Convert Kilowatt-hours to Megajoules
1 kilowatt-hour = 3.6 megajoules. Multiply the number of kilowatt-hours by 3.6.
Kilowatt-hours to Megajoules table
| Kilowatt-hours | Megajoules |
|---|---|
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 MJ |
| 4 kWh | 14.4 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 20 kWh | 72 MJ |
| 25 kWh | 90 MJ |
| 50 kWh | 180 MJ |
| 100 kWh | 360 MJ |
| 500 kWh | 1,800 MJ |
| 1000 kWh | 3,600 MJ |
Kilowatt-hours to Megajoules in your head
Multiply by 11, then divide by 3.
That lands within 2% of the exact value.
10 kWh → 36.6667 MJ in your head, 36 MJ exactly.
About these units
The kilowatt-hour (kWh) is a metric unit of energy & work, equal to 3,600,000 joules.
The megajoule (MJ) is a metric unit of energy & work, equal to 1,000,000 joules.
Going the other way, 1 megajoule = 0.27777778 kilowatt-hours. Diet calories, electricity bills in kilowatt-hours, boiler ratings in BTU and particle physics in electronvolts are all the same physical quantity. Convert energy across every scale from the atomic to the industrial.
Frequently asked
- How many megajoules are in a kilowatt-hour?
- 1 kilowatt-hour = 3.6 megajoules.
- How do you convert kilowatt-hours to megajoules?
- Multiply the number of kilowatt-hours by 3.6.
- What is 10 kWh in MJ?
- 10 kWh = 36 MJ.