Thermal Resistance Calculator Formula
Understand the math behind the thermal resistance calculator. Each variable explained with a worked example.
Formulas Used
Thermal Resistance
thermal_resistance = thickness / conductivityVariables
| Variable | Description | Default |
|---|---|---|
thickness | Material Thickness(m) | 0.1 |
conductivity | Thermal Conductivity(W/(m·K)) | 0.04 |
How It Works
Thermal Resistance
Thermal resistance quantifies how well a material layer resists heat flow.
Formula
R = d / k
where d is thickness and k is thermal conductivity. Higher R means better insulation. For multiple layers, R-values add in series.
Worked Example
10 cm of fiberglass insulation (k = 0.04 W/(m·K)).
thickness = 0.1conductivity = 0.04
- 01R = d / k
- 02R = 0.1 / 0.04
- 03R = 2.5 m²·K/W
Ready to run the numbers?
Open Thermal Resistance Calculator