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Fourier's Law Thermal Conductivity Calculator

Q/t = k·A·ΔT/d — heat flow through a slab.

Calculates steady-state heat transfer rate through a flat wall or slab using Fourier's Law of conduction from thermal conductivity, area, temperature difference, and thickness.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Q_dot = k × A × ΔT / d (W)

In depth

Calculates steady-state heat transfer rate through a flat wall or slab using Fourier's Law of conduction from thermal conductivity, area, temperature difference, and thickness.