Reciprocal System Natural Units versus Conventional Units

Natural Units Conventional Symbol Name Measures Equivalents
st A MKS A ampere electric current
1t Am MKS A/m Ampere per metre magnetization
magnetic field strength
1st Am2 MKS A/m² Ampere per square metre electric current density
st A MKS A.rad ampere radian magnetomotive force
ts4 kgms2 CGS Ba Barye pressure
1t 1s MKS Bq Becquerel radioactivity
1s cd MKS cd candela luminous intensity
1s3 cdm2 MKS cd/m² candela per square metre luminance
s1 m CGS cm centimeter length
s1 sA MKS C Coulomb electric charge or quantity of electricity
1s2 sAm3 MKS C/m³ Coulomb per cubic metre electric charge density
s4t3 sAkg MKS C/kg Coulomb per kilogram exposure
1 sAm MKS C/m Coulomb per metre linear charge density
1s sAm2 MKS C/m² Coulomb per square metre electric displacement field
polarization density
s31 m3 MKS cubic metre volume
s6t3 m3kg MKS m³/kg cubic metre per kilogram specific volume
s31 m3mol MKS m³/mol cubic metre per mole molar volume
s3t m3smol MKS m³/(mol.s) cubic metre per mole second catalytic efficiency
s3t m3s MKS m³/s cubic metre per second volumetric flow
ts K MKS °C degree Celsius temperature
ts2 mkgs2 CGS dyn dyne force
ts m2kgs2 CGS erg erg energy
s3t s4A2m2kg MKS F Farad electrical capacitance
s2t s4A2m3kg MKS F/m Farad per metre permittivity
st2 ms2 CGS Gal Galileo acceleration
t3s3 kg CGS g gram mass
s2t2 m2s2 MKS Gy Gray absorbed dose
s2t3 m2s3 MKS Gy/s Gray per second absorbed dose rate
t3s3 m2kgs2A2 MKS H Henry electrical inductance
t3s4 mkgs2A2 MKS H/m Henry per metre magnetic permeability
1t 1s MKS Hz Hertz frequency
1t2 1s2 MKS Hz/s Hertz per second frequency drift
ts m2kgs2 MKS J Joule energy
ts4 kgms2 MKS J/m³ Joule per cubic metre energy density
1 m2kgs2K MKS J/K Joule per kelvin heat capacity
1 m2kgs2Kmol MKS J/(K.mol) Joule per Kelvin mole molar heat capacity
molar entropy
s2t2 m2s2 MKS J/kg Joule per kilogram specific energy
s9t7 m2kg2K MKS J/( Joule per kilogram Kelvin specific heat capacity
specific entropy
ts m2kgs2mol MKS J/mol Joule per mole molar energy
ts3 kgs2 MKS J/m² Joule per square metre radiant exposure
1s3 kgs3 MKS J/(m².s) Joule per square metre second energy flux density
s3t m2A MKS J/T Joule per Tesla magnetic dipole moment
t2s m2kgs MKS J.s Joule second action
1t mols MKS kat katal catalytic activity
1s 1m CGS K Kayser wave number
ts K MKS K Kelvin thermodynamic pressure
ts2 Km MKS K/m Kelvin per metre temperature gradient
t1 s3Km2kg MKS K/W Kelvin per Watt thermal resistance
t3s3 kg MKS kg kilogram mass
t3s6 kgm3 MKS kg/m³ kilogram per cubic meter density
mass density
t3s4 kgm MKS kg/m kilogram per metre linear mass density
t3s3 kgmol MKS kg/mol kilogram per mole molar mass
t2s3 kgs MKS kg/s kilogram per second mass flow rate
t3s5 kgm2 MKS kg/m² kilogram per square metre area density
t3s m2kg MKS kg.m² kilogram square metre moment of inertia
1s cd MKS lm lumen luminous flux
1 s3cdm2kg MKS lm/W lumen per Watt luminous efficacy
ts scd MKS lm.s lumen second luminous energy
1s3 cdm2 MKS lx lux illuminance
ts3 scdm2 MKS lx.s lux second luminous exposure
s1 m MKS m metre length
1s2 1m2 MKS m/m³ metre per cubic metre fuel efficiency
s4t3 s2A2mkg MKS m/H metre per Henry magnetic susceptibility
st ms MKS m/s metre per second speed
st3 ms3 MKS m/s³ metre per second cubed jerk
st2 ms2 MKS m/s² metre per second squared acceleration
1 mol MKS mol mole amount of substance
1s3 molm3 MKS mol/m³ mole per cubic metre molarity
amount of substance concentration
s3t3 molkg MKS mol/kg mole per kilogram molarity
ts2 mkgs2 MKS N Newton force
ts m2kgs2 MKS N.m Newton metre torque
moment of force
t2s m2kgs MKS N.m.s Newton metre second angular momentum
s2t m2s MKS N.m.s/kg Newton metre second per kilogra specific angular momentum
ts3 kgs2 MKS N/m Newton per metre surface tension
1s2 mkgs3 MKS N/s Newton per second yank
t2s2 mkgs MKS N.s Newton second momentum
t2s3 m2kgs3A2 MKS Ω ohm electrical resistance
t2s2 m3kgs3A2 MKS Ω.m ohm metre resistivity
ts4 kgms2 MKS Pa Pascal pressure
t2s4 kgms MKS Pa.s Pascal second dynamic viscosity
1 1 CGS ph phot illuminance
t2s4 kgms CGS P Poise dynamic viscosity
1 1 MKS rad radian angle
1t 1s MKS rad/s radian per second angular velocity
1t2 1s2 MKS rad/s² radian per second squared angular acceleration
s3t3 s2A2m2kg MKS H⁻¹ reciprocal Henry magnetic reluctance
st 1K MKS K⁻¹ reciprocal Kelvin thermal expansion coefficient
1s 1m MKS m⁻¹ reciprocal metre wavenumber
optical power
spatial frequency
s4t ms2kg MKS Pa⁻¹ reciprocal Pascal compressibility
t1 s MKS s second time
s3t2 s3A2m2kg MKS S Siemens electrical conductance
s2t2 s3A2m3kg MKS S/m Siemens per metre electric conductivity
s5t2 s3A2molkg MKS S.m²/mol Siemens square metre per mole molar conductivity
s2t2 m2s2 MKS Sv Sievert equivalent dose
s21 m2 MKS square metre area
s2t m2s MKS m²/s square metre per second kinematic viscosity
thermal diffusivity
diffusion coefficient
s4t2 s2Akg MKS m²/(V.s) square metre per volt second electron mobility
1 1 MKS sr steradian solid angle
1 1 CGS sb stilb luminance
s2t m2s CGS St Stokes kinematic viscosity
t2s4 kgs2A MKS T Tesla magnetic field strength
magnetic flux density
t2s3 mkgs2A MKS T.m Tesla metre magnetic rigidity
ts2 m2kgs3A MKS V Volt voltage
electrical potential difference
electromotive force
ts3 mkgs3A MKS V/m Volt per metre electric field strength
1s m2kgs3 MKS W Watt power
radiant flux
1s4 kgms3 MKS W/m³ Watt per cubic metre spectral irradiance
power density
1s2 mkgs3 MKS W/m Watt per metre spectral power
1st mkgs3K MKS W/(m.K) Watt per metre Kelvin thermal conductivity
1s3 kgs3 MKS W/m² Watt per square metre heat flux density
1s m2kgs3 MKS W/sr Watt per steradian radiant intensity
1s4 kgms3 MKS W/(sr.m³) Watt per steradian cubic metre spectral radiance
1s2 mkgs3 MKS W/(sr.m) Watt per steradian metre spectral intensity
1s3 kgs3 MKS W/(sr.m²) Watt per steradian square metre radiance
t2s2 m2kgs2A MKS Wb Weber magnetic flux

t2s m3kgs2A MKS Wb.m Weber metre magnetic moment
t2s3 mkgs2A MKS Wb/m Weber per metre magnetic vector potential

The Reciprocal System has JUST TWO units: space (s) and time (t). All conventional units can be expressed in exponents of space-time relationships. Note that "s" in the MKS/CGS system is "seconds," not "space." This table uses MathML to render the Natural Units and Conventional symbols columns. If they are not displaying correctly, then your browser may not support MathML.