Convert Kilojoule to Joule
1 kJ = 1,000 J
About Converting Kilojoule (kJ) to Joule (J)
One kJ equals 1,000 J. This converter allows you to easily convert between Kilojoule and Joule in real time.
Formula
kJ × 1,000 = J
Example: 1 kJ = 1,000 J
What is Kilojoule?
The kilojoule equals 1,000 joules and is used for food energy labeling in Australia, New Zealand, and many other countries. A typical adult requires about 8,400 kJ (2,000 kcal) of food energy per day. In chemistry, enthalpy changes are commonly expressed in kJ per mole, and the heat of vaporization of water is approximately 2,257 kJ per kilogram.
What is Joule?
The joule is the SI unit of energy, named after English physicist James Prescott Joule. One joule equals the work done by a force of one newton moving an object one meter, or the energy used by one watt of power for one second. Food energy labels in many countries show kilojoules alongside calories. In physics, the joule unifies mechanical, thermal, and electrical energy into a single consistent unit.