Convert Joule to Kilojoule
1 joule = 0.001 kilojoules (J to kJ).
Need to move between joules and kilojoules? A joule is smaller than a kilojoule — it takes 1,000 of them to make a single kilojoule. One kilojoule works out to 1,000 joules in the other direction. The converter above does this in real time, and the reference chart lists the values that come up most often.
1 J = 0.001 kJ
How to convert Joules to Kilojoules
Multiply the joule value by 0.001 to get kilojoules.
Example: 10 joules = 0.01 kilojoules.
Joule to Kilojoule Conversion Chart
| Joules | Kilojoules |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 3 J | 0.003 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 20 J | 0.02 kJ |
| 25 J | 0.025 kJ |
| 50 J | 0.05 kJ |
| 100 J | 0.1 kJ |
| 1000 J | 1 kJ |
Frequently Asked Questions
- How many kilojoules are in a joule?
- There are 0.001 kilojoules in 1 joule.
- How do you convert joules to kilojoules?
- Multiply the joule value by 0.001 to get kilojoules.
- What is 5 joules in kilojoules?
- 5 joules equals 0.005 kilojoules.
- What is 100 joules in kilojoules?
- 100 joules equals 0.1 kilojoules.
- What is 1 kilojoule in joules?
- 1 kilojoule equals 1,000 joules.
- Is this joule to kilojoule converter free?
- Yes. The converter is free, needs no sign-up, and runs entirely in your browser — the values you enter never leave your device.