British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb- degF) is a unit in the category of Specific heat. This unit is commonly used in the UK unit system. British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb-degF) has a dimension of \(L2T^{-2}Q^{-1}\) where \(L\) is length, \(T\) is time, and \(Q\) is temperature. It can be converted to the corresponding standard SI unit \(J/kg-K\) by multiplying its value by a factor of 4183.99895.