Physics

Thermal Resistance Calculator

Find the thermal resistance of a material layer.

Thickness

Thermal conductivity (W/(m·K))

Area

Calculated Output

Thermal resistance (K/W) 2.5

Formula: R = d ÷ (k·A)

Step-by-Step Breakdown

1. Values used:

2. Thickness = 0.1

3. Thermal conductivity = 0.04 W/(m·K)

4. Area = 1

6. Thermal resistance = Thickness / Thermal conductivity = 0.1 / 0.04 = 2.5K/W

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The math behind it

R = d ÷ (k·A). Higher resistance means better insulation.

0.1 m of insulation (k 0.04) over 1 m² → 2.5 K/W.

How does this relate to R-value?

R-value is the per-area resistance d/k; this also divides by area.