1 Megajoule equals about
0,278 kWh
The Megajoule (MJ) is a multiple of the Joule, the SI energy unit, often used in building energy certificates and equipment technical specifications, while the kilowatt-hour (kWh) is the more familiar unit for everyday electrical consumption. One Megajoule equals about 0.2778 kWh.
To convert a measurement from Megajoules to kWh, simply multiply the value by 0.2778:
To convert from kWh to Megajoules, perform the inverse operation, multiplying by 3.6:
This conversion is particularly useful for reading a building's Energy Performance Certificate, where energy demand is often expressed in MJ/m² per year, but needs to be compared with electricity consumption reported on bills, typically in kWh.