MJ to kWh – convert megajoules to kilowatt-hours
Convert megajoules to kilowatt-hours (MJ to kWh) to translate energy in physics or engineering units into the same kWh that appear on electricity and gas bills.
Open the interactive MJ → kWh converter:
Use main converter (MJ → kWh) or switch to kWh → MJThe energy converter also handles joules, kilojoules, BTU and more for engineering and building services work.
Quick reference: MJ to kWh
One kilowatt-hour equals 3.6 MJ, so: kWh = MJ ÷ 3.6. Some useful examples:
| Energy (MJ) | Energy (kWh, approx.) |
|---|---|
| 1 MJ | 0.28 kWh |
| 5 MJ | 1.39 kWh |
| 10 MJ | 2.78 kWh |
| 20 MJ | 5.56 kWh |
| 50 MJ | 13.89 kWh |
| 100 MJ | 27.78 kWh |
Why convert MJ to kWh?
MJ to kWh is helpful when you:
- Compare gas usage (often quoted in MJ or kJ) with electricity in kWh.
- Estimate running costs of heaters, cookers or industrial equipment.
- Relate battery or fuel energy content to household energy bills.
- Translate engineering or physics calculations into everyday units.
Other energy converters on this site
For many billing calculations, rounding to two decimal places is usually accurate enough, but the main converter keeps higher precision.
Page last updated: 4 December 2025.