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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  
54.5 J =
  Symbol Unit Name
1.25007×1019  Eh  a.u. of energy 
8.90523×10-9  bboe  barrel oil equivalent 
8.90523×10-9  bboe  bboe (barrel oil equivalent) 
3.40162×1011  BeV  BeV (billion eV) 
5.16558×10-2  Btu (ISO)  British thermal unit (ISO) 
5.1656×10-2  Btu (IT)  British thermal unit (IT) 
5.16162×10-2  Btu (mean)  British thermal unit (mean) 
5.16906×10-2  Btu (therm.)  British thermal unit (thermochemical) 
13.0227  cal15  calorie (15°C) 
12.9623  cal4  calorie (4°C) 
1.30383×10-2  Cal, kcal  Calorie (diet kilocalorie) 
13.0173  cal (IT)  calorie (IT) (International Steam Table) 
13.0071  calmean  calorie (mean) 
13.0258  cal (therm.)  calorie (thermochemical) 
2.86966×10-2  Chu  Celsius-heat unit 
54.5  C-V  coulomb volt 
537.873  cm3-atm  cubic centimeter-atm 
1.89948×10-2  ft3-atm  cubic foot atm 
3.40162×1020  eV  electronvolt 
5.45×108  erg  erg 
40.1971  ft-lbf  foot-pound force 
1293.3  ft-pdl  foot-poundal 
3.40162×1011  GeV  gigaelectronvolt 
13.0173  gram-cal  gram calorie 
1.25007×1019  Eh  hartree 
2.03016×10-5  Hp-h  horsepower (550ft-lbf/s)-hour 
482.366  in-lbf  inch pound force 
1.30211×10-2  kcal15  kilocalorie (15°C) 
1.29623×10-2  kcal4  kilocalorie (4°C) 
3.40162×1017  keV  kiloelectronvolt 
5.45×10-2  kJ  kilojoule 
1.30383×10-11  kt (TNT)  kiloton TNT equivalent 
1.51389×10-5  kWh  kilowatt-hour 
3.40162×1014  MeV  megaelectronvolt 
5.45×10-5  MJ  megajoule 
1.30383×10-14  Mt (TNT)  megaton TNT equivalent 
54.5  N-m  newton meter 
5.16588×10-20    Q unit 
5.1656×10-17  quad  quad 
5.1656×10-17  quad  quadrillion 
2.50014×1019  Ry  rydberg 
1.8607×10-9  tce  tce (tonne coal equivalent) 
5.1656×10-7    therm (EEG) 
5.16684×10-7    therm (US) 
1.30211×10-5  th15 °C  thermie (15°C) 
1.30165×10-9  toe  toe (tonne oil equivalent) 
1.30383×10-8  ton (TNT)  ton TNT equivalent 
1.8607×10-9  tce  tonne coal equivalent 
1.30165×10-9  toe  tonne oil equivalent 
1.51389×10-2  Wh  watt hour 
Moment, Torque
  Symbol Unit Name
5.45×108  dyn-cm  dyne-centimeter 
5.55745×105  gf-cm  gram force-centimeter 
5.55745  kgf-m  kilogram force-meter 
5450  N-cm  newton-centimeter 
54.5  N-m  newton-meter 
7717.85  ozf-in  ounce force-inch 
40.1971  lbf-ft  pound force-foot 
482.366  lbf-in  pound force-inch 
1293.3  pdl-ft  poundal-foot