Power and Energy
MJtokcal
Convert megajoules (MJ) to kilocalories (kcal).
Factor1 MJ = 239.0057 kcal
Converter
MJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kcal
Rendered to 6 significant figures.
Formula
Formula
kcal = MJ × 239.0057
Multiply any value in megajoules by 239.0057 to obtain the value in kilocalories.
Worked example
Convert 1 MJ to kcal.
- 01Start with 1 MJ.
- 02Multiply by the conversion factor: 1 × 239.0057 = 239.006 kcal.
Result1 MJ = 239.006 kcal
Conversion table
| MJ | kcal |
|---|---|
| 1 | 239.01 |
| 2 | 478.01 |
| 5 | 1195 |
| 10 | 2390.1 |
| 20 | 4780.1 |
| 50 | 11950 |
| 100 | 23901 |
| 200 | 47801 |
| 500 | 1.1950e+5 |
| 1000 | 2.3901e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from MJ to kcal?
1 MJ equals 239.0057 kcal. To convert, multiply the value in megajoules by 239.0057.
How do I convert 1 MJ to kcal?
1 MJ = 239.006 kcal. For any value, multiply by 239.0057.
How do I convert kcal back to MJ?
Divide by the same factor — or equivalently, multiply by 0.004184. So 1 kcal = 0.004184 MJ.
When would I need to convert megajoule to kilocalorie?
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).