J to Kj ConverterRight in Your Browser
Convert joules (J) to kilojoules (kJ). The joule (J) is the SI energy unit — the work of pushing with one newton for one meter. The kilojoule (kJ) is 1,000 joules — the energy unit on food labels in Australia, New Zealand and much of Europe. Everything is calculated locally in your browser — no server, and it works offline.
0.001 kJ
in kilojoules (kilojoule)
To convert joules to kilojoules, multiply the joule value by 0.001.
Switch to Kj to JJ to Kj Chart
| Joules (J) | Kilojoules (kJ) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
Frequently Asked Questions
How many kilojoules are in a joule?
One joule equals 0.001 kilojoules (1 J = 0.001 kJ). So to go from joules to kilojoules, multiply the joule value by 0.001.
What is the formula to convert joules to kilojoules?
To convert joules to kilojoules, multiply the joule value by 0.001. For example, 10 J is 0.01 kJ.
What is 100 joules in kilojoules?
100 joules — lifting an apple about 100 meters — is 0.1 kilojoules. The converter above works for any value, entirely in your browser.
Is the joule to kilojoule conversion exact?
The factor used here is the defined value: 1 J = 0.001 kJ. Results are rounded to six significant digits for readability, so for high-precision work use the full factor.
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