch.
final
 squareKilometers → AreaUnits

An area unit equivalent to a square with sides having a length of one kilometer.
final
 squareMeters → AreaUnits

The standard SI unit.
final
 squareMetersPerSquareSecond ↔ SpecificEnergyUnits

Square meters per second as a unit.
getter/setter pair
 squareMiles → AreaUnits

An area unit equivalent to a square with sides having a length of one mile.
final
 squarePerches → AreaUnits

Synonymous with squareRods.
final
 squarePoles → AreaUnits

Synonymous with squareRods.
final
 squareRods → AreaUnits

An area unit equivalent to a square with sides having a length of one rod.
final
 squareYards → AreaUnits

An area unit equivalent to a square with sides having a length of one yard.
final
 standardAccelerationOfGravity → AccelerationUnits

The more formal name for gees.
final
 statamperes → CurrentUnits

Statamperes as a unit.
final
 statcoulombs → ChargeUnits

Statcoulombs as a unit.
final
 statfarads → CapacitanceUnits

The statfarad is the standard unit of capacitance in the cgs (centimeter/gram/second) system.
final
 statmhos → ConductanceUnits

A nonSI unit of electrical conductance.
final
 statvolts ↔ ElectricPotentialDifferenceUnits

A useful unit for electromagnetism because, in a vacuum, an electric field of one statvolt/cm has
the same energy density as a magnetic field of one gauss. Likewise, a plane wave propagating in a
vacuum has perpendicular electric and magnetic fields such that for every gauss of magnetic field
intensity there is one statvolt/cm of electric field intensity.
getter/setter pair
 steradians → SolidAngleUnits

The standard SI unit.
final
 steres ↔ VolumeUnits

A synonym for cubic meters.
getter/setter pair
 stokes ↔ KinematicViscosityUnits

Stokes as a unit.
getter/setter pair
 system → TimeInstantUnits

Measures time since 1 Jan 1970 0h 0m 0s, which is the System
time defined by many computer operating systems
final
 tablespoons ↔ VolumeUnits

Tablespoons as a unit.
getter/setter pair
 TAI → TimeInstantUnits

International Atomic Time scale units
final
 tan30 → double

The tangent of a thirty degree angle.
final
 tan60 → double

The tangent of a sixty degree angle.
final
 TB → TimeInstantUnits

Barycentric Time (TB); same as TDB: TT = TDB
final
 TCB → TimeInstantUnits

Barycentric Coordinate Time (TCB): TCB = TDB + (1.550505e8)(JD  2443144.5)(86400)
final
 TCG → TimeInstantUnits

Geocentric Coordinate Time (TCG): TCG = TDT + (6.969291e10)(JD  2443144.5)(86400)
final
 TDB → TimeInstantUnits

Barycentric Dynamical Time (TDB): TDB varies from TDT by periodic variations
final
 TDT → TimeInstantUnits

Terrestrial Dynamical Time (TDT): TDT = TAI + 32.184 s
final
 teaspoons ↔ VolumeUnits

Teaspoons as a unit.
getter/setter pair
 tenths → ScalarUnits

One tenth as a unit.
final
 terabytes → InformationUnits

10^12 bytes.
Use Information.tebibytes (TiB) instead for the binary interpretation of TB (2^40 bytes).
final
 terameters → LengthUnits

A unit of 10^12 meters.
final
 teraseconds → TimeUnits

10^12 seconds.
final
 teslas ↔ MagneticFluxDensityUnits

The standard SI unit.
getter/setter pair
 thermalCoulomb → EntropyUnits

Entropy as a 'charge'; identical to joulesPerKelvin.
final
 therms → EnergyUnits

Therms as a unit.
final
 thousand → ScalarUnits

1000 as a unit.
final
 thousandths → ScalarUnits

One thousandth as a unit.
final
 tonnes → MassUnits

Accepted for use with the SI.
final
 tons → EnergyUnits

Tons of TNT equivalent as a unit.
final
 tonsAssay → MassUnits

Assay tons as a unit.
final
 tonsLong → MassUnits

Long tons as a unit.
final
 tonsShort → MassUnits

Short tons as a unit.
final
 torrs ↔ PressureUnits

Torrs as a unit.
getter/setter pair
 townships → AreaUnits

An area unit used in US surveyors' measures equalling 36 square miles.
final
 trillionEur → ScalarUnits

The European variant of one trillion (10^18) as a unit.
final
 trillionthsUS → ScalarUnits

One trillionth (US: 10^12) as a unit.
final
 trillionUS → ScalarUnits

One trillion (US: 10^12) as a unit.
final
 TT → TimeInstantUnits

Terrestrial Time (TT) is the same as TDT: TDT = TT = TAI + 32.184 s
final
 unifiedAtomicMassUnits → MassUnits

Accepted for use with the SI.
final
 unitPoles ↔ MagneticFluxUnits

Unit poles as a unit.
getter/setter pair
 unitPolesDensity ↔ MagneticFluxDensityUnits

Unit poles density as a unit.
getter/setter pair
 UT1 → TimeInstantUnits

Universal Time (UT1): UT1 = TDT  Delta T
final
 UT2 → TimeInstantUnits

Universal Time (UT2):
UT2 = UT1 + 0.022 sin(2PIt)  0.012 cos(2PIt)  0.006 sin(4PIt) + 0.007 cos(4PIt),
where t = the date in Besellian years
final
 UTC → TimeInstantUnits

Coordinated Universal Time (differs from TAI by a number of leap seconds)
final
 volts ↔ ElectricPotentialDifferenceUnits

The standard SI unit.
getter/setter pair
 wattHour → EnergyUnits

Watthour as a unit.
final
 watts ↔ PowerUnits

The standard SI unit.
getter/setter pair
 wattSecond → EnergyUnits

Wattsecond as a unit.
final
 wattsPerSquareMeter → EnergyFluxUnits

The standard SI unit.
final
 webers ↔ MagneticFluxUnits

The standard SI unit.
getter/setter pair
 xUnits → LengthUnits

A nonstandard unit of length.
final
 yards → LengthUnits

A nonstandard unit of length.
final
 yearsCalendar → TimeUnits

Calendar years as a unit.
final
 yearsJulian → TimeUnits

Defined as exactly 365.25 days of 86400 SI seconds each.
The length of the Julian year is the average length of the year in the Julian calendar that was used in Western
societies until some centuries ago, and from which the unit is named.
final
 yearsSidereal → TimeUnits

Sidereal years as a unit.
final
 yearsTropical → TimeUnits

Tropical years as a unit.
final
 yoctometers → LengthUnits

A unit of 10^24 meters.
final
 yoctoseconds → TimeUnits

10^24 of a second.
final
 yottameters → LengthUnits

A unit of 10^24 meters.
final
 yottaseconds → TimeUnits

10^24 seconds.
final
 zeptometers → LengthUnits

A unit of 10^21 meters.
final
 zeptoseconds → TimeUnits

10^21 of a second.
final
 zettameters → LengthUnits

A unit of 10^21 meters.
final
 zettaseconds → TimeUnits

10^21 seconds.
final
Functions

angleFromHourMinSec(
int hour, int minute, double second, [double uncert = 0]) → Angle  Constructs an angle from hours, minutes and seconds of time (as opposed to arc).

cosecant(
Angle a) → double  The ratio of the hypotenuse to the side opposite an acute angle; the reciprocal of sine.

cotangent(
Angle a) → double  The ratio of the side (other than the hypotenuse) adjacent to a particular acute angle to the side opposite the angle.

degToRad(
num deg) → double  Converts degrees to radians.

radToDeg(
num rad) → double  Convert radians to degrees.

secant(
Angle a) → double  The ratio of the hypotenuse to the shorter side adjacent to an acute angle; the reciprocal of a cosine.

toMutable(
Quantity q) → MutableQuantity 
Create a MutableQuantity with the same value, dimensions and uncertainty as
q
.