KiloJoules to Joules Converter

Use this converter to easily convert between KiloJoules and Joules (KJ to J).

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  1. How many Joules equal one KiloJoule?
  2. Difference between KiloJoules and Joules
  3. How to convert KiloJoules to Joules
  4. KJ to J conversion table

    How many Joules equal one KiloJoule?

KiloJoules and Joules are units of the international system of units (SI) that measure energy. The standard symbol for Joule is J [1], whereas the symbol for KiloJoule is KJ. Exactly 1,000 J equals equal one KiloJoule.

    Difference between KiloJoules and Joules

Joules and KiloJoules are used when measuring energy, but are of different magnitudes. While the KiloJoule is a derivative of the Joule, the Joule itself is a derivative metric, equal to the energy transferred to (work done on) an object when a force of one newton acts on it in the direction of its motion through a distance of one meter (1 newton meter or N⋅m). An equivalent definition is the energy dissipated as heat by an electric current of one ampere passing through a resistance of one ohm for one second.

The Joule is named after the 19-th century English physicist James Prescott Joule (1818–1889) who had significant contributions to physics, particularly related to the nature of heat, and is credited with the discovery of its relationship to mechanical work. The name of the KiloJoule is composed of the prefix Kilo-, meaning 1,000, and the base unit.

    How to convert KiloJoules to Joules

Conversion from KiloJoules to Joules is done for calculations related to energy requirements in machinery, electrical grids, as well as energy consumption of biological entities. This conversion is quite straightforward – just use the formula:

KJ x 1,000 = J

Naturally, having a calculator would make it easy to compute, but just moving the decimal point 3 positions to the left (adding zeroes as necessary) will lead to the same result.

KJ to Joules conversion example

Sample task: convert 3 KJ to J. Solution:

KJ * 1000 = J
3 KJ * 1,000 = 3,000 J
End result:
3 KJ is equal to 3,000 J

    KJ to J conversion table

KJ to J conversion table
1 KJ 1,000 J
2 KJ 2,000 J
3 KJ 3,000 J
4 KJ 4,000 J
5 KJ 5,000 J
6 KJ 6,000 J
7 KJ 7,000 J
8 KJ 8,000 J
9 KJ 9,000 J
10 KJ 10,000 J
20 KJ 20,000 J
30 KJ 30,000 J
40 KJ 40,000 J
50 KJ 50,000 J
60 KJ 60,000 J
70 KJ 70,000 J
80 KJ 80,000 J
90 KJ 90,000 J
100 KJ 100,000 J
200 KJ 200,000 J
300 KJ 300,000 J
400 KJ 400,000 J
500 KJ 500,000 J
600 KJ 600,000 J
700 KJ 700,000 J
800 KJ 800,000 J
900 KJ 900,000 J
1,000 KJ 1,000,000 J


1 NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

2 International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Kilojoules to Joules Converter", [online] Available at: URL [Accessed Date: 06 Jun, 2023].