SI coherent derived units with special names and symbols
Coherent derived units are products of powers of base units that include no numerical factor other than 1. The base units and coherent derived units of the SI form a coherent set, designated the set of coherent SI units.
To simplify their expression, 22 coherent derived units in the SI have been given special names.
Name  Symbol  Quantity  Expressed in terms of SI base units  Expressed in terms of other SI units  
hertz  Hz  frequency  s^{1}  1/s  
radian  rad  angle  m/m  
steradian  sr  solid angle  m^{2}/m^{2}  
newton  N  force  kg m s^{‑2}  
pascal  Pa  pressure, stress  kg m^{‑1} s^{‑2}  N/m^{2}  
joule  J  energy, work, heat  kg m^{2} s^{‑2}  N m C V W s 

watt  W  power, radiant flux  kg m^{2} s^{‑3}  J/s V A 

coulomb  C  electric charge  s A  F V  
volt  V  electric potential difference, electromotive force 
kg m^{2} s^{‑3} A^{‑1}  W/A J/C 

farad  F  electric capacitance  kg^{‑1} m^{‑2} s^{4} A^{2}  C/V s/Ω 

ohm  Ω  electric resistance, impedance, reactance 
kg m^{2} s^{‑3} A^{‑2}  1/S V/A 

siemens  S  electric conductance  kg^{‑1} m^{‑2} s^{3} A^{2}  1/Ω A/V 

weber  Wb  magnetic flux  kg m^{2} s^{‑2} A^{‑1}  V s J/A 

tesla  T  magnetic flux density, magnetic field strength 
kg s^{‑2} A^{‑1}  Wb/m^{2}  
henry  H  inductance  kg m^{2} s^{‑2} A^{‑2}  Wb/A  
degree Celsius  °C  Celsius temperature  K  
lumen  lm  luminous flux  cd  cd sr  
lux  lx  illuminance  m^{2} cd  lm/m^{2}  
becquerel  Bq  activity referred to a radionuclide 
s^{1}  1/s  
gray  Gy  absorbed dose (of ionising radiation) 
m^{2} s^{2}  J/kg  
sievert  Sv  dose equivalent (of ionising radiation) 
m^{2} s^{‑2}  J/kg  
katal  kat  catalytic activity  s^{1} mol 