EngineeringUnits
EngineeringUnits is a .NET units-of-measure library built for engineering equations: you can write formulas naturally, keep units attached to values, and get upfront errors when you mess up dimensional analysis.
- No more having your units in doubles with comments above it explaining what type of unit it is.
- No more magic "* 1000" constants floating around in your equations.
- No more rechecking "Did I have all my values converted correctly?"
- No more side notes checking if the units of an equation match
The only place you care about unit types are at the edge of your code.
//Value enters from outside your code
double Inputfield = 21;
//Transfers into an EngineeringUnits unit
Temperature TIn = Temperature.FromDegreesCelsius(Inputfield); //21 degC
//Math
Temperature TOut = TIn - 10.Kelvin; //11 degC
//Converts to DegreeFahrenheit
Temperature USCustomer = TOut.ToUnit(TemperatureUnit.DegreeFahrenheit); //51.8 degF
//Display it
string Output2 = USCustomer.ToString("S2"); // Output: 52 degF
double Inputfield = 21;
//Transfers into an EngineeringUnits unit
Temperature TIn = Temperature.FromDegreesCelsius(Inputfield); //21 degC
//Math
Temperature TOut = TIn - 10.Kelvin; //11 degC
//Converts to DegreeFahrenheit
Temperature USCustomer = TOut.ToUnit(TemperatureUnit.DegreeFahrenheit); //51.8 degF
//Display it
string Output2 = USCustomer.ToString("S2"); // Output: 52 degF
Why EngineeringUnits?
- You can do arithmetic between any unit and keep the result unit-safe.
- Unit-safe math: multiply/divide/add/subtract quantities and let us handle the resulting unit.
- Compile time unit validation: Your equations are checked for correct units while you write it.
- High precision conversions
- Aliases: multiple names can represent the same dimension (e.g., SpecificEnergy vs Enthalpy).
- helpers: Min/Max/Average/mean, Clamp, abs and built-in physical constants.
Install as nuget package
dotnet add package EngineeringUnits
Quick start
If you already use UnitsNet, switching is usually just changing the using:
// UnitsNet:
// using UnitsNet;
// using UnitsNet.Units;
using EngineeringUnits;
using EngineeringUnits.Units;
// using UnitsNet;
// using UnitsNet.Units;
using EngineeringUnits;
using EngineeringUnits.Units;
Unit-safe engineering math
SpecificEntropy p1 = 1.JoulePerKilogramKelvin;
MassFlow m1 = 1.KilogramPerSecond;
Temperature t2 = 10.DegreeCelsius;
Temperature t1 = 5.DegreeCelsius;
Power q = m1 * p1 * (t2 - t1); // 5 W
MassFlow m1 = 1.KilogramPerSecond;
Temperature t2 = 10.DegreeCelsius;
Temperature t1 = 5.DegreeCelsius;
Power q = m1 * p1 * (t2 - t1); // 5 W
Conversion (round-trip safe)
Length oneMeter = 1.Meter;
Length inFoot = oneMeter.ToUnit(LengthUnit.Foot);
Length backToMeter = inFoot.ToUnit(LengthUnit.Meter);
bool roundTripOk = oneMeter == backToMeter; // true
Length inFoot = oneMeter.ToUnit(LengthUnit.Foot);
Length backToMeter = inFoot.ToUnit(LengthUnit.Meter);
bool roundTripOk = oneMeter == backToMeter; // true
Catch unit mistakes early
Mass mass = 10.Kilogram;
Volume volume = 4.CubicMeter;
Density d1 = mass / volume; // OK: kg/m3
// Compile-time error
Density d2 = volume / mass; // shows a red line. Wouldn't let you run the code before it is fixed!
Volume volume = 4.CubicMeter;
Density d1 = mass / volume; // OK: kg/m3
// Compile-time error
Density d2 = volume / mass; // shows a red line. Wouldn't let you run the code before it is fixed!
Very large collection of units
Expand to see list of Units included
Acceleration:[m/s2], [km/s2], [m/s2], [dm/s2], [cm/s2], [um/s2], [mm/s2], [nm/s2], [in/s2], [ft/s2], [kn/s], [kn/min], [kn/h], [g], [mg],
AreaDensity:[kg/m2], [kg/m2],
AreaMomentOfInertia:[m4], [m4], [cm4], [dm4], [mm4], [in4], [ft4],
Area:[ac], [ha], [cm2], [dm2], [km2], [m2], [um2], [m2], [mm2], [nm2], [in2], [ft2], [yd2], [mi2], [nmi2], [ch2],
AreaCost:[$/m2], [$/m2], [M$/m2], [?/m2],
BitRate:[], [B/s], [bit/s], [Kibit/s], [Mibit/s], [Gibit/s], [Tibit/s], [Pibit/s], [Eibit/s], [KiB/s], [MiB/s], [GiB/s], [TiB/s], [PiB/s], [EiB/s], [kB/s], [MB/s], [GB/s], [TB/s], [PB/s], [EB/s], [kbit/s], [Mbit/s], [Gbit/s], [Tbit/s], [Pbit/s], [Ebit/s],
BrakeSpecificFuelConsumption:[kg/J], [kg/J], [g/kWh], [lb/hph],
Capacitance:[F], [F], [kF], [MF], [uF], [mF], [nF], [pF],
CoefficientOfThermalExpansion:[/K], [K?1], [/degF], [/degC],
Density:[kg/m3], [cg/dl], [cg/l], [cg/ml], [dg/dl], [dg/l], [dg/ml], [dg/ul], [g/cm3], [g/m3], [g/mm3], [g/dl], [g/l], [g/ml], [g/ul], [kg/cm3], [kg/m3], [kg/mm3], [kg/l], [kip/ft3], [kip/in3], [ug/m3], [ug/dl], [ug/l], [ug/ml], [ug/ul], [mg/m3], [mg/dl], [mg/l], [mg/ml], [mg/ul], [ng/dl], [ng/l], [ng/ml], [ng/ul], [pg/dl], [pg/l], [pg/ml], [pg/ul], [lb/ft3], [lb/in3], [ppg (imp.)], [ppg (U.S.)], [slug/ft3], [t/cm3], [t/m3], [t/mm3],
DynamicViscosity:[Pa*s], [Pa*s], [uPa*s], [mPa*s], [lb/ft*s], [P], [cP], [N*s/m2], [lbf*s/ft2], [lbf*s/in2], [reyn],
ElectricChargeDensity:[C/m3], [C/m3],
ElectricCharge:[C], [C], [A-h], [kA-h], [MA-h], [mA-h],
ElectricConductivity:[S/m], [S/m], [S/in], [S/ft],
ElectricCurrentDensity:[A/m2], [A/m2], [A/in2], [A/ft2],
ElectricCurrentGradient:[A/s], [A/s], [A/us], [A/ms], [A/ns],
ElectricField:[V/m], [V/m],
ElectricInductance:[H], [H], [uH], [mH], [nH],
ElectricPotentialChangeRate:[V/s], [V/s], [V/min], [V/us], [V/h], [mV/s], [mV/min], [mV/us], [mV/h], [uV/s], [uV/min], [uV/us], [uV/h], [MV/s], [MV/min], [MV/us], [MV/h], [kV/s], [kV/min], [kV/us], [kV/h],
ElectricPotential:[V], [V], [kV], [MV], [GV], [uV], [mV],
MolarMass:[kg/mol], [kg/mol], [cg/mol], [dag/mol], [dg/mol], [g/mol], [hg/mol], [kip/mol], [Mlb/mol], [ug/mol], [mg/mol], [ng/mol], [lb/mol],
ElectricResistance:[O], [O], [GO], [kO], [MO], [uO], [mO],
ElectricResistivity:[O*m], [O*m], [O*cm], [kO*cm], [MO*cm], [uO*cm], [mO*cm], [nO*cm], [pO*cm], [kO*m], [MO*m], [uO*m], [mO*m], [nO*m], [pO*m],
ElectricSurfaceChargeDensity:[C/m2], [C/m2], [C/cm2], [C/in2],
Energy:[J], [mJ], [J], [kJ], [MJ], [GJ], [TJ], [BTU], [kBTU], [MBTU], [GBTU], [eV], [keV], [MeV], [GeV], [TeV], [cal], [kcal], [Mcal], [Wday], [kWday], [MWday], [GWday], [TWday], [Wh], [kWh], [MWh], [GWh], [TWh], [ft*lb], [Dth (E.C.)], [Dth (imp.)], [Dth (U.S.)], [th (E.C.)], [th (imp.)], [th (U.S.)], [erg], [hp*h],
EnergyCost:[$/J], [$/J], [$/kJ], [$/MJ], [$/GJ], [$/kWh], [$/MWh], [M$/J], [M$/kJ], [M$/MJ], [M$/GJ], [M$/kWh], [M$/MWh],
Entropy:[J/K], [J/K], [cal/K], [J/K], [kcal/K], [kJ/K], [kJ/K], [MJ/K],
ForceChangeRate:[N/s], [N/s], [N/min], [lbf/s], [lbf/min], [klbf/s], [klbf/min], [nN/s], [mN/s], [uN/s], [cN/s], [daN/s], [dN/s], [kN/s], [daN/min], [kN/min],
ForcePerLength:[N/m], [N/m], [N/cm], [N/mm], [kgf/cm], [kgf/m], [kgf/mm], [kN/cm], [kN/m], [kN/mm], [kipf/ft], [kipf/in], [MN/cm], [MN/m], [MN/mm], [uN/cm], [uN/m], [uN/mm], [mN/cm], [mN/m], [mN/mm], [lbf/ft], [lbf/in], [lbf/yd], [tf/cm], [tf/m], [tf/mm], [nN/cm], [nN/m], [nN/mm], [cN/cm], [cN/m], [cN/mm], [daN/cm], [daN/m], [daN/mm], [dN/cm], [dN/m], [dN/mm],
Force:[N], [N], [uN], [mN], [daN], [kN], [MN], [dyn], [tf], [tf (short)], [lbf], [kgf], [ozf], [kp], [kipf], [Mlbf], [pdl],
Frequency:[Hz], [Hz], [kHz], [MHz], [GHz], [THz], [s?1], [bpm], [RPM], [RPM], [cph], [cpm], [rad/s],
FuelEfficiency:[m/m3], [km/l], [mpg (imp.)], [mpg (U.S.)],
HeatFlux:[W/m2], [W/m2], [W/in2], [W/ft2], [BTU/h*ft2], [BTU/min*ft2], [BTU/s*ft2], [BTU/s*in2], [cal/s*cm2], [kcal/h*m2], [kcal/s*cm2], [kW/m2], [uW/m2], [mW/m2], [nW/m2], [cW/m2], [dW/m2], [lbf/(ft*s)], [lb/s3],
HeatTransferCoefficient:[W/m2K], [W/m2K], [W/m2degC], [Btu/ft2hrdegF],
Illuminance:[lx], [lx], [klx], [Mlx], [mlx],
Information:[], [B], [b], [Kib], [Mib], [Gib], [Tib], [Pib], [Eib], [KiB], [MiB], [GiB], [TiB], [PiB], [EiB], [kB], [MB], [GB], [TB], [PB], [EB], [kb], [Mb], [Gb], [Tb], [Pb], [Eb],
Irradiance:[W/m2], [W/m2], [W/cm2], [kW/cm2], [MW/cm2], [uW/cm2], [mW/cm2], [nW/cm2], [pW/cm2], [kW/m2], [MW/m2], [uW/m2], [mW/m2], [nW/m2], [pW/m2],
Irradiation:[J/m2], [J/m2], [J/cm2], [J/mm2], [kJ/m2], [kWh/m2], [mJ/cm2], [Wh/m2],
KinematicViscosity:[m2/s], [m2/s], [St], [cSt], [dSt], [kSt], [uSt], [mSt], [nSt],
LapseRate:[K/m], [?degC/km],
LengthCost:[$/m], [$/m], [?/m],
LinearDensity:[kg/m], [kg/m], [g/cm], [g/m], [g/mm], [kg/cm], [kg/mm], [ug/cm], [ug/m], [ug/mm], [mg/cm], [mg/m], [mg/mm], [lb/ft], [lb/in],
LinearPowerDensity:[W/m], [W/m], [W/mm], [W/in], [W/ft], [W/cm], [mW/mm], [mW/m], [mW/in], [mW/ft], [mW/cm], [MW/mm], [MW/m], [MW/in], [MW/ft], [MW/cm], [kW/mm], [kW/m], [kW/in], [kW/ft], [kW/cm], [GW/mm], [GW/m], [GW/in], [GW/ft], [GW/cm],
LuminousFlux:[Empty], [lm],
MagneticField:[T], [T], [G], [mG], [uT], [mT], [nT],
MagneticFlux:[Wb], [Wb],
Magnetization:[A/m], [A/m],
MassCost:[$/kg], [?/kg], [$/kg], [$/t], [M$/t],
MassFlow:[cg/day], [cg/s], [dag/day], [dag/s], [dg/day], [dg/s], [g/day], [g/h], [g/s], [Mg/day], [ug/s], [ug/day], [mg/s], [mg/day], [ng/s], [ng/day], [hg/day], [hg/s], [kg/s], [kg/s], [kg/min], [kg/h], [kg/day], [lb/s], [lb/min], [lb/h], [lb/day], [Mlb/day], [Mlb/h], [Mlb/min], [Mlb/s], [short tn/h], [t/day], [t/h],
MassFlux:[kg/sm2], [kg/sm2], [g/hcm2], [g/hm2], [g/hmm2], [g/scm2], [g/sm2], [g/smm2], [kg/hcm2], [kg/hm2], [kg/hmm2], [kg/scm2], [kg/smm2],
MassMomentOfInertia:[kgm2], [kgm2], [gcm2], [gdm2], [gm2], [gmm2], [kgcm2], [kgdm2], [kgmm2], [ktcm2], [ktdm2], [ktm2], [ktmm2], [Mtcm2], [Mtdm2], [Mtm2], [Mtmm2], [mgcm2], [mgdm2], [mgm2], [mgmm2], [lbft2], [lbin2], [slugft2], [slugin2], [tcm2], [tdm2], [tm2], [tmm2],
MolarEnergy:[J/mol], [J/mol], [kJ/mol], [MJ/mol],
MolarEntropy:[J/(mol*K)], [J/(mol*K)], [kJ/(mol*K)], [MJ/(mol*K)],
Molarity:[mol/m3], [mol/m3], [mol/l], [nmol/l], [pmol/l], [cmol/l], [dmol/l], [umol/l], [mmol/l],
Permeability:[H/m], [H/m],
Permittivity:[F/m], [F/m],
PowerDensity:[W/m3], [W/m3], [W/l], [W/in3], [W/ft3], [TW/l], [TW/m3], [TW/in3], [TW/ft3], [pW/l], [pW/m3], [pW/in3], [pW/ft3], [nW/l], [nW/m3], [nW/in3], [nW/ft3], [mW/l], [mW/m3], [mW/in3], [mW/ft3], [uW/l], [uW/m3], [uW/in3], [uW/ft3], [MW/l], [MW/m3], [MW/in3], [MW/ft3], [kW/l], [kW/m3], [kW/in3], [kW/ft3], [GW/l], [GW/m3], [GW/in3], [GW/ft3], [dW/l], [dW/m3], [dW/in3], [dW/ft3], [daW/l], [daW/m3], [daW/in3], [daW/ft3],
Power:[W], [fW], [pW], [nW], [uW], [mW], [dW], [W], [daW], [kW], [MW], [GW], [TW], [PW], [mJ/h], [J/h], [kJ/h], [MJ/h], [GJ/h], [BTU/h], [BTU/min], [BTU/s], [kBTU/h], [hp(S)], [hp(E)], [hp(H)], [hp(I)], [hp(M)], [cal/s], [kcal/h], [kcal/s], [L?],
PowerCost:[$/W], [$/kW], [$/W],
Pressure:[Pa], [Pa], [uPa], [mPa], [daPa], [hPa], [kPa], [MPa], [GPa], [atm], [ft of head], [inHg], [inH2O], [m of head], [mmHg], [at], [torr], [bar], [ubar], [mbar], [cbar], [dbar], [kbar], [Mbar], [dyn/cm2], [kgf/cm2], [kgf/m2], [kgf/mm2], [kN/cm2], [kN/m2], [kN/mm2], [MN/m2], [tf/cm2], [tf/m2], [tf/mm2], [N/mm2], [N/cm2], [N/m2], [kipf/ft2], [ksi], [lb/ft2], [psi], [lbm/(in*s2)], [bara], [barg],
PressureChangeRate:[Pa/s], [Pa/s], [Pa/min], [MPa/s], [MPa/min], [ksi/s], [ksi/min], [kPa/s], [kPa/min], [atm/s], [psi/min], [psi/s], [Mpsi/s], [Mpsi/min],
Ratio:[-], [-], [ppb], [ppm], [%], [ppt], [%], [cg/g], [cg/kg], [dag/g], [dag/kg], [dg/g], [dg/kg], [g/g], [g/kg], [hg/g], [hg/kg], [kg/g], [kg/kg], [ug/g], [ug/kg], [mg/g], [mg/kg], [ng/g], [ng/kg], [cl/l], [cl/ml], [dl/l], [dl/ml], [l/l], [l/ml], [ul/l], [ul/ml], [ml/l], [ml/ml], [nl/l], [nl/ml], [pl/l], [pl/ml],
ReactiveEnergy:[vars], [varh], [Mvarh], [kvarh],
ReactivePower:[var], [var], [Mvar], [kvar], [Gvar],
RotationalSpeed:[rad/s], [rad/s], [Hz], [kHz], [MHz], [GHz], [THz], [s?1], [bpm], [cph], [cpm],
SpecificEnergy:[J/kg], [J/kg], [kJ/kg], [MJ/kg], [BTU/lb], [cal/g], [kcal/g], [Wday/kg], [kWday/kg], [MWday/kg], [GWday/kg], [TWday/kg], [Wh/kg], [kWh/kg], [MWh/kg], [GWh/kg], [Wday/t], [kWday/t], [MWday/t], [GWday/t], [TWday/t], [Wday/t (short)], [kWday/t (short)], [MWday/t (short)], [GWday/t (short)], [TWday/t (short)],
SpecificEntropy:[J/kg*K], [J/kg*K], [J/kg*K], [kJ/kg*K], [kJ/kg*K], [MJ/kg*K], [MJ/kg*K], [J/kg*degR], [cal/g*K], [kcal/g*K], [BTU/lb*K], [BTU/lb*degR], [BTU/lb*degR],
SpecificWeight:[N/m3], [N/m3], [kgf/cm3], [kgf/m3], [kgf/mm3], [kN/cm3], [kN/m3], [kN/mm3], [kipf/ft3], [kipf/in3], [MN/m3], [N/cm3], [N/mm3], [lbf/ft3], [lbf/in3], [tf/cm3], [tf/m3], [tf/mm3],
Speed:[cm/h], [cm/min], [cm/s], [dm/min], [dm/s], [ft/h], [ft/min], [ft/s], [in/h], [in/min], [in/s], [km/h], [km/min], [km/s], [kn], [m/h], [m/min], [m/s], [um/min], [um/s], [mph], [mm/h], [mm/min], [mm/s], [nm/min], [nm/s], [ftUS/h], [ftUS/min], [ftUS/s], [yd/h], [yd/min], [yd/s], [km/h], [m/s], [mi/s],
TemperatureChangeRate:[degC/s], [degC/s], [degC/min], [cdegC/s], [dadegC/s], [ddegC/s], [hdegC/s], [kdegC/s], [udegC/s], [mdegC/s], [ndegC/s],
ThermalConductivity:[W/m*K], [W/m*K], [BTU/h*ft*degF],
ThermalResistance:[m2K/W], [m2degC/W], [m2K/kW], [cm2K/W], [cm2HrdegC/kcal], [Hrft2degF/Btu],
TorquePerLength:[N*m/m], [N*m/m], [kgf*cm/m], [kgf*m/m], [kgf*mm/m], [kN*cm/m], [kN*m/m], [kN*mm/m], [kipf*ft/ft], [kipf*in/ft], [MN*cm/m], [MN*m/m], [MN*mm/m], [Mlbf*ft/ft], [Mlbf*in/ft], [N*cm/m], [N*mm/m], [lbf*ft/ft], [lbf*in/ft], [tf*cm/m], [tf*m/m], [tf*mm/m],
Torque:[N*m], [N*m], [kN*m], [MN*m], [N*mm], [kN*mm], [MN*mm], [N*cm], [MN*cm], [pdl*ft], [lbf*ft], [lbf*in], [tf*cm], [tf*m], [tf*mm], [kN*cm], [kgf*cm], [kgf*m], [kgf*mm], [kipf*ft], [Mlbf*ft], [kipf*in], [Mlbf*in],
VolumeFlow:[af/d], [af/h], [af/m], [af/s], [cl/day], [cl/min], [cl/s], [cm3/min], [dm3/min], [ft3/h], [ft3/min], [ft3/s], [m3/day], [m3/h], [m3/min], [m3/s], [m3/s], [mm3/s], [yd3/day], [yd3/h], [yd3/min], [yd3/s], [dl/day], [dl/min], [dl/s], [kl/day], [kl/min], [kl/s], [kgal (U.S.)/min], [l/day], [l/h], [l/min], [l/s], [Ml/day], [ul/day], [ul/min], [ul/s], [ml/day], [ml/min], [ml/s], [MGD], [nl/day], [nl/min], [nl/s], [bbl/day], [bbl/h], [bbl/min], [bbl/s], [gal (U. K.)/d], [gal (imp.)/h], [gal (imp.)/min], [gal (imp.)/s], [gpd], [gal (U.S.)/h], [gal (U.S.)/min], [gal (U.S.)/s], [Mgal (imp.)/s],
VolumePerLength:[m3/m], [m3/m], [yd3/ft], [yd3/ftUS], [l/km], [l/m], [l/mm], [bbl/ft],
Volume:[m3], [m3], [hm3], [km3], [km3], [um3], [mi3], [mm3], [yd3], [in3], [hm3], [ft3], [hft3], [kft3], [Mft3], [dm3], [cm3], [l], [nl], [ul], [ml], [dl], [cl], [hl], [kl], [Ml], [pl], [ac-ft], [bf], [], [bl (imp.)], [tsp], [], [gal (imp.)], [kgal (imp.)], [Mgal (imp.)], [oz (imp.)], [pt (imp.)], [], [bl (U.S.)], [], [oz (U.S.)], [gal (U.S.)], [kgal (U.S.)], [Mgal (U.S.)], [dagal (U.S.)], [dgal (U.S.)], [hgal (U.S.)], [bbl], [], [pt (U.S.)], [qt (U.S.)], [], [],
VolumeCost:[$/m3], [$/m3], [?/m3],
WarpingMomentOfInertia:[m6], [mm6], [in6], [ft6], [dm6], [cm6], [m6],
SpecificThermalResistance:[mK/W], [mK/W], [mK/kW], [cmK/W],
ApparentPower:[kgm2/s3], [VA], [MVA], [kVA], [GVA],
Enthalpy:[J/kg], [J/kg], [kJ/kg], [MJ/kg], [BTU/lb], [cal/g], [kcal/g], [Wday/kg], [kWday/kg], [MWday/kg], [GWday/kg], [TWday/kg], [Wh/kg], [kWh/kg], [MWh/kg], [GWh/kg], [Wday/t], [kWday/t], [MWday/t], [GWday/t], [TWday/t], [Wday/t (short)], [kWday/t (short)], [MWday/t (short)], [GWday/t (short)], [TWday/t (short)],
SpecificHeatCapacity:[J/kg*K], [J/kg*K], [J/kg*K], [kJ/kg*K], [kJ/kg*K], [MJ/kg*K], [MJ/kg*K], [J/kg*degR], [cal/g*K], [kcal/g*K], [BTU/lb*K], [BTU/lb*degR], [BTU/lb*degR],
Angle:[deg], ['], ["], [g], [rad], [crad], [drad], [urad], [mrad], [nrad], [deg], [udeg], [mdeg], [ndeg], [r],
MolarFlow:[mol/s], [mol/s],
SpecificVolume:[m3/kg], [m3/kg],
VolumetricHeatTransferCoefficient:[W/m3K], [W/m3K],
Jerk:[m/s3], [km/s3], [m/s3], [dm/s3], [cm/s3], [um/s3], [mm/s3], [nm/s3],
AmountOfSubstance:[mol], [mol], [cmol], [dmol], [kmol], [Mmol], [umol], [mmol], [nmol], [pmol], [nlbmol], [ulbmol], [mlbmol], [lbmol], [klbmol], [dlbmol], [clbmol],
Duration:[ns], [ms], [us], [s], [min], [h], [day], [wk], [mo], [yr], [s],
ElectricCurrent:[A], [A], [cA], [kA], [MA], [uA], [mA], [nA], [pA],
Length:[km], [hm], [m], [m], [dm], [cm], [mm], [um], [nm], [uin], [twip], [mil], [pt], [pica], [in], [h], [ft], [yd], [fathom], [ch], [shackle], [mi], [NM], [ftUS], [ly], [kly], [Mly], [R?], [au], [pc], [kpc], [Mpc],
LuminousIntensity:[cd], [cd],
Mass:[kg], [kg], [pg], [cg], [dag], [dg], [g], [hg], [ug], [mg], [ng], [t], [kt], [Mt], [em], [oz], [lb], [st], [slug], [cwt], [cwt], [kip], [t (short)], [long tn], [Mlb], [gr],
Temperature:[K], [K], [degC], [degF], [degR],
Cost:[$], [$], [M$], [?], [PS],