Kilojoules to Joules Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Kilojoules to Joules
Multiply the kilojoules value by 1,000: 1 kJ = 1,000 J. Going the other way, 1 J = 0.001 kJ, so divide by 1,000 or use the Joules to Kilojoules converter.
About these units
Kilojoules (kJ)
A kilojoule is 1,000 joules. Food energy is labelled in kilojoules in many countries; 1 kJ is about 0.239 kilocalories.
Joules (J)
The joule is the SI unit of energy: the work done by a force of one newton over one meter. Lifting a small apple one meter takes about one joule.
Kilojoules to Joules conversion table
| 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 |
| 10 kJ | 10,000 J |
| 20 kJ | 20,000 J |
| 25 kJ | 25,000 J |
| 50 kJ | 50,000 J |
| 100 kJ | 100,000 J |
| 500 kJ | 500,000 J |
| 1,000 kJ | 1e+6 J |
More kilojoules conversions
- Kilojoules to Megajoules1 kJ = 0.001 MJ
- Kilojoules to Gigajoules1 kJ = 1e-6 GJ
- Kilojoules to Millijoules1 kJ = 1e+6 mJ
- Kilojoules to Microjoules1 kJ = 1e+9 µJ
- Kilojoules to Nanojoules1 kJ = 1e+12 nJ
- Kilojoules to Calories1 kJ = 239.006 cal
- Kilojoules to Watt Hours1 kJ = 0.277778 Wh
- Kilojoules to British Thermal Units1 kJ = 0.947813 BTU
- Kilojoules to Ergs1 kJ = 1e+10 erg
See every unit on the Energy Converter.