Convert kJ to MJ
Enter the number of kilojoules that you want to convert to megajoules.
How to Convert Kilojoules to Megajoules
The kilojoule and megajoule are both units of energy. By definition, 1 megajoule equals exactly 1000 kilojoules. This means to convert kilojoules to megajoules, you divide by 1000.
Formula
Step-by-Step Example
Convert 5 kJ to megajoules:
We need to convert kilojoules to megajoules
Since 1 MJ = 1000 kJ, divide by 1000
5 ÷ 1000 = 0.005
5 kJ = 0.005 MJ
Kilojoule to Megajoule Conversion Table
Quick reference table for common kilojoule to megajoule conversions. Click any value for detailed calculation.
| Kilojoules (kJ) | Megajoules (MJ) |
|---|---|
| 0.1 kJ | 0.0001 MJ |
| 0.5 kJ | 0.0005 MJ |
| 1 kJ | 0.001 MJ |
| 2 kJ | 0.002 MJ |
| 5 kJ | 0.005 MJ |
| 10 kJ | 0.01 MJ |
| 25 kJ | 0.025 MJ |
| 50 kJ | 0.05 MJ |
| 100 kJ | 0.1 MJ |
About These Units
Kilojoule (kJ)
A kilojoule (kJ) equals 1,000 joules or approximately 239 calories. Kilojoules measure food energy on nutrition labels in Australia, Europe, and many countries. An average adult needs 8,400-10,000 kJ daily. One kJ equals approximately 0.239 kcal.
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 kilojoules to megajoules?
To convert kilojoules to megajoules, divide the value by 1000. For example, 10 kJ = 0.01 MJ.
How many megajoules are in 1 kilojoule?
1 kilojoule equals 0.001 megajoules.
What is the formula for kilojoules to megajoules?
The formula is: MJ = kJ ÷ 1000.