Convert kilojoule to joule
Here you can quickly calculate how many joule fit in one kilojoule.
Only numbers, with a single decimal separator.
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- scroll: formula · table · questions -
- 1 kJ = 1000 J
- 1 J = 0.001 kJ
Example: kilojoule to joule
- 1 kilojoule = 1000 joule
Kilojoule to joule conversion table
| kilojoule | joule |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 100000 |
Kilojoule to joule formula
To convert kilojoule to joule, multiply by 1000.
1 kJ = 1000 J
Example: 1 kilojoule = 1000 joule
Common energy conversion mistakes
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The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.
Quick kilojoule and joule conversion quiz
Score:
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7.9 joule equals 0.0079 kilojoule.
Correct answer: 7.9 joule = 0.0079 kilojoule.
140 joule equals 0.14 kilojoule.
Correct answer: 140 joule = 0.14 kilojoule.
23 kilojoule equals 2.3e+4 joule.
Correct answer: 23 kilojoule = 2.3e+4 joule.
114 kilojoule equals 2.28e+5 joule.
Correct answer: 114 kilojoule = 1.14e+5 joule.
7.4 kilojoule equals 7.4e+3 joule.
Correct answer: 7.4 kilojoule = 7.4e+3 joule.