Energy and Work Unit Converter

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Units of measurement

BTU, calorie (cal), electronvolt (eV), erg, foot-pound, gigajoule (GJ), joule (J), kilocalorie (kcal), kilojoule (kJ), kilowatt hour (kWh), megajoule (MJ), nutrition calorie (Cal), ton of TNT (tn), watt hour (Wh)

Popular energy unit conversions


Complete list of energy units for conversion

  • joule [J]
  • 1 kilojoule [kJ] = 1000 joule [J]
  • 1 kilowatt-hour [kW*h] = 3600000 joule [J]
  • 1 watt-hour [W*h] = 3600 joule [J]
  • 1 calorie (nutritional) = 4186.8 joule [J]
  • 1 horsepower (metric) hour = 2647795.5 joule [J]
  • 1 Btu (IT) [Btu (IT), Btu] = 1055.05585262 joule [J]
  • 1 Btu (th) [Btu (th)] = 1054.3499999744 joule [J]
  • 1 gigajoule [GJ] = 1000000000 joule [J]
  • 1 megajoule [MJ] = 1000000 joule [J]
  • 1 millijoule [mJ] = 0.001 joule [J]
  • 1 microjoule [µJ] = 1.0E-6 joule [J]
  • 1 nanojoule [nJ] = 1.0E-9 joule [J]
  • 1 attojoule [aJ] = 1.0E-18 joule [J]
  • 1 megaelectron-volt [MeV] = 1.60217733E-13 joule [J]
  • 1 kiloelectron-volt [keV] = 1.60217733E-16 joule [J]
  • 1 electron-volt [eV] = 1.60217733E-19 joule [J]
  • 1 erg = 1.0E-7 joule [J]
  • 1 gigawatt-hour [GW*h] = 3600000000000 joule [J]
  • 1 megawatt-hour [MW*h] = 3600000000 joule [J]
  • 1 kilowatt-second [kW*s] = 1000 joule [J]
  • 1 watt-second [W*s] = 1 joule [J]
  • 1 newton meter [N*m] = 1 joule [J]
  • 1 horsepower hour [hp*h] = 2684519.5368856 joule [J]
  • 1 kilocalorie (IT) [kcal (IT)] = 4186.8 joule [J]
  • 1 kilocalorie (th) [kcal (th)] = 4184 joule [J]
  • 1 calorie (IT) [cal (IT), cal] = 4.1868 joule [J]
  • 1 calorie (th) [cal (th)] = 4.184 joule [J]
  • 1 mega Btu (IT) [MBtu (IT)] = 1055055852.62 joule [J]
  • 1 ton-hour (refrigeration) = 12660670.23144 joule [J]
  • 1 fuel oil equivalent @kiloliter = 40197627984.822 joule [J]
  • 1 fuel oil equivalent @barrel (US) = 6383087908.3509 joule [J]
  • 1 gigaton [Gton] = 4.184E+18 joule [J]
  • 1 megaton [Mton] = 4.184E+15 joule [J]
  • 1 kiloton [kton] = 4184000000000 joule [J]
  • 1 ton (explosives) = 4184000000 joule [J]
  • 1 dyne centimeter [dyn*cm] = 1.0E-7 joule [J]
  • 1 gram-force meter [gf*m] = 0.00980665 joule [J]
  • 1 gram-force centimeter = 9.80665E-5 joule [J]
  • 1 kilogram-force centimeter = 0.0980665 joule [J]
  • 1 kilogram-force meter = 9.8066499997 joule [J]
  • 1 kilopond meter [kp*m] = 9.8066499997 joule [J]
  • 1 pound-force foot [lbf*ft] = 1.3558179483 joule [J]
  • 1 pound-force inch [lbf*in] = 0.112984829 joule [J]
  • 1 ounce-force inch [ozf*in] = 0.0070615518 joule [J]
  • 1 foot-pound [ft*lbf] = 1.3558179483 joule [J]
  • 1 inch-pound [in*lbf] = 0.112984829 joule [J]
  • 1 inch-ounce [in*ozf] = 0.0070615518 joule [J]
  • 1 poundal foot [pdl*ft] = 0.04214011 joule [J]
  • 1 therm = 105505600 joule [J]
  • 1 therm (EC) = 105505600 joule [J]
  • 1 therm (US) = 105480400 joule [J]
  • 1 Hartree energy = 4.3597482E-18 joule [J]
  • 1 Rydberg constant = 2.1798741E-18 joule [J]