Kilojoules to Joules
Convert kJ to J. 1 kilojoule = 1,000 J, and 1 joule = 0.001 kJ.
Formula Multiply the value in kilojoules by 1,000. Kilojoules to Joules table
1 kilojoule in every unit
| Joules | 1,000 | J |
|---|---|---|
| Megajoules | 0.001 | MJ |
| Calories | 239.005736138 | cal |
| Kilocalories | 0.239005736138 | kcal |
| Watt-hours | 0.277777777778 | Wh |
| Kilowatt-hours | 0.000277777778 | kWh |
| British thermal units | 0.947817120313 | BTU |
| Foot-pounds | 737.562149277 | ft·lbf |
| Electronvolts | 6.241509e+21 | eV |
Food labels write kilocalories (kcal) as "Calories". Calories here are thermochemical: 1 cal = 4.184 J.
How to convert kilojoules to joules
Multiply the value in kilojoules by 1,000.
For example, 10 kJ = 10,000 J, and 10 J = 0.01 kJ.
Frequently asked questions
How many joules are in one kilojoule?
1 kilojoule = 1,000 J.
What is 10 kJ in J?
10 kJ = 10,000 J.
How do I convert J back to kJ?
Divide the value in joules by 1,000. 1 joule = 0.001 kJ.
Kilojoules to Joules table
| Kilojoules (kJ) | Joules (J) |
|---|---|
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 7 | 7,000 |
| 8 | 8,000 |
| 9 | 9,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 30 | 30,000 |
| 50 | 50,000 |
| 75 | 75,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
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