Thermal conductivity and resistivity

Thermal conductivity is the quantity of heat that passes in unit time through unit area of a plate whose thickness is unity, when its opposite faces differ in temperature by one degree.

In the SI system of units, thermal conductivity is measured in watts per meter-kelvin, (Wm^-1K^-1) where a

• watt is the unit of power
• meter is the unit of distance
• kelvin is the unit of temperature