Enter the thermal conductivity constant, the temperature difference, and change in distance to calculate the heat flux of an object.

## Thermal Conductivity Formula

The following equation is used to calculate the heat flux, q, of a material. This is equation is driven and derived through Fourier’s law of heat flux.

q = – n * ΔT / Δx

- Where q is the heat flux (W/m^2)
- Δx is the distance the heat is transferred through a material
- ΔT is the change in temperature across the material
- n is the thermal conductivity of the material

The units for heat flux are watts per meters squared or in other words, energy per area. This makes logical since in that a change in temperature across an object is the same as the change in energy across the area of the object. In this formula it’s important to keep in mind that the units for x need to be in meters and the units for temperature need to be in Kelvin.

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