Thermal Resistance Converter
Convert thermal resistance between the listed units.
Open toolThermal Resistance Calculator
Planar thermal resistance = thickness / (conductivity × area). One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance.
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Enter the inputs, then select Calculate.
Your result
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Result will appear here
How Thermal Resistance Calculator works
Planar thermal resistance = thickness / (conductivity × area).
One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
How to use Thermal Resistance Calculator
Follow the labelled inputs.
Enter layer thickness (m)
Replace the example with layer thickness (m). The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
Set thermal conductivity (w/(m·k)), layer area (m²). One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance.
Tool result
Run, review and save
Select Calculate. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Thermal Resistance Calculator
Check the supplied example
The starting example produces 0.1 K/W. Planar thermal resistance = thickness / (conductivity × area).
Use your own inputs
Read the labels for layer thickness (m) and thermal conductivity (w/(m·k)), layer area (m²). One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance.
Record a reviewed result
Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.
How to read the result
Read the units and assumptions with the output.
Planar thermal resistance = thickness / (conductivity × area).
One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
Supported input and limits
Check the stated scope before you run it.
One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolThermal Resistance Calculator: common questions
Answers about using Thermal Resistance Calculator and understanding its results.
What assumptions and input limits apply?
One homogeneous flat layer, steady one-dimensional conduction; no convection, radiation or contact resistance. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
How can I save the output?
Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.
Calculate with your input
Check the calculated result, then copy or download it.