Free Thermal Resistance Calculator
Calculate thermal resistance (R-value) of a material layer: R = d / k.
m
W/(m·K)
Thermal Resistance
2.5000 m²·K/W
Thermal Resistance vs Material Thickness
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.
Example Calculation
10 cm of fiberglass insulation (k = 0.04 W/(m·K)).
- 01R = d / k
- 02R = 0.1 / 0.04
- 03R = 2.5 m²·K/W
Frequently Asked Questions
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