Energy convert.conversions
27 conversions energy units supported.
Popular Energy Conversions
All Energy Units
Click any conversion below to open the dedicated calculator with detailed formulas, conversion tables, and common values.
Joule -> KilojouleJoule -> MegajouleJoule -> GigajouleJoule -> MillijouleJoule -> Calorie (th)Joule -> Calorie (IT)Joule -> KilocalorieJoule -> BTU (th)Joule -> BTU (IT)Joule -> ThermJoule -> Watt-HourJoule -> Kilowatt-HourJoule -> Megawatt-HourJoule -> Electron VoltJoule -> Kiloelectron VoltJoule -> Megaelectron VoltJoule -> Gigaelectron VoltJoule -> ErgJoule -> Foot-PoundJoule -> Inch-PoundJoule -> Horsepower-HourJoule -> Ton of TNTJoule -> Kiloton of TNTJoule -> Megaton of TNTJoule -> HartreeJoule -> RydbergKilojoule -> JouleKilojoule -> MegajouleKilojoule -> GigajouleKilojoule -> MillijouleKilojoule -> Calorie (th)Kilojoule -> Calorie (IT)Kilojoule -> KilocalorieKilojoule -> BTU (th)Kilojoule -> BTU (IT)Kilojoule -> ThermKilojoule -> Watt-HourKilojoule -> Kilowatt-HourKilojoule -> Megawatt-HourKilojoule -> Electron VoltKilojoule -> Kiloelectron VoltKilojoule -> Megaelectron VoltKilojoule -> Gigaelectron VoltKilojoule -> ErgKilojoule -> Foot-PoundKilojoule -> Inch-PoundKilojoule -> Horsepower-HourKilojoule -> Ton of TNTKilojoule -> Kiloton of TNTKilojoule -> Megaton of TNTKilojoule -> HartreeKilojoule -> RydbergMegajoule -> JouleMegajoule -> KilojouleMegajoule -> GigajouleMegajoule -> MillijouleMegajoule -> Calorie (th)Megajoule -> Calorie (IT)Megajoule -> KilocalorieMegajoule -> BTU (th)Megajoule -> BTU (IT)Megajoule -> ThermMegajoule -> Watt-HourMegajoule -> Kilowatt-HourMegajoule -> Megawatt-HourMegajoule -> Electron VoltMegajoule -> Kiloelectron VoltMegajoule -> Megaelectron VoltMegajoule -> Gigaelectron VoltMegajoule -> ErgMegajoule -> Foot-PoundMegajoule -> Inch-PoundMegajoule -> Horsepower-HourMegajoule -> Ton of TNTMegajoule -> Kiloton of TNTMegajoule -> Megaton of TNTMegajoule -> HartreeMegajoule -> RydbergGigajoule -> JouleGigajoule -> KilojouleGigajoule -> MegajouleGigajoule -> MillijouleGigajoule -> Calorie (th)Gigajoule -> Calorie (IT)Gigajoule -> KilocalorieGigajoule -> BTU (th)Gigajoule -> BTU (IT)Gigajoule -> ThermGigajoule -> Watt-HourGigajoule -> Kilowatt-HourGigajoule -> Megawatt-HourGigajoule -> Electron VoltGigajoule -> Kiloelectron VoltGigajoule -> Megaelectron VoltGigajoule -> Gigaelectron VoltGigajoule -> ErgGigajoule -> Foot-PoundGigajoule -> Inch-PoundGigajoule -> Horsepower-HourGigajoule -> Ton of TNTGigajoule -> Kiloton of TNTGigajoule -> Megaton of TNTGigajoule -> HartreeGigajoule -> RydbergMillijoule -> JouleMillijoule -> KilojouleMillijoule -> MegajouleMillijoule -> GigajouleMillijoule -> Calorie (th)Millijoule -> Calorie (IT)Millijoule -> KilocalorieMillijoule -> BTU (th)Millijoule -> BTU (IT)Millijoule -> ThermMillijoule -> Watt-HourMillijoule -> Kilowatt-HourMillijoule -> Megawatt-HourMillijoule -> Electron VoltMillijoule -> Kiloelectron VoltMillijoule -> Megaelectron VoltMillijoule -> Gigaelectron VoltMillijoule -> ErgMillijoule -> Foot-PoundMillijoule -> Inch-PoundMillijoule -> Horsepower-HourMillijoule -> Ton of TNTMillijoule -> Kiloton of TNTMillijoule -> Megaton of TNTMillijoule -> HartreeMillijoule -> RydbergCalorie (th) -> JouleCalorie (th) -> KilojouleCalorie (th) -> MegajouleCalorie (th) -> GigajouleCalorie (th) -> MillijouleCalorie (th) -> Calorie (IT)Calorie (th) -> KilocalorieCalorie (th) -> BTU (th)Calorie (th) -> BTU (IT)Calorie (th) -> ThermCalorie (th) -> Watt-HourCalorie (th) -> Kilowatt-HourCalorie (th) -> Megawatt-HourCalorie (th) -> Electron VoltCalorie (th) -> Kiloelectron VoltCalorie (th) -> Megaelectron VoltCalorie (th) -> Gigaelectron VoltCalorie (th) -> ErgCalorie (th) -> Foot-PoundCalorie (th) -> Inch-PoundCalorie (th) -> Horsepower-HourCalorie (th) -> Ton of TNTCalorie (th) -> Kiloton of TNTCalorie (th) -> Megaton of TNTCalorie (th) -> HartreeCalorie (th) -> RydbergCalorie (IT) -> JouleCalorie (IT) -> KilojouleCalorie (IT) -> MegajouleCalorie (IT) -> GigajouleCalorie (IT) -> MillijouleCalorie (IT) -> Calorie (th)Calorie (IT) -> KilocalorieCalorie (IT) -> BTU (th)Calorie (IT) -> BTU (IT)Calorie (IT) -> ThermCalorie (IT) -> Watt-HourCalorie (IT) -> Kilowatt-HourCalorie (IT) -> Megawatt-HourCalorie (IT) -> Electron VoltCalorie (IT) -> Kiloelectron VoltCalorie (IT) -> Megaelectron VoltCalorie (IT) -> Gigaelectron VoltCalorie (IT) -> ErgCalorie (IT) -> Foot-PoundCalorie (IT) -> Inch-PoundCalorie (IT) -> Horsepower-HourCalorie (IT) -> Ton of TNTCalorie (IT) -> Kiloton of TNTCalorie (IT) -> Megaton of TNTCalorie (IT) -> HartreeCalorie (IT) -> RydbergKilocalorie -> JouleKilocalorie -> KilojouleKilocalorie -> MegajouleKilocalorie -> GigajouleKilocalorie -> MillijouleKilocalorie -> Calorie (th)Kilocalorie -> Calorie (IT)Kilocalorie -> BTU (th)Kilocalorie -> BTU (IT)Kilocalorie -> ThermKilocalorie -> Watt-HourKilocalorie -> Kilowatt-HourKilocalorie -> Megawatt-HourKilocalorie -> Electron VoltKilocalorie -> Kiloelectron VoltKilocalorie -> Megaelectron VoltKilocalorie -> Gigaelectron VoltKilocalorie -> ErgKilocalorie -> Foot-PoundKilocalorie -> Inch-PoundKilocalorie -> Horsepower-HourKilocalorie -> Ton of TNTKilocalorie -> Kiloton of TNTKilocalorie -> Megaton of TNTKilocalorie -> HartreeKilocalorie -> RydbergBTU (th) -> JouleBTU (th) -> KilojouleBTU (th) -> MegajouleBTU (th) -> GigajouleBTU (th) -> MillijouleBTU (th) -> Calorie (th)BTU (th) -> Calorie (IT)BTU (th) -> KilocalorieBTU (th) -> BTU (IT)BTU (th) -> ThermBTU (th) -> Watt-HourBTU (th) -> Kilowatt-HourBTU (th) -> Megawatt-HourBTU (th) -> Electron VoltBTU (th) -> Kiloelectron VoltBTU (th) -> Megaelectron VoltBTU (th) -> Gigaelectron VoltBTU (th) -> ErgBTU (th) -> Foot-PoundBTU (th) -> Inch-PoundBTU (th) -> Horsepower-HourBTU (th) -> Ton of TNTBTU (th) -> Kiloton of TNTBTU (th) -> Megaton of TNTBTU (th) -> HartreeBTU (th) -> RydbergBTU (IT) -> JouleBTU (IT) -> KilojouleBTU (IT) -> MegajouleBTU (IT) -> GigajouleBTU (IT) -> MillijouleBTU (IT) -> Calorie (th)BTU (IT) -> Calorie (IT)BTU (IT) -> KilocalorieBTU (IT) -> BTU (th)BTU (IT) -> ThermBTU (IT) -> Watt-HourBTU (IT) -> Kilowatt-HourBTU (IT) -> Megawatt-HourBTU (IT) -> Electron VoltBTU (IT) -> Kiloelectron VoltBTU (IT) -> Megaelectron VoltBTU (IT) -> Gigaelectron VoltBTU (IT) -> ErgBTU (IT) -> Foot-PoundBTU (IT) -> Inch-PoundBTU (IT) -> Horsepower-HourBTU (IT) -> Ton of TNTBTU (IT) -> Kiloton of TNTBTU (IT) -> Megaton of TNTBTU (IT) -> HartreeBTU (IT) -> RydbergTherm -> JouleTherm -> KilojouleTherm -> MegajouleTherm -> GigajouleTherm -> MillijouleTherm -> Calorie (th)Therm -> Calorie (IT)Therm -> KilocalorieTherm -> BTU (th)Therm -> BTU (IT)Therm -> Watt-HourTherm -> Kilowatt-HourTherm -> Megawatt-HourTherm -> Electron VoltTherm -> Kiloelectron VoltTherm -> Megaelectron VoltTherm -> Gigaelectron VoltTherm -> ErgTherm -> Foot-PoundTherm -> Inch-PoundTherm -> Horsepower-HourTherm -> Ton of TNTTherm -> Kiloton of TNTTherm -> Megaton of TNTTherm -> HartreeTherm -> RydbergWatt-Hour -> JouleWatt-Hour -> KilojouleWatt-Hour -> MegajouleWatt-Hour -> GigajouleWatt-Hour -> MillijouleWatt-Hour -> Calorie (th)Watt-Hour -> Calorie (IT)Watt-Hour -> KilocalorieWatt-Hour -> BTU (th)Watt-Hour -> BTU (IT)Watt-Hour -> ThermWatt-Hour -> Kilowatt-HourWatt-Hour -> Megawatt-HourWatt-Hour -> Electron VoltWatt-Hour -> Kiloelectron VoltWatt-Hour -> Megaelectron VoltWatt-Hour -> Gigaelectron VoltWatt-Hour -> ErgWatt-Hour -> Foot-PoundWatt-Hour -> Inch-PoundWatt-Hour -> Horsepower-HourWatt-Hour -> Ton of TNTWatt-Hour -> Kiloton of TNTWatt-Hour -> Megaton of TNTWatt-Hour -> HartreeWatt-Hour -> RydbergKilowatt-Hour -> JouleKilowatt-Hour -> KilojouleKilowatt-Hour -> MegajouleKilowatt-Hour -> GigajouleKilowatt-Hour -> MillijouleKilowatt-Hour -> Calorie (th)Kilowatt-Hour -> Calorie (IT)Kilowatt-Hour -> KilocalorieKilowatt-Hour -> BTU (th)Kilowatt-Hour -> BTU (IT)Kilowatt-Hour -> ThermKilowatt-Hour -> Watt-HourKilowatt-Hour -> Megawatt-HourKilowatt-Hour -> Electron VoltKilowatt-Hour -> Kiloelectron VoltKilowatt-Hour -> Megaelectron VoltKilowatt-Hour -> Gigaelectron VoltKilowatt-Hour -> ErgKilowatt-Hour -> Foot-PoundKilowatt-Hour -> Inch-PoundKilowatt-Hour -> Horsepower-HourKilowatt-Hour -> Ton of TNTKilowatt-Hour -> Kiloton of TNTKilowatt-Hour -> Megaton of TNTKilowatt-Hour -> HartreeKilowatt-Hour -> RydbergMegawatt-Hour -> JouleMegawatt-Hour -> KilojouleMegawatt-Hour -> MegajouleMegawatt-Hour -> GigajouleMegawatt-Hour -> MillijouleMegawatt-Hour -> Calorie (th)Megawatt-Hour -> Calorie (IT)Megawatt-Hour -> KilocalorieMegawatt-Hour -> BTU (th)Megawatt-Hour -> BTU (IT)Megawatt-Hour -> ThermMegawatt-Hour -> Watt-HourMegawatt-Hour -> Kilowatt-HourMegawatt-Hour -> Electron VoltMegawatt-Hour -> Kiloelectron VoltMegawatt-Hour -> Megaelectron VoltMegawatt-Hour -> Gigaelectron VoltMegawatt-Hour -> ErgMegawatt-Hour -> Foot-PoundMegawatt-Hour -> Inch-PoundMegawatt-Hour -> Horsepower-HourMegawatt-Hour -> Ton of TNTMegawatt-Hour -> Kiloton of TNTMegawatt-Hour -> Megaton of TNTMegawatt-Hour -> HartreeMegawatt-Hour -> RydbergElectron Volt -> JouleElectron Volt -> KilojouleElectron Volt -> MegajouleElectron Volt -> GigajouleElectron Volt -> MillijouleElectron Volt -> Calorie (th)Electron Volt -> Calorie (IT)Electron Volt -> KilocalorieElectron Volt -> BTU (th)Electron Volt -> BTU (IT)Electron Volt -> ThermElectron Volt -> Watt-HourElectron Volt -> Kilowatt-HourElectron Volt -> Megawatt-HourElectron Volt -> Kiloelectron VoltElectron Volt -> Megaelectron VoltElectron Volt -> Gigaelectron VoltElectron Volt -> ErgElectron Volt -> Foot-PoundElectron Volt -> Inch-PoundElectron Volt -> Horsepower-HourElectron Volt -> Ton of TNTElectron Volt -> Kiloton of TNTElectron Volt -> Megaton of TNTElectron Volt -> HartreeElectron Volt -> RydbergKiloelectron Volt -> JouleKiloelectron Volt -> KilojouleKiloelectron Volt -> MegajouleKiloelectron Volt -> GigajouleKiloelectron Volt -> MillijouleKiloelectron Volt -> Calorie (th)Kiloelectron Volt -> Calorie (IT)Kiloelectron Volt -> KilocalorieKiloelectron Volt -> BTU (th)Kiloelectron Volt -> BTU (IT)Kiloelectron Volt -> ThermKiloelectron Volt -> Watt-HourKiloelectron Volt -> Kilowatt-HourKiloelectron Volt -> Megawatt-HourKiloelectron Volt -> Electron VoltKiloelectron Volt -> Megaelectron VoltKiloelectron Volt -> Gigaelectron VoltKiloelectron Volt -> ErgKiloelectron Volt -> Foot-PoundKiloelectron Volt -> Inch-PoundKiloelectron Volt -> Horsepower-HourKiloelectron Volt -> Ton of TNTKiloelectron Volt -> Kiloton of TNTKiloelectron Volt -> Megaton of TNTKiloelectron Volt -> HartreeKiloelectron Volt -> RydbergMegaelectron Volt -> JouleMegaelectron Volt -> KilojouleMegaelectron Volt -> MegajouleMegaelectron Volt -> GigajouleMegaelectron Volt -> MillijouleMegaelectron Volt -> Calorie (th)Megaelectron Volt -> Calorie (IT)Megaelectron Volt -> KilocalorieMegaelectron Volt -> BTU (th)Megaelectron Volt -> BTU (IT)Megaelectron Volt -> ThermMegaelectron Volt -> Watt-HourMegaelectron Volt -> Kilowatt-HourMegaelectron Volt -> Megawatt-HourMegaelectron Volt -> Electron VoltMegaelectron Volt -> Kiloelectron VoltMegaelectron Volt -> Gigaelectron VoltMegaelectron Volt -> ErgMegaelectron Volt -> Foot-PoundMegaelectron Volt -> Inch-PoundMegaelectron Volt -> Horsepower-HourMegaelectron Volt -> Ton of TNTMegaelectron Volt -> Kiloton of TNTMegaelectron Volt -> Megaton of TNTMegaelectron Volt -> HartreeMegaelectron Volt -> RydbergGigaelectron Volt -> JouleGigaelectron Volt -> KilojouleGigaelectron Volt -> MegajouleGigaelectron Volt -> GigajouleGigaelectron Volt -> MillijouleGigaelectron Volt -> Calorie (th)Gigaelectron Volt -> Calorie (IT)Gigaelectron Volt -> KilocalorieGigaelectron Volt -> BTU (th)Gigaelectron Volt -> BTU (IT)Gigaelectron Volt -> ThermGigaelectron Volt -> Watt-HourGigaelectron Volt -> Kilowatt-HourGigaelectron Volt -> Megawatt-HourGigaelectron Volt -> Electron VoltGigaelectron Volt -> Kiloelectron VoltGigaelectron Volt -> Megaelectron VoltGigaelectron Volt -> ErgGigaelectron Volt -> Foot-PoundGigaelectron Volt -> Inch-PoundGigaelectron Volt -> Horsepower-HourGigaelectron Volt -> Ton of TNTGigaelectron Volt -> Kiloton of TNTGigaelectron Volt -> Megaton of TNTGigaelectron Volt -> HartreeGigaelectron Volt -> RydbergErg -> JouleErg -> KilojouleErg -> MegajouleErg -> GigajouleErg -> MillijouleErg -> Calorie (th)Erg -> Calorie (IT)Erg -> KilocalorieErg -> BTU (th)Erg -> BTU (IT)Erg -> ThermErg -> Watt-HourErg -> Kilowatt-HourErg -> Megawatt-HourErg -> Electron VoltErg -> Kiloelectron VoltErg -> Megaelectron VoltErg -> Gigaelectron VoltErg -> Foot-PoundErg -> Inch-PoundErg -> Horsepower-HourErg -> Ton of TNTErg -> Kiloton of TNTErg -> Megaton of TNTErg -> HartreeErg -> RydbergFoot-Pound -> JouleFoot-Pound -> KilojouleFoot-Pound -> MegajouleFoot-Pound -> GigajouleFoot-Pound -> MillijouleFoot-Pound -> Calorie (th)Foot-Pound -> Calorie (IT)Foot-Pound -> KilocalorieFoot-Pound -> BTU (th)Foot-Pound -> BTU (IT)Foot-Pound -> ThermFoot-Pound -> Watt-HourFoot-Pound -> Kilowatt-HourFoot-Pound -> Megawatt-HourFoot-Pound -> Electron VoltFoot-Pound -> Kiloelectron VoltFoot-Pound -> Megaelectron VoltFoot-Pound -> Gigaelectron VoltFoot-Pound -> ErgFoot-Pound -> Inch-PoundFoot-Pound -> Horsepower-HourFoot-Pound -> Ton of TNTFoot-Pound -> Kiloton of TNTFoot-Pound -> Megaton of TNTFoot-Pound -> HartreeFoot-Pound -> RydbergInch-Pound -> JouleInch-Pound -> KilojouleInch-Pound -> MegajouleInch-Pound -> GigajouleInch-Pound -> MillijouleInch-Pound -> Calorie (th)Inch-Pound -> Calorie (IT)Inch-Pound -> KilocalorieInch-Pound -> BTU (th)Inch-Pound -> BTU (IT)Inch-Pound -> ThermInch-Pound -> Watt-HourInch-Pound -> Kilowatt-HourInch-Pound -> Megawatt-HourInch-Pound -> Electron VoltInch-Pound -> Kiloelectron VoltInch-Pound -> Megaelectron VoltInch-Pound -> Gigaelectron VoltInch-Pound -> ErgInch-Pound -> Foot-PoundInch-Pound -> Horsepower-HourInch-Pound -> Ton of TNTInch-Pound -> Kiloton of TNTInch-Pound -> Megaton of TNTInch-Pound -> HartreeInch-Pound -> RydbergHorsepower-Hour -> JouleHorsepower-Hour -> KilojouleHorsepower-Hour -> MegajouleHorsepower-Hour -> GigajouleHorsepower-Hour -> MillijouleHorsepower-Hour -> Calorie (th)Horsepower-Hour -> Calorie (IT)Horsepower-Hour -> KilocalorieHorsepower-Hour -> BTU (th)Horsepower-Hour -> BTU (IT)Horsepower-Hour -> ThermHorsepower-Hour -> Watt-HourHorsepower-Hour -> Kilowatt-HourHorsepower-Hour -> Megawatt-HourHorsepower-Hour -> Electron VoltHorsepower-Hour -> Kiloelectron VoltHorsepower-Hour -> Megaelectron VoltHorsepower-Hour -> Gigaelectron VoltHorsepower-Hour -> ErgHorsepower-Hour -> Foot-PoundHorsepower-Hour -> Inch-PoundHorsepower-Hour -> Ton of TNTHorsepower-Hour -> Kiloton of TNTHorsepower-Hour -> Megaton of TNTHorsepower-Hour -> HartreeHorsepower-Hour -> RydbergTon of TNT -> JouleTon of TNT -> KilojouleTon of TNT -> MegajouleTon of TNT -> GigajouleTon of TNT -> MillijouleTon of TNT -> Calorie (th)Ton of TNT -> Calorie (IT)Ton of TNT -> KilocalorieTon of TNT -> BTU (th)Ton of TNT -> BTU (IT)Ton of TNT -> ThermTon of TNT -> Watt-HourTon of TNT -> Kilowatt-HourTon of TNT -> Megawatt-HourTon of TNT -> Electron VoltTon of TNT -> Kiloelectron VoltTon of TNT -> Megaelectron VoltTon of TNT -> Gigaelectron VoltTon of TNT -> ErgTon of TNT -> Foot-PoundTon of TNT -> Inch-PoundTon of TNT -> Horsepower-HourTon of TNT -> Kiloton of TNTTon of TNT -> Megaton of TNTTon of TNT -> HartreeTon of TNT -> RydbergKiloton of TNT -> JouleKiloton of TNT -> KilojouleKiloton of TNT -> MegajouleKiloton of TNT -> GigajouleKiloton of TNT -> MillijouleKiloton of TNT -> Calorie (th)Kiloton of TNT -> Calorie (IT)Kiloton of TNT -> KilocalorieKiloton of TNT -> BTU (th)Kiloton of TNT -> BTU (IT)Kiloton of TNT -> ThermKiloton of TNT -> Watt-HourKiloton of TNT -> Kilowatt-HourKiloton of TNT -> Megawatt-HourKiloton of TNT -> Electron VoltKiloton of TNT -> Kiloelectron VoltKiloton of TNT -> Megaelectron VoltKiloton of TNT -> Gigaelectron VoltKiloton of TNT -> ErgKiloton of TNT -> Foot-PoundKiloton of TNT -> Inch-PoundKiloton of TNT -> Horsepower-HourKiloton of TNT -> Ton of TNTKiloton of TNT -> Megaton of TNTKiloton of TNT -> HartreeKiloton of TNT -> RydbergMegaton of TNT -> JouleMegaton of TNT -> KilojouleMegaton of TNT -> MegajouleMegaton of TNT -> GigajouleMegaton of TNT -> MillijouleMegaton of TNT -> Calorie (th)Megaton of TNT -> Calorie (IT)Megaton of TNT -> KilocalorieMegaton of TNT -> BTU (th)Megaton of TNT -> BTU (IT)Megaton of TNT -> ThermMegaton of TNT -> Watt-HourMegaton of TNT -> Kilowatt-HourMegaton of TNT -> Megawatt-HourMegaton of TNT -> Electron VoltMegaton of TNT -> Kiloelectron VoltMegaton of TNT -> Megaelectron VoltMegaton of TNT -> Gigaelectron VoltMegaton of TNT -> ErgMegaton of TNT -> Foot-PoundMegaton of TNT -> Inch-PoundMegaton of TNT -> Horsepower-HourMegaton of TNT -> Ton of TNTMegaton of TNT -> Kiloton of TNTMegaton of TNT -> HartreeMegaton of TNT -> RydbergHartree -> JouleHartree -> KilojouleHartree -> MegajouleHartree -> GigajouleHartree -> MillijouleHartree -> Calorie (th)Hartree -> Calorie (IT)Hartree -> KilocalorieHartree -> BTU (th)Hartree -> BTU (IT)Hartree -> ThermHartree -> Watt-HourHartree -> Kilowatt-HourHartree -> Megawatt-HourHartree -> Electron VoltHartree -> Kiloelectron VoltHartree -> Megaelectron VoltHartree -> Gigaelectron VoltHartree -> ErgHartree -> Foot-PoundHartree -> Inch-PoundHartree -> Horsepower-HourHartree -> Ton of TNTHartree -> Kiloton of TNTHartree -> Megaton of TNTHartree -> RydbergRydberg -> JouleRydberg -> KilojouleRydberg -> MegajouleRydberg -> GigajouleRydberg -> MillijouleRydberg -> Calorie (th)Rydberg -> Calorie (IT)Rydberg -> KilocalorieRydberg -> BTU (th)Rydberg -> BTU (IT)Rydberg -> ThermRydberg -> Watt-HourRydberg -> Kilowatt-HourRydberg -> Megawatt-HourRydberg -> Electron VoltRydberg -> Kiloelectron VoltRydberg -> Megaelectron VoltRydberg -> Gigaelectron VoltRydberg -> ErgRydberg -> Foot-PoundRydberg -> Inch-PoundRydberg -> Horsepower-HourRydberg -> Ton of TNTRydberg -> Kiloton of TNTRydberg -> Megaton of TNTRydberg -> Hartree
About energy units
This category covers 27 energy units and every ordered conversion between them, which is 702 dedicated pages in total. The units included here are Joule (J), Kilojoule (kJ), Megajoule (MJ), Gigajoule (GJ), Millijoule (mJ), Calorie (th) (cal), Calorie (IT) (cal (IT)), Kilocalorie (kcal), BTU (th) (BTU), BTU (IT) (BTU (IT)), Therm (thm), Watt-Hour (Wh), Kilowatt-Hour (kWh), Megawatt-Hour (MWh), Electron Volt (eV), Kiloelectron Volt (keV), Megaelectron Volt (MeV), Gigaelectron Volt (GeV), Erg (erg), Foot-Pound (ft·lbf), Inch-Pound (in·lbf), Horsepower-Hour (hp·h), Ton of TNT (tTNT), Kiloton of TNT (ktTNT), Megaton of TNT (MtTNT), Hartree (Eh), Rydberg (Ry). Each unit is defined against a single canonical reference for the category, so a conversion between any two of them is carried out as two exact steps: the input value is first expressed in the reference unit, then re-expressed in the target unit. Routing every pair through one reference rather than storing a factor for each combination keeps the whole category internally consistent and means a correction to one definition propagates everywhere it is used.
Precision and rounding
Conversions are computed in double-precision floating point and displayed at the precision you choose, so the value shown is a rounded view of a more exact internal result rather than the result itself. Where a factor is defined exactly by treaty or standard, the arithmetic is exact to the limits of the representation; where a factor derives from a measured physical quantity, the trailing digits carry the uncertainty of the underlying measurement. For engineering and scientific work, carry the full precision through intermediate steps and round only the final figure, since rounding at each stage of a multi-step calculation accumulates error.
How to use this page
Pick any pair above to open its dedicated converter, which shows the formula, the exact factor, a table of common values and the source the definition is taken from. The search box filters the pair list by unit name or symbol, which is the quickest route when a category carries many closely named units. Every conversion is calculated in your browser, so pages continue to work offline once visited and no input value is ever sent to a server.