Convert Joules to Kilojoules
1 joule = 0.001 kilojoules. Multiply the number of joules by 0.001.
Joules to Kilojoules table
| Joules | Kilojoules |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 3 J | 0.003 kJ |
| 4 J | 0.004 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 |
| 500 J | 0.5 kJ |
| 1000 J | 1 kJ |
About these units
The joule (J) is an SI base or derived unit of energy & work.
The kilojoule (kJ) is a metric unit of energy & work, equal to 1,000 joules.
Going the other way, 1 kilojoule = 1,000 joules. Diet calories, electricity bills in kilowatt-hours, boiler ratings in BTU and particle physics in electronvolts are all the same physical quantity. Convert energy across every scale from the atomic to the industrial.
Frequently asked
- How many kilojoules are in a joule?
- 1 joule = 0.001 kilojoules.
- How do you convert joules to kilojoules?
- Multiply the number of joules by 0.001.
- What is 10 J in kJ?
- 10 J = 0.01 kJ.