Convert Kilojoule (kJ) to Joule (J) instantly. Enter any value and get the result immediately.
kJ → J Converter
| Kilojoule (kJ) | Joule (J) |
|---|---|
| 0.1 kJ | 100 J |
| 0.5 kJ | 500 J |
| 1 kJ | 1000 J |
| 2 kJ | 2000 J |
| 5 kJ | 5000 J |
| 10 kJ | 10,000 J |
| 20 kJ | 20,000 J |
| 50 kJ | 50,000 J |
| 100 kJ | 100,000 J |
| 200 kJ | 200,000 J |
| 500 kJ | 500,000 J |
| 1000 kJ | 1,000,000 J |
| 5000 kJ | 5,000,000 J |
| 10000 kJ | 10,000,000 J |
Formula: Joule = Kilojoule × 1000
Example: 1 kJ = 1000 J
You can also use the interactive converter above. Simply enter any Kilojoule value and the equivalent Joule value will appear instantly. Click the ⇄ button to reverse the conversion.
Beyond the calculator above, it helps to understand what these two units actually represent and where you will run into them in everyday life.
Step-by-step example — Convert 500 kJ to J:
A Kilojoule (kJ) equals 1,000 joules and is used on nutrition labels in many countries outside the US.
A Joule (J) is the SI unit of energy, used as the scientific standard for measuring work and heat.
The formula is: Joule = Kilojoule x 1000. Multiply any Kilojoule value by 1000 to get the equivalent in Joule.
1 kJ = 1000 J.
1 J = 0.001 kJ.
Kilojoule is bigger than Joule. 1 Kilojoule = 1000 J.
1000 kJ = 1,000,000 J.
5000 J = 5 kJ.
Most countries following the metric system label food energy in kilojoules, or kJ alongside kcal, since it's the standard SI-derived energy unit, unlike the US which uses Calories exclusively.