▸ processconvert
Thermal Capacity

BTU/°Ftokcal/K

Convert British thermal units per degree Fahrenheit (BTU/°F) to kilocalories per kelvin (kcal/K).

Factor1 BTU/°F = 0.4538959 kcal/K

Converter

BTU/°F

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

Result
0.453896kcal/K

Rendered to 6 significant figures.

Formula

Formula
kcal/K = BTU/°F × 0.4538959

Multiply any value in British thermal units per degree Fahrenheit by 0.4538959 to obtain the value in kilocalories per kelvin.

Worked example

Convert 1 BTU/°F to kcal/K.

  1. 01Start with 1 BTU/°F.
  2. 02Multiply by the conversion factor: 1 × 0.4538959 = 0.453896 kcal/K.
Result1 BTU/°F = 0.453896 kcal/K

Conversion table

BTU/°Fkcal/K
10.4539
20.90779
52.2695
104.539
209.0779
5022.695
10045.39
20090.779
500226.95
1000453.9

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/°F to kcal/K?
1 BTU/°F equals 0.4538959 kcal/K. To convert, multiply the value in British thermal units per degree Fahrenheit by 0.4538959.
How do I convert 1 BTU/°F to kcal/K?
1 BTU/°F = 0.453896 kcal/K. For any value, multiply by 0.4538959.
How do I convert kcal/K back to BTU/°F?
Divide by the same factor — or equivalently, multiply by 2.203148. So 1 kcal/K = 2.20315 BTU/°F.
When would I need to convert British thermal unit per degree Fahrenheit to kilocalorie per kelvin?
Thermal-capacity conversions between BTU/°F and kcal/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).

Related conversions