Kilowatt-hour to Megajoule Converter
1 kilowatt-hour is exactly 3.6 megajoules. Convert kilowatt-hours (kWh) to megajoules (MJ) below: type a value and the result updates as you type.
kWh to MJ calculator
Result
Kilowatt-hour to Megajoule conversion
1 kWh = 3.6 MJone kilowatt-hour in megajoules
1 MJ ≈ 0.2777777778 kWhone megajoule in kilowatt-hours
Kilowatt-hour (kWh): Exactly 3 600 000 joules (3.6 megajoules).
Megajoule (MJ): Exactly one million joules.
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert kilowatt-hours to megajoules
To convert kilowatt-hours to megajoules, multiply the number of kilowatt-hours by 3.6.
Formula
MJ = kWh × 3.6
Examples
- 5 kWh = 5 × 3.6 = 18 MJ
- 25 kWh = 25 × 3.6 = 90 MJ
- 100 kWh = 100 × 3.6 = 360 MJ
Kilowatt-hour to Megajoule conversion table
| Kilowatt-hour (kWh) | Megajoule (MJ) |
|---|---|
| 0.1 kWh | 0.36 MJ |
| 0.5 kWh | 1.8 MJ |
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 3 kWh | 10.8 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 |
| 250 kWh | 900 MJ |
| 500 kWh | 1800 MJ |
| 1000 kWh | 3600 MJ |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many megajoules are in one kilowatt-hour?
- One kilowatt-hour is exactly 3.6 megajoules.
- How do I convert megajoules to kilowatt-hours?
- To convert megajoules to kilowatt-hours, divide the number of megajoules by 3.6. The formula is kWh = MJ ÷ 3.6.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 3.6 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a kilowatt-hour or a megajoule?
- A kilowatt-hour is 3.6 times larger than a megajoule. In other words, a megajoule is about 0.2777777778 of a kilowatt-hour.