kilojoule kJ

1000 J. Food labels in some countries.

Quick convert — kilojoule to popular units

Live converter, three directions. Type any value to update all three.

kilojoule
joule
1 kJ = 1,000J
kilojoule
calorie
1 kJ = 239.0057cal
kilojoule
kilocalorie
1 kJ = 0.239kcal

Conversion table — kilojoule to every Energy unit

All values for 1 kJ (forward) and 1 reverse unit → {symbol}.

To / From 1 kJ = 1 to-unit =
joule (J) 1,000 J 0.001 kJ
calorie (cal) 239.00573614 cal 0.004184 kJ
kilocalorie (kcal) 0.23900574 kcal 4.184 kJ
watt-hour (Wh) 0.27777778 Wh 3.6 kJ
kilowatt-hour (kWh) 0.00027778 kWh 3,600 kJ
British thermal unit (BTU) 0.94781712 BTU 1.05505585 kJ
electronvolt (eV) 6.241509e+21 eV 1.602177e-22 kJ
foot-pound (ft·lb) 737.56214928 ft·lb 0.00135582 kJ
therm (thm) 9.478171e-6 thm 105,505.585262 kJ

Frequently Asked Questions

What does kJ stand for?

kilojoule (kJ) is a unit of Energy.

How many kJ are in 1 J?

1 J = 1,000 kJ, so 1 kJ = 0.001 J.

Is this the SI base unit?

No. kilojoule is one of several units in the Energy category. The SI base is J.

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