How to convert kilojoules to joules
Formula: J = kJ × 1,000
Worked example: 2,000 kJ → 2,000 × 1,000 = 2,000,000 J
Kilojoules to joules conversion chart
| Kilojoules (kJ) | Joules (J) |
|---|---|
| 100 kJ | 100,000 J |
| 250 kJ | 250,000 J |
| 500 kJ | 500,000 J |
| 750 kJ | 750,000 J |
| 1,000 kJ | 1,000,000 J |
| 1,500 kJ | 1,500,000 J |
| 2,000 kJ | 2,000,000 J |
| 4,000 kJ | 4,000,000 J |
| 6,000 kJ | 6,000,000 J |
| 8,400 kJ | 8,400,000 J |
| 10,000 kJ | 10,000,000 J |
What is a kilojoule?
The kilojoule equals 1,000 joules. Food labels in Europe, Australia and New Zealand list energy in kJ next to kcal; a typical adult reference intake is 8,400 kJ, or 2,000 kcal, per day.
What is a joule?
The joule is the SI unit of energy: the work done by a force of one newton over one meter, or one watt for one second. It is small; lifting an apple about one meter takes roughly one joule.