Joule conversions

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Energy Conversions: joule conversions - convert joules to:
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The online converter calculator on this page allows you to select the energy measurement unit you want to convert to starting from joules (J). To make a conversion starting from a unit of energy other than joule, simply click on the "Reset" button.

What is joule?


The joule is the derived unit of energy or work in the SI. One joule is equal to 1,000,000 microjoules (μJ), or 1,000 millijoules (mJ), or 0.001 kilojoules (kJ), or 10-6 megajoules (MJ), or 10-9 gigajoules (GJ) or 10-12 terajoules (TJ).

The joule is the energy consumed or work done when a force of one newton acts to move an object through a distance of one meter or the energy required to produce one watt of power for one second (1 J = 1 N⋅m = 1 W⋅s = 1 kg⋅m2/s2). The joule unit is named after the English physicist James Prescott Joule who lived between 1818 and 1889.

Common subdivisions and multiples of the joule using the SI prefixes:

  • 1 millijoule (mJ) = 10-3 joules (J)
  • 1 microjoule (μJ) = 10-6 joules (J)
  • 1 nanojoule (nJ) = 10-9 joules (J)
  • 1 picojoule (pJ) = 10-12 joules (J)
  • ....................................
  • 1 kilojoule (kJ) = 103 joules (J)
  • 1 megajoule (MJ) = 106 joules (J)
  • 1 gigajoule (GJ) = 109 joules (J)
  • 1 terajoule (TJ) = 1012 joules (J)

The SI is an abbreviation for the International System of Units.





Below you can find a comprehensive list with conversions from joules to other (metric, imperial, or customary) energy measurement units.

  • joule to barrel of oil equivalent (J to BOE)
  • joule to British thermal unit (59 F)
  • joule to British thermal unit (IT) (J to BTU)
  • joule to calorie (J to cal)
  • joule to calorie (15 C) (J to cal)
  • joule to calorie (IT) (J to cal)
  • joule to Celsius heat unit (IT) (J to CHU)
  • joule to cubic foot of natural gas
  • joule to electron volt (J to eV)
  • joule to erg (J to erg)
  • joule to foot-pound force (J to ft lbf)
  • joule to foot-poundal (J to ft pdl)
  • joule to gallon-atmosphere (UK) (J to gal atm)
  • joule to gallon-atmosphere (US) (J to gal atm)
  • joule to giga-electron volt (J to GeV)
  • joule to gigacalorie (J to Gcal)
  • joule to gigajoule (J to GJ)
  • joule to gigawatt hour (J to GWh)
  • joule to Hartree (J to Ha)
  • joule to horsepower-hour (J to hph)
  • joule to inch-pound force (J to in lbf)
  • joule to kilo-electron volt (J to keV)
  • joule to kilocalorie (J to kcal)
  • joule to kilojoule (J to kJ)
  • joule to kilowatt hour (J to kWh)
  • joule to liter-atmosphere (J to L atm)
  • joule to mega-electron volt (J to MeV)
  • joule to megacalorie (J to Mcal)
  • joule to megajoule (J to MJ)
  • joule to megawatt hour (J to MWh)
  • joule to microjoule (J to μJ)
  • joule to milli-electron volt (J to meV)
  • joule to millijoule (J to mJ)
  • joule to nanojoule (J to nJ)
  • joule to Newton metre (J to Nm)
  • joule to standard cubic centimeter (J to scc)
  • joule to standard cubic foot (J to scf)
  • joule to standard cubic yard (J to scy)
  • joule to tera-electron volt (J to TeV)
  • joule to terajoule (J to TJ)
  • joule to terawatt hour (J to TWh)
  • joule to ton of coal equivalent (J to TCE)
  • joule to ton of oil equivalent (J to TOE)
  • joule to watt hour (J to Wh)
  • joule to watt second (J to Ws)