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Symbol:  J 
Category:  Energy 
SI Equivalent:  1 J
Dimension ML2T-2 
System:  SI 
Named after the English physicist James Prescott Joule (1818-1889), the joule is the basic unit of work or energy in the SI system. It is equal to the work done by a force of 1 newton with the point of application displaced by 1 meter in the direction of the force.
Convert     J  
123.4 J =
  Symbol Unit Name
2.83044×1019  Eh  a.u. of energy 
2.01634×10-8  bboe  barrel oil equivalent 
2.01634×10-8  bboe  bboe (barrel oil equivalent) 
7.70202×1011  BeV  BeV (billion eV) 
0.11696  Btu (ISO)  British thermal unit (ISO) 
0.116961  Btu (IT)  British thermal unit (IT) 
0.11687  Btu (mean)  British thermal unit (mean) 
0.117039  Btu (therm.)  British thermal unit (thermochemical) 
29.4863  cal15  calorie (15°C) 
29.3495  cal4  calorie (4°C) 
2.95215×10-2  Cal, kcal  Calorie (diet kilocalorie) 
29.474  cal (IT)  calorie (IT) (International Steam Table) 
29.4509  calmean  calorie (mean) 
29.4933  cal (therm.)  calorie (thermochemical) 
6.49754×10-2  Chu  Celsius-heat unit 
123.4  C-V  coulomb volt 
1217.86  cm3-atm  cubic centimeter-atm 
4.30085×10-2  ft3-atm  cubic foot atm 
7.70202×1020  eV  electronvolt 
1.234×109  erg  erg 
91.0152  ft-lbf  foot-pound force 
2928.33  ft-pdl  foot-poundal 
7.70202×1011  GeV  gigaelectronvolt 
29.474  gram-cal  gram calorie 
2.83044×1019  Eh  hartree 
4.59673×10-5  Hp-h  horsepower (550ft-lbf/s)-hour 
1092.18  in-lbf  inch pound force 
2.94827×10-2  kcal15  kilocalorie (15°C) 
2.93495×10-2  kcal4  kilocalorie (4°C) 
7.70202×1017  keV  kiloelectronvolt 
0.1234  kJ  kilojoule 
2.95215×10-11  kt (TNT)  kiloton TNT equivalent 
3.42778×10-5  kWh  kilowatt-hour 
7.70202×1014  MeV  megaelectronvolt 
1.234×10-4  MJ  megajoule 
2.95215×10-14  Mt (TNT)  megaton TNT equivalent 
123.4  N-m  newton meter 
1.16967×10-19    Q unit 
1.16961×10-16  quad  quad 
1.16961×10-16  quad  quadrillion 
5.66088×1019  Ry  rydberg 
4.21304×10-9  tce  tce (tonne coal equivalent) 
1.16961×10-6    therm (EEG) 
1.16989×10-6    therm (US) 
2.94827×10-5  th15 °C  thermie (15°C) 
2.94722×10-9  toe  toe (tonne oil equivalent) 
2.95215×10-8  ton (TNT)  ton TNT equivalent 
4.21304×10-9  tce  tonne coal equivalent 
2.94722×10-9  toe  tonne oil equivalent 
3.42778×10-2  Wh  watt hour 
Moment, Torque
  Symbol Unit Name
1.234×109  dyn-cm  dyne-centimeter 
1.25833×106  gf-cm  gram force-centimeter 
12.5833  kgf-m  kilogram force-meter 
1.234×104  N-cm  newton-centimeter 
123.4  N-m  newton-meter 
1.74749×104  ozf-in  ounce force-inch 
91.0152  lbf-ft  pound force-foot 
1092.18  lbf-in  pound force-inch 
2928.33  pdl-ft  poundal-foot