Megajoule (MJ)
The megajoule is a unit of energy, used for vehicle kinetic energy, natural gas billing, and industrial energy audits. Its symbol is MJ.
MJ
kWh
1 megajoule equals
| Kilowatt-hours | 0.277778 kWh |
| Kilocalories | 239.006 kcal |
| Joules | 1,000,000 J |
| British Thermal Units | 947.817 BTU |
About the megajoule
The megajoule entered common use in energy engineering and vehicle crash testing as SI units replaced older conventions in the late 20th century.
In everyday use the megajoule appears in vehicle kinetic energy, natural gas billing, and industrial energy audits. As a point of reference: a car at highway speed carries about 0.5 MJ of kinetic energy.