How do you convert joules to kilojoules?

1 joule = 0.001 kilojoules. Multiply your joules value by that factor, or use the energy converter above.

How do you convert joules to kilocalories?

1 joule = 0.000239006 kilocalories. Multiply your joules value by that factor, or use the energy converter above.

1 joule = 0.000000278 kilowatt-hours. Multiply your joules value by that factor, or use the energy converter above.

Convertly normalises every energy conversion through the joule, so results stay consistent whichever pair of units you pick.

Energy conversions between joules, calories, kilowatt-hours, BTU and therms.

Amount

Result0.001

1 joule = 0.001 kilojoules

Unit	Symbol	System	In J
Joule	J	SI	1
Kilojoule	kJ	Metric	1,000
Megajoule	MJ	Metric	1,000,000
Calorie	cal	Metric	4.184
Kilocalorie	kcal	Metric	4,184
Watt-hour	Wh	Metric	3,600
Kilowatt-hour	kWh	Metric	3,600,000
Megawatt-hour	MWh	Metric	3,600,000,000
Electronvolt	eV	Metric	1.602176634 × 10⁻¹⁹
British thermal unit	BTU	US customary	1,055.055853
Therm	thm	Metric	105,505,585.3
Foot-pound	ft·lb	US customary	1.355817948

How do you convert joules to kilojoules?: 1 joule = 0.001 kilojoules. Multiply your joules value by that factor, or use the energy converter above.
How do you convert joules to kilocalories?: 1 joule = 0.000239006 kilocalories. Multiply your joules value by that factor, or use the energy converter above.
How do you convert joules to kilowatt-hours?: 1 joule = 0.000000278 kilowatt-hours. Multiply your joules value by that factor, or use the energy converter above.
What is the base unit for energy?: Convertly normalises every energy conversion through the joule, so results stay consistent whichever pair of units you pick.