Power and Energy
GJtokcal
Convert gigajoules (GJ) to kilocalories (kcal).
Factor1 GJ = 239005.7 kcal
Converter
GJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kcal
Rendered to 6 significant figures.
Formula
Formula
kcal = GJ × 239005.7
Multiply any value in gigajoules by 239005.7 to obtain the value in kilocalories.
Worked example
Convert 1 GJ to kcal.
- 01Start with 1 GJ.
- 02Multiply by the conversion factor: 1 × 239005.7 = 239006 kcal.
Result1 GJ = 239006 kcal
Conversion table
| GJ | kcal |
|---|---|
| 1 | 2.3901e+5 |
| 2 | 4.7801e+5 |
| 5 | 1.1950e+6 |
| 10 | 2.3901e+6 |
| 20 | 4.7801e+6 |
| 50 | 1.195e+7 |
| 100 | 2.3901e+7 |
| 200 | 4.7801e+7 |
| 500 | 1.195e+8 |
| 1000 | 2.3901e+8 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from GJ to kcal?
1 GJ equals 239005.7 kcal. To convert, multiply the value in gigajoules by 239005.7.
How do I convert 1 GJ to kcal?
1 GJ = 239006 kcal. For any value, multiply by 239005.7.
How do I convert kcal back to GJ?
Divide by the same factor — or equivalently, multiply by 4.184e-6. So 1 kcal = 4.184e-6 GJ.
When would I need to convert gigajoule 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).