Convert Kilowatt-hour to Megajoule
Enter the number of kilowatt-hours that you want to convert to megajoules.
How to Convert Kilowatt-hours to Megajoules
The kilowatt-hour and megajoule are both units of energy. 1 kilowatt-hour equals 3.6 megajoules. This means to convert kilowatt-hours to megajoules, you multiply by 3.6.
Formula
Step-by-Step Example
Convert 5 kWh to megajoules:
We need to convert kilowatt-hours to megajoules
Since 1 kWh = 3.6 MJ, multiply by 3.6
5 × 3.6 = 18
5 kWh = 18 MJ
Kilowatt-hour to Megajoule Conversion Table
Quick reference table for common kilowatt-hour to megajoule conversions. Click any value for detailed calculation.
| Kilowatt-hours (kWh) | Megajoules (MJ) |
|---|---|
| 1 kWh | 3.6 MJ |
| 2 kWh | 7.2 MJ |
| 5 kWh | 18 MJ |
| 10 kWh | 36 MJ |
| 15 kWh | 54 MJ |
| 20 kWh | 72 MJ |
| 25 kWh | 90 MJ |
| 50 kWh | 180 MJ |
| 100 kWh | 360 MJ |
About These Units
Kilowatt-hour (kWh)
A kilowatt-hour (kWh) is the standard unit for electricity billing, equal to 1,000 watt-hours or 3.6 megajoules. Average US home uses 900 kWh monthly. Running a 100W bulb for 10 hours uses 1 kWh. Electricity costs $0.10-0.30 per kWh typically.
Megajoule (MJ)
A megajoule (MJ) equals 1,000,000 joules or approximately 0.278 kilowatt-hours. Megajoules measure fuel energy content (gasoline: ~34 MJ/liter), industrial processes, and large-scale energy consumption. One MJ equals about 239 kilocalories.
Frequently Asked Questions
How do I convert kilowatt-hours to megajoules?
To convert kilowatt-hours to megajoules, multiply the value by 3.6. For example, 10 kWh = 36 MJ.
How many megajoules are in 1 kilowatt-hour?
1 kilowatt-hour equals 3.6 megajoules.
What is the formula for kilowatt-hours to megajoules?
The formula is: MJ = kWh × 3.6.