Joules to Kilojoules Converter
Convert joules to kilojoules instantly. One joule equals 0.001 kilojoules, so you can type any value in J and read the answer in kJ. The page also…
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Convert joules to kilojoules instantly. One joule equals 0.001 kilojoules, so you can type any value in J and read the answer in kJ. The page also shows a conversion table and the exact formula used.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
1 J = 0.001 kJ
With the default inputs (value in joules = 1 J), the results are: kilojoules 0.001 kJ.
Joules to kilojoules conversion table
Reference table based on the example values; it is not your calculation result.
| joules (J) | kilojoules (kJ) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1,000 | 1 |
Frequently asked questions
How many kilojoules are in one joule?
1 joule = 0.001 kilojoules.
What is the formula to convert joules to kilojoules?
Multiply the value in joules by 0.001.
How do I convert kilojoules back to joules?
1 kilojoule = 1,000 joules.
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