Kilojoules to Joules
Convert kilojoules (kJ) to joules (J). Type in either box; the other updates as you go.
How to convert kilojoules to joules
To convert kilojoules to joules, multiply the number of kilojoules by 1,000.
Example
Convert 5 kilojoules to joules:
Kilojoule to joule conversion chart
| Kilojoules (kJ) | Joules (J) |
|---|---|
| 1 kJ | 1,000 J |
| 2 kJ | 2,000 J |
| 3 kJ | 3,000 J |
| 4 kJ | 4,000 J |
| 5 kJ | 5,000 J |
| 6 kJ | 6,000 J |
| 7 kJ | 7,000 J |
| 8 kJ | 8,000 J |
| 9 kJ | 9,000 J |
| 10 kJ | 10,000 J |
| 12 kJ | 12,000 J |
| 15 kJ | 15,000 J |
| 20 kJ | 20,000 J |
| 25 kJ | 25,000 J |
| 30 kJ | 30,000 J |
| 40 kJ | 40,000 J |
| 50 kJ | 50,000 J |
| 60 kJ | 60,000 J |
| 70 kJ | 70,000 J |
| 75 kJ | 75,000 J |
| 80 kJ | 80,000 J |
| 90 kJ | 90,000 J |
| 100 kJ | 100,000 J |
| 150 kJ | 150,000 J |
| 200 kJ | 200,000 J |
| 250 kJ | 250,000 J |
| 500 kJ | 500,000 J |
| 1,000 kJ | 1,000,000 J |
Going the other way? See the joules to kilojoules chart.
About the units
Kilojoule (kJ)
A kilojoule is 1,000 joules. Food labels in Australia and Europe give energy in kJ next to kcal.
Joule (J)
The joule is the SI unit of energy: the work done by a force of one newton over one meter.
Frequently asked questions
How many joules are in a kilojoule?
There are 1,000 joules in a kilojoule.
How many kilojoules are in a joule?
There are 0.001 kilojoules in a joule.
How do you convert kilojoules to joules?
To convert kilojoules to joules, multiply the number of kilojoules by 1,000.
What is 5 kilojoules in joules?
5 kilojoules equals 5,000 joules.
Convert between joules, calories, kilocalories, kilowatt-hours and BTU. Open the energy converter to see a value in every unit at once.