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Thermal Capacity

kJ/Ktocal/K

Convert kilojoules per kelvin (kJ/K) to calories per kelvin (cal/K).

Factor1 kJ/K = 239.0057 cal/K

Converter

kJ/K

Accepts numbers or expressions, e.g. 150 + 14.7

Result
239.006cal/K

Rendered to 6 significant figures.

Formula

Formula
cal/K = kJ/K × 239.0057

Multiply any value in kilojoules per kelvin by 239.0057 to obtain the value in calories per kelvin.

Worked example

Convert 1 kJ/K to cal/K.

  1. 01Start with 1 kJ/K.
  2. 02Multiply by the conversion factor: 1 × 239.0057 = 239.006 cal/K.
Result1 kJ/K = 239.006 cal/K

Conversion table

kJ/Kcal/K
1239.01
2478.01
51195
102390.1
204780.1
5011950
10023901
20047801
5001.1950e+5
10002.3901e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kJ/K to cal/K?
1 kJ/K equals 239.0057 cal/K. To convert, multiply the value in kilojoules per kelvin by 239.0057.
How do I convert 1 kJ/K to cal/K?
1 kJ/K = 239.006 cal/K. For any value, multiply by 239.0057.
How do I convert cal/K back to kJ/K?
Divide by the same factor — or equivalently, multiply by 0.004184. So 1 cal/K = 0.004184 kJ/K.
When would I need to convert kilojoule per kelvin to calorie per kelvin?
Thermal-capacity conversions between kJ/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).

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