kWh to MJ – convert kilowatt-hours to megajoules
Convert kWh to MJ (kilowatt-hours to megajoules) for electricity bills, gas usage, engineering, and science. This page links to the main energy converter with kWh → MJ pre-selected.
Open the interactive kWh → MJ converter:
Use main converter (kWh → MJ) or switch to MJ → kWhOn the homepage you can also convert to joules, watt-hours, BTU and kilocalories using the same energy engine.
Quick reference: kWh to MJ
The exact relationship is 1 kWh = 3.6 MJ. Some common examples:
| Energy (kWh) | Energy (MJ) |
|---|---|
| 0.5 kWh | 1.8 MJ |
| 1 kWh | 3.6 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 50 kWh | 180 MJ |
| 100 kWh | 360 MJ |
Why convert kWh to MJ?
Typical reasons to convert kWh to MJ include:
- Comparing electricity usage (kWh) with gas usage quoted in MJ.
- Converting household bills into scientific or engineering units.
- Working out the energy content of fuels versus electrical energy.
- Normalising energy data from different sources into a single unit.
More energy converters on this site
On the main converter, all energy units convert via joules as a base, keeping kWh, MJ, BTU and calories consistent.
Page last updated: 2 December 2025.