How to convert kilowatt-hours to megajoules
MJ = kWh × 3.6
Example: 5 kWh × 3.6 = 18 MJ
Kilowatt-hours to Megajoules table
| Kilowatt-hours (kWh) | Megajoules (MJ) |
|---|---|
| 0.5 kWh | 1.8 MJ |
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 MJ |
| 4 kWh | 14.4 MJ |
| 5 kWh | 18 MJ |
| 6 kWh | 21.6 MJ |
| 7 kWh | 25.2 MJ |
| 8 kWh | 28.8 MJ |
| 9 kWh | 32.4 MJ |
| 10 kWh | 36 MJ |
| 15 kWh | 54 MJ |
| 20 kWh | 72 MJ |
| 25 kWh | 90 MJ |
| 30 kWh | 108 MJ |
| 40 kWh | 144 MJ |
| 50 kWh | 180 MJ |
| 75 kWh | 270 MJ |
| 100 kWh | 360 MJ |
| 250 kWh | 900 MJ |
| 500 kWh | 1,800 MJ |
| 1,000 kWh | 3,600 MJ |
About these units
Kilowatt-hours (kWh): A kilowatt-hour is 3.6 megajoules – the unit on electricity bills.
Megajoules (MJ): A megajoule is 1,000,000 joules, used for fuel energy and industrial processes.
Frequently asked questions
How many megajoules are in 1 kilowatt-hour?
1 kilowatt-hour (kWh) equals 3.6 megajoules (MJ).
How do I convert kWh to MJ?
Multiply the value in kilowatt-hours by 3.6. For example, 5 kWh × 3.6 = 18 MJ.
How do I convert megajoules back to kilowatt-hours?
Multiply by 0.2777777778 (or divide by 3.6). 1 MJ = 0.2777777778 kWh.
What is a kilowatt-hour?
A kilowatt-hour is 3.6 megajoules – the unit on electricity bills.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every energy unit at once? Use the Energy Converter.