Convert joule to megajoule
Enter the value to convert from joule to megajoule.
How to Convert Joule to Megajoule
Converting joule to megajoule is straightforward using our conversion calculator.
Conversion Formula
MJ = J ÷ 1000000Reverse conversion: Convert megajoule to joule
Comparison: Joule vs Megajoule
When to Use Each Unit
Joule: Universal scientific unit for all forms of energy: mechanical, electrical, thermal, chemical, and nuclear energy worldwide.
Megajoule: Used for fuel energy content, large-scale heating, industrial processes, and transportation energy.
Common Conversion Values
- 1000 J = 1 kJ
- 1 J ≈ 0.239 cal
- 3,600,000 J = 1 kWh
- 1 J ≈ 0.738 ft⋅lbf
About Joule
Definition: The joule (symbol: J) is the SI unit of energy, equal to the energy expended when applying one newton of force through one meter of distance.
History: Named after English physicist James Prescott Joule in 1889. Established the mechanical equivalent of heat and energy conservation.
Current Use: Universal scientific unit for all forms of energy: mechanical, electrical, thermal, chemical, and nuclear energy worldwide.
Examples: Apple: 350,000 J, car battery: 4.3 MJ, lightning bolt: 1-5 billion J, human daily intake: 8-10 MJ
About Megajoule
Definition: The megajoule (symbol: MJ) is equal to one million joules, used for large-scale energy measurements.
History: Large-scale metric prefix for measuring substantial energy quantities in industrial and scientific applications.
Current Use: Used for fuel energy content, large-scale heating, industrial processes, and transportation energy.
Examples: Gasoline liter: 32 MJ, natural gas m³: 37 MJ, coal kg: 24 MJ, home daily energy: 50-150 MJ