Megajoules (MJ) to Kilojoules (kJ) 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.
Kilojoules
The kilojoule (kJ) is a unit of energy equal to exactly 1,000 joules. It is the standard unit for expressing food energy in most countries outside the United States, where food labels display energy in both kilojoules and kilocalories (kcal). One kilocalorie equals exactly 4.184 kilojoules. In thermodynamics and chemistry, reaction enthalpies and bond energies are commonly tabulated in kilojoules per mole (kJ/mol).
| Megajoules (MJ) | Kilojoules (kJ) |
|---|---|
| 0.1 MJ | 100 kJ |
| 1 MJ | 1000 kJ |
| 2 MJ | 2000 kJ |
| 3 MJ | 3000 kJ |
| 5 MJ | 5000 kJ |
| 10 MJ | 10000 kJ |
| 20 MJ | 20000 kJ |
| 30 MJ | 30000 kJ |
| 50 MJ | 50000 kJ |
| 100 MJ | 100000 kJ |
| 1000 MJ | 1000000 kJ |
Frequently Asked Questions (FAQ)
How many kilojoules are in 1 megajoules?
1 megajoules (MJ) is exactly 1,000.00 kilojoules (kJ).
How do I convert megajoules to kilojoules?
Multiply the value in megajoules by 1,000.00 to get the result in kilojoules. Or use the converter above — type any number and see the result instantly.