Megajoules (MJ) to Calories (cal) Conversion
Megajoules
The megajoule (MJ) is a unit of energy equal to exactly 1,000,000 joules (10⁶ J). It is used in energy policy, engineering, and physics for large-scale energy quantities. One kilowatt-hour (kWh) equals exactly 3.6 MJ — the conversion fundamental to understanding electricity bills. A litre of petrol contains approximately 34 MJ of chemical energy. The explosive yield of conventional explosives is sometimes expressed in megajoules.
Calories
The calorie (cal) is a unit of energy equal to exactly 4.184 joules, defined as the energy required to raise the temperature of one gram of water by one degree Celsius at 15 °C. This is the thermochemical calorie — distinct from the food calorie (written as Cal or kcal), which is 1,000 times larger. The calorie originated in 19th-century thermodynamics before the joule was established as the SI standard, and persists in chemistry, biology, and food science.
| Megajoules (MJ) | Calories (cal) |
|---|---|
| 0.1 MJ | 23,900.5736 cal |
| 1 MJ | 239,005.7361 cal |
| 2 MJ | 478,011.4723 cal |
| 3 MJ | 717,017.2084 cal |
| 5 MJ | 1,195,028.6807 cal |
| 10 MJ | 2,390,057.3614 cal |
| 20 MJ | 4,780,114.7228 cal |
| 30 MJ | 7,170,172.0841 cal |
| 50 MJ | 11,950,286.8069 cal |
| 100 MJ | 23,900,573.6138 cal |
| 1000 MJ | 239,005,736.1377 cal |
Frequently Asked Questions (FAQ)
How many calories are in 1 megajoules?
1 megajoules (MJ) is exactly 239,006 calories (cal).
How do I convert megajoules to calories?
Multiply the value in megajoules by 239,006 to get the result in calories. Or use the converter above — type any number and see the result instantly.