The kilojoule (kJ) is equal to one thousand (103) joules. Nutritional food labels in most countries express energy in kilojoules (kJ). One square metre of the Earth receives about 1.4 kilojoules of solar radiation every second in full daylight.
Standard Units | |
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Joule | {{joule}} |
Gigajoule | {{gigajoule}} |
Megajoule | {{megajoule}} |
Millijoule | {{millijoule}} |
Microjoule | {{microjoule}} |
Nanojoule | {{nanojoule}} |
Attojoule | {{attojoule}} |
Megaelectron-volt | {{megaelectronvolt}} |
Kiloelectron-volt | {{kiloelectronvolt}} |
Electron-volt | {{electronvolt}} |
Erg | {{erg}} |
Other Units | |
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Gigawatt-hour | {{gigawatthour}} |
Megawatt-hour | {{megawatthour}} |
Kilowatt-hour | {{kilowatthour}} |
Kilowatt-second | {{kilowattsec}} |
Watt-hour | {{watthour}} |
Watt-second | {{wattsec}} |
Newton meter | {{newtonmeter}} |
Horsepower hour | {{horsepowerhour}} |
Horsepower (metric) hour | {{horsepowermetrichour}} |
Kilocalorie (IT) | {{kilocalorieit}} |
Kilocalorie (th) | {{kilocalorieth}} |
Calorie (IT) | {{calorieit}} |
Calorie (th) | {{calorieth}} |
Calorie (Nutritional) | {{calorie}} |
Btu (IT) | {{btuit}} |
Btu (th) | {{btuth}} |
Mega Btu (IT) | {{megabtuit}} |
Ton-hour (refrigeration) | {{tonhour}} |
Fuel oil equivalent | {{fueloilequivalent}} |
Gigaton | {{gigaton}} |
Megaton | {{megaton}} |
Kiloton | {{kiloton}} |
Ton | {{ton}} |
Dyne centimeter | {{dyne}} |
Gram-force meter | {{gramforcemeter}} |
Gram-force centimeter | {{gramforcecentimeter}} |
Kilogram-force centimeter | {{kilogramforcecentimeter}} |
Kilogram-force meter | {{kilogramforcemeter}} |
Kilopond meter | {{kilopondmeter}} |
Pound-force foot | {{poundforcefoot}} |
Pound-force inch | {{poundforceinch}} |
Ound-force inch | {{oundforceinch}} |
Foot-pound | {{footpound}} |
Inch-pound | {{inchpound}} |
Inch-ound | {{inchound}} |
Poundal foot | {{poundalfoot}} |
Therm | {{therm}} |
Therm (EC) | {{thermec}} |
Therm (US) | {{thermus}} |
Hartree energy | {{hartree}} |
Rydberg constant | {{rydberg}} |