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Thermal Capacity

mJ/KtoBTU/°F

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

Factor1 mJ/K = 5.265651e-7 BTU/°F

Converter

mJ/K

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

Result
0.526565BTU/°F

Rendered to 6 significant figures.

Formula

Formula
BTU/°F = mJ/K × 5.265651e-7

Multiply any value in millijoules per kelvin by 5.265651e-7 to obtain the value in British thermal units per degree Fahrenheit.

Worked example

Convert 1.00000e+6 mJ/K to BTU/°F.

  1. 01Start with 1.00000e+6 mJ/K.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 5.265651e-7 = 0.526565 BTU/°F.
Result1.00000e+6 mJ/K = 0.526565 BTU/°F

Conversion table

mJ/KBTU/°F
15.2657e-7
21.0531e-6
52.6328e-6
105.2657e-6
201.0531e-5
502.6328e-5
1005.2657e-5
2000.00010531
5000.00026328
10000.00052657

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mJ/K to BTU/°F?
1 mJ/K equals 5.265651e-7 BTU/°F. To convert, multiply the value in millijoules per kelvin by 5.265651e-7.
How do I convert 1 mJ/K to BTU/°F?
1 mJ/K = 5.26565e-7 BTU/°F. For any value, multiply by 5.265651e-7.
How do I convert BTU/°F back to mJ/K?
Divide by the same factor — or equivalently, multiply by 1899101. So 1 BTU/°F = 1.89910e+6 mJ/K.
When would I need to convert millijoule per kelvin to British thermal unit per degree Fahrenheit?
Thermal-capacity conversions between mJ/K and BTU/°F 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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