Power and Energy
MJtokJ
Convert megajoules (MJ) to kilojoules (kJ).
Factor1 MJ = 1000 kJ
Converter
MJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kJ
Rendered to 6 significant figures.
Formula
Formula
kJ = MJ × 1000
Multiply any value in megajoules by 1000 to obtain the value in kilojoules.
Worked example
Convert 1 MJ to kJ.
- 01Start with 1 MJ.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 kJ.
Result1 MJ = 1000 kJ
Conversion table
| MJ | kJ |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from MJ to kJ?
1 MJ equals 1000 kJ. To convert, multiply the value in megajoules by 1000.
How do I convert 1 MJ to kJ?
1 MJ = 1000 kJ. For any value, multiply by 1000.
How do I convert kJ back to MJ?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 kJ = 0.001 MJ.
When would I need to convert megajoule to kilojoule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).