How to convert energy units
Joules × 1 ÷ 1000 = Kilojoules. Factors are relative to joules.
Multiply your input by its scale factor, then divide by the output unit’s factor. All factors below are expressed in joules per one unit. Some factors have been rounded to the precision shown.
| Unit | Factor in joules |
|---|---|
| Joules | 1 |
| Kilojoules | 1000 |
| Megajoules | 1000000 |
| Watt-hours | 3600 |
| Kilowatt-hours | 3600000 |
| Calories (thermochemical) | 4.184 |
| Kilocalories (thermochemical) | 4184 |
| BTU (IT) | 1055.05585262 |
| Foot-pounds | 1.3558179483314 |
| Electron volts | 1.602176634e-19 |
Conventions
These are scale conversions within a single measurement dimension. They do not convert between different physical quantities.
Example conversion routes
- Joules to Kilojoules
- Joules to Megajoules
- Joules to Watt-hours
- Joules to Kilowatt-hours
- Joules to Calories (thermochemical)
- Joules to Kilocalories (thermochemical)
- Joules to BTU (IT)
- Joules to Foot-pounds
- Joules to Electron volts
- Kilojoules to Joules
- Kilojoules to Megajoules
- Kilojoules to Watt-hours
- Kilojoules to Kilowatt-hours
- Kilojoules to Calories (thermochemical)
- Kilojoules to Kilocalories (thermochemical)
- Kilojoules to BTU (IT)
The directory lists each direction as a conversion route. These routes share this workspace and canonical page to avoid creating repetitive pages for the same converter.