Joules to Kilojoules conversion table
| Joules | Kilojoules |
|---|---|
| 1 J | 0.001 kJ |
| 2 J | 0.002 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 25 J | 0.025 kJ |
| 50 J | 0.05 kJ |
| 100 J | 0.1 kJ |
How to convert joules to kilojoules
Kilojoules = Joules × 0.001. For example, 2 J = 0.002 kJ. Type a value in either box above: the other one updates instantly, both ways.
What is a joule?
The joule (J) is the SI unit of energy, the work done by a force of one newton over one meter.
What is a kilojoule?
A kilojoule (kJ) is 1,000 joules; food labels outside the US often list energy in kJ.
How do I convert joules to kilojoules?
Use the formula Kilojoules = Joules × 0.001. Type a value in the joules box and the result appears instantly.
How many kilojoules are in 1 joule?
1 J = 0.001 kJ.
Is this converter free and private?
Yes. It is free, needs no sign-up, and the calculation runs in your browser: nothing is sent to a server.
Is a food Calorie the same as a calorie?
No. The Calorie on food labels is a kilocalorie (kcal), 1000 small calories or 4.184 kJ. This page uses the thermochemical calorie, 4.184 J.