Convert Kilojoules to Joules
Convert kilojoules to joules (kJ to J) instantly. Free, accurate kilojoules to joules calculator with conversion formula and chart.
1 kJ = 1000 J
Conversion formula
1 kilojoule = 1,000 joules
Multiply a value in kilojoules by 1,000 to get joules; divide by the same number to convert back.
Kilojoules to Joules conversion table
| Kilojoules (kJ) | Joules (J) |
|---|---|
| 1 kJ | 1,000 J |
| 2 kJ | 2,000 J |
| 5 kJ | 5,000 J |
| 10 kJ | 10,000 J |
| 25 kJ | 25,000 J |
| 50 kJ | 50,000 J |
| 100 kJ | 100,000 J |
| 500 kJ | 500,000 J |
| 1,000 kJ | 1,000,000 J |
- For example, 12 kilojoules is 12,000 joules.
- A value of 75 kilojoules converts to 75,000 joules.
- Going the other way, 1 joule is 0.001 kilojoules.
More energy conversions
About Kilojoules to Joules
Easily convert kilojoules (kJ) to joules (J) with this free, instant calculator. Enter a value in kilojoules to see the equivalent in joules right away — accurate and calculated in your browser.
How to use Kilojoules to Joules
- 1
Enter the number of kilojoules you want to convert.
- 2
The equivalent value in joules appears instantly.
- 3
Switch units anytime to convert in either direction.
How to convert Kilojoules to Joules
Enter any value in kilojoules (kJ) and this calculator instantly shows the equivalent in joules (J) using the exact internationally agreed conversion factor — no rounding tricks, no ads in the way, and it works offline once the page is loaded.
Use the swap button to convert in the other direction (joules to kilojoules), or switch to any other energy unit from the dropdown — the same page handles joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, btu, electronvolts.
Frequently Asked Questions
How do you convert kilojoules to joules?
Enter your value in kilojoules and the converter instantly shows the result in joules using the exact conversion factor.
Is the kilojoules to joules converter free?
Yes — it's completely free, instant and requires no sign-up.
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