Thermal Capacity
J/Ktocal/K
Convert joules per kelvin (J/K) to calories per kelvin (cal/K).
Factor1 J/K = 0.2390057 cal/K
Converter
J/K
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/K
Rendered to 6 significant figures.
Formula
Formula
cal/K = J/K × 0.2390057
Multiply any value in joules per kelvin by 0.2390057 to obtain the value in calories per kelvin.
Worked example
Convert 1 J/K to cal/K.
- 01Start with 1 J/K.
- 02Multiply by the conversion factor: 1 × 0.2390057 = 0.239006 cal/K.
Result1 J/K = 0.239006 cal/K
Conversion table
| J/K | cal/K |
|---|---|
| 1 | 0.23901 |
| 2 | 0.47801 |
| 5 | 1.195 |
| 10 | 2.3901 |
| 20 | 4.7801 |
| 50 | 11.95 |
| 100 | 23.901 |
| 200 | 47.801 |
| 500 | 119.5 |
| 1000 | 239.01 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from J/K to cal/K?
1 J/K equals 0.2390057 cal/K. To convert, multiply the value in joules per kelvin by 0.2390057.
How do I convert 1 J/K to cal/K?
1 J/K = 0.239006 cal/K. For any value, multiply by 0.2390057.
How do I convert cal/K back to J/K?
Divide by the same factor — or equivalently, multiply by 4.184. So 1 cal/K = 4.184 J/K.
When would I need to convert joule per kelvin to calorie per kelvin?
Thermal-capacity conversions between J/K and cal/K appear in thermal-mass analysis of bodies, calorimetry, R-C thermal-network modelling, electronics thermal capacitance and large-equipment thermal-storage sizing. J/K and kJ/K are the SI standard; MJ/K and kWh/K cover large-equipment and building thermal-mass notation; BTU/°F is the US convention; cal/K and kcal/K are common in chemistry and thermochemistry. This category is lumped heat capacity only — it does NOT include specific heat capacity (J/(kg·K), requires mass), molar heat capacity (J/(mol·K), requires molecular weight) or volumetric heat capacity, all of which are different physical quantities.
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).