Convert Kilojoules to Joules
One kilojoule equals 1,000 joules. Type any value to convert kilojoules to joules instantly — with a full reference table below.
Convert Kilojoules to Joules
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Conversion formula
To convert kilojoules to joules, multiply by 1,000. One kilojoule equals 1,000 J, and one joule equals 0.001 kJ.
Kilojoules to Joules table
About converting Kilojoules to Joules
Kilojoules (kJ) and Joules (J) are both units of energy. The exact factor is 1 kJ = 1,000 J, so multiply by 1,000 to go from kilojoules to joules (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Joules to Kilojoules converter, or the full unit converter for every unit at once.
Frequently asked questions
How many joules are in one kilojoule?
One kilojoule equals 1,000 joules.
How do I convert kilojoules to joules?
Multiply the number of kilojoules by 1,000. For example, 10 kilojoules = 10,000 joules.
What is 5 kilojoules in joules?
5 kilojoules is 5,000 joules.