Heat Conduction Calculator

Calculate heat conduction through a flat wall using Fourier’s law. Solve for heat transfer rate, thermal conductivity, area, thickness or temperature.

1. Choose what to calculate

What do you want to calculate?

2. Enter known values

Material and geometry

Use the material conductivity at the relevant temperature, in the selected unit.

Enter the value in the selected unit. Changing the unit converts the value.

Temperatures

Input units: °C / K / °F. Each input uses its selected unit; changing units converts values automatically.

Heat transfer

Q uses the signed difference T₂ − T₁. A negative Q indicates the reverse direction. Conductivity, area, and thickness are positive magnitudes.

Resets fields and units to their defaults. Saved calculations remain.

Save calculation

Saves the inputs, selected units, and current calculated result.