# SI unit of thermal conductivity is

The SI unit of thermal conductivity is Watt per metre Kelvin.

The dimensional formula of thermal conductivity is M1L1T-2θ-1.

Thermal conductivity is defined as the ability of a material to transfer the heat. Following is the formula of thermal conductivity:

 $$\begin{array}{l}k=\frac{Q\times L}{A(T_{2}-T_{1})}\end{array}$$

Where,

• k is the thermal conductivity
• Q is heat flow
• A is the surface area of the material
• T2 – T1 is the temperature gradient