The **temperature coefficient** is the relative change of a physical property when the temperature is changed by 1 Kelvin.

In the following formula, let *R* be the physical property to be measured and *T* be the temperature at which the property is measured. *T*_{0} is the reference temperature, and Δ*T* is the difference between *T* and *T*_{0}. Finally, **α** is the (linear) temperature coefficient. Given these definitions, the physical property is:

Here α has the dimensions of an inverse temperature (1/K or K−1).

This equation is linear with respect to temperature. For quantities that vary polynomially or logarithmically with temperature, it may be possible to calculate a temperature coefficient that is a useful approximation for a certain range of temperatures. For quantities that vary exponentially with temperature, such as the rate of a chemical reaction, any temperature coefficient would be valid only over a very small temperature range.

Different temperature coefficients are specified for various applications, including nuclear, electrical and magnetic.

Read more about Temperature Coefficient: Negative Temperature Coefficient, Reversible Temperature Coefficient, Temperature Coefficient of Electrical Resistance, Coefficient of Thermal Expansion, Temperature Coefficient of Elasticity, Temperature Coefficient of Reactivity, Units

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“The bourgeois treasures nothing more highly than the self.... And so at the cost of intensity he achieves his own preservation and security. His harvest is a quiet mind which he prefers to being possessed by God, as he prefers comfort to pleasure, convenience to liberty, and a pleasant *temperature* to that deathly inner consuming fire.”

—Hermann Hesse (1877–1962)