kilojoules to joules Converter
Convert kilojoules to joules instantly with a reference conversion table.
| kilojoules | joules |
|---|
How to convert kilojoules to joules
Enter your value
Type the number of kilojoules you want to convert into the left box. The result in joules appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — joules to kilojoules. Your current value carries across so you don't have to re-enter anything.
About kilojoules and joules
kilojoules and joules are common energy measurements.
1 kJ = 1,000 J. The joule (J) is the SI base unit of energy. 1 joule is defined as the energy transferred when 1 newton of force acts over 1 metre. James Prescott Joule (1818–1889) established the equivalence of heat and mechanical work — the foundation of thermodynamics.
| kilojoules | joules |
|---|---|
| 0.001 | 1 |
| 0.01 | 10 |
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
Frequently asked questions
How do I convert kilojoules to joules?
To convert kilojoules to joules, multiply by 1000. Or use the calculator above for instant results.
How many joules are in 1 kilojoules?
1 kilojoules equals 1000 joules.
Is the kilojoules to joules converter free?
Yes, the kilojoules to joules converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.