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SI Base Units

  QUANTITY NAME SYMBOL  
  Amount of Substance mole mol  
  Electric Current ampere A  
  Length meter m  
  Luminous Intensity candela cd  
  Mass kilogram kg  
  Thermodynamic Temperature kelvin K  
  Time second s  


SI Derived Units

  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Absorbed Dose / Specific Energy Imparted / Kerma / gray Gy J/kg
m2 s-2
  Absorbed Dose Rate gray per second Gy/s M2 s-3
  Acceleration metre per second squared m/s2  
  Activity of a Radionuclide bequerel Bq s-1
  Area square meter m2  
  Capacitance farad F C/V
m-2 kg-1 s4 A2
  Celsius Temperature degree celsius °C K
  Concentration mole per cubic metre mol/m3  
  Current Density ampere per square metre A/m2  
  Density / Mass Density kilogram per cubic metre kg/m3  


  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Dose Equivalent / Dose Equivalent Index sievert Sv J/kg
m2 s-2
  Dynamic Viscosity pascal second Pa s m-1 kg s-1
  Electric Charge / Quantity of Electricity coulomb C s A
  Electric Charge Density coulomb per cubic metre C/m3 m-3 s A
  Electric Conductance siemens S A/V
m-2 kg-1 s3 A2
  Electric Field Strength volt per metre V/m m kg s-3 A-1
  Electric Flux Density coulomb per square metre C/m2 m-2 s A
  Electric Potential / Potential Difference / Electr volt V W/A
m2 kg s-3 A-1
  Electric Resistance ohm Ω V/A
  Energy / Work / Quantity of Heat joule J N m
m2 kg s-2


  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Energy Density joule per cubic metre J/m3 m-1 kg s-2
  Exposure (x and Ω rays) coulomb per kilogram C/kg kg-1 s A
  Force newton N m kg s-2
  Frequency hertz Hz s-1
  Heat Capacity / Entropy joule per kelvin J/K M2 kg s-2 K-1
  Heat Flux Density / Irradiance watt per square metre W/m2 kg s-3
  Illuminance lux lx lm/m2
m-2 cd sr
  Inductance henry H Wb/A
M2 kg s-2 A-2
  Luminance candela per square metre cd/m2  
  Luminous Flux lumen lm cd sr


  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Magnetic Field Strength ampere per metre A/m  
  Magnetic Flux weber Wb V s
m2 kg s-2 A-1
  Magnetic Flux Density tesla T Wb/m2
kg s-2 A-1
  Molar Energy joule per mole J/mol m2 kg s-2 mol-1
  Molar Entropy / Molar Heat Capacity joule per mole kelvin J/(mol K) m2 kg s-2 K-1 mol-1
  Moment of Force newton meter N m M2 kg s-2
  Permeability henry per metre H/m m kg s-2 A-2
  Permittivity farad per metre F/m m-3 kg-1 s4 A2
  Power / Radiant Flux watt W J/s
m2 kg s-3
  Pressure / Stress pascal Pa N/m2
m-1 kg s-2

  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Specific Energy joule per kilogram J/kg M2 s-2
  Specific Heat Capacity / Specific Entropy joule per kilogram kelvin J/(kg K) m2 s-2 K-1
  Specific Volume cubic metre per kilogram m3/kg  
  Speed / Velocity metre per second m/s  
  Surface Tension newton per metre N/m kg s-2
  Thermal Conductivity watt per metre kelvin W/(m K) m kg s-3 K-1
  Volume cubic meter m3  
  Wave Number reciprocal metre m-1



SI Supplementary Units

  QUANTITY NAME SYMBOL EQUIVALENT UNITS
  Angular Acceleration radian per second squared rad/s2  
  Angular Velocity radian per second rad/s  
  Plane Angle radian rad m m-1 = 1
  Radiance watt per square metre steradian W/(m2 sr)  
  Radiant Intensity watt per steradian W/sr  
  Solid Angle steradian sr m2 m-2 = 1

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