Power and Energy
kJtocal
Convert kilojoules (kJ) to thermochemical calories (cal).
Factor1 kJ = 239.0057 cal
Converter
kJ
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal
Rendered to 6 significant figures.
Formula
Formula
cal = kJ × 239.0057
Multiply any value in kilojoules by 239.0057 to obtain the value in thermochemical calories.
Worked example
Convert 10 kJ to cal.
- 01Start with 10 kJ.
- 02Multiply by the conversion factor: 10 × 239.0057 = 2390.06 cal.
Result10 kJ = 2390.06 cal
Conversion table
| kJ | cal |
|---|---|
| 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 kJ to cal?
1 kJ equals 239.0057 cal. To convert, multiply the value in kilojoules by 239.0057.
How do I convert 1 kJ to cal?
1 kJ = 239.006 cal. For any value, multiply by 239.0057.
How do I convert cal back to kJ?
Divide by the same factor — or equivalently, multiply by 0.004184. So 1 cal = 0.004184 kJ.
When would I need to convert kilojoule to thermochemical calorie?
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).