Joules to Kilojoules conversion

Joules (J) to kilojoules (kJ), energy conversion calculator and how to convert.

Joules to kilojoules converter

Enter the energy in joules and press the Convert button:

Enter energy in joules:		J
Result in kilojoules:		kJ

Kilojoules to Joules conversion ►

Joules to Kilojoules

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10³. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

How to convert joules to kilojoules

One joule is equal to thousandth of a kilojoule:

1J = 0.001kJ

The energy in kilojoules E_(kJ) is equal to the energy in joules E_(J) divided by 1000:

E_(kJ) = E_(J) / 1000

Example

Convert 500 joules to kilojoules.

The energy E in kilojoules (kJ) is equal to 500 joules (J) divided by 1000:

E_(kJ) = 500J / 1000 = 0.5kJ

KJ to Joules conversion ►