Power and Energy
kWhtoMJ
Convert kilowatt-hours (kWh) to megajoules (MJ).
Factor1 kWh = 3.6 MJ
Converter
kWh
Accepts numbers or expressions, e.g. 150 + 14.7
Result
MJ
Rendered to 6 significant figures.
Formula
Formula
MJ = kWh × 3.6
Multiply any value in kilowatt-hours by 3.6 to obtain the value in megajoules.
Worked example
Convert 100 kWh to MJ.
- 01Start with 100 kWh.
- 02Multiply by the conversion factor: 100 × 3.6 = 360 MJ.
Result100 kWh = 360 MJ
Conversion table
| kWh | MJ |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 5 | 18 |
| 10 | 36 |
| 20 | 72 |
| 50 | 180 |
| 100 | 360 |
| 200 | 720 |
| 500 | 1800 |
| 1000 | 3600 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kWh to MJ?
1 kWh equals 3.6 MJ. To convert, multiply the value in kilowatt-hours by 3.6.
How do I convert 1 kWh to MJ?
1 kWh = 3.6 MJ. For any value, multiply by 3.6.
How do I convert MJ back to kWh?
Divide by the same factor — or equivalently, multiply by 0.2777778. So 1 MJ = 0.277778 kWh.
When would I need to convert kilowatt-hour to megajoule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
Yes. Both kWh and MJ are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).