Thermal Resistance Calculator

Your details

Select the type of thermal resistance to compute.
Select a material to auto-fill thermal conductivity, or choose Custom.
Thermal conductivity of the material. Auto-populated from material selection.
W/(m·K)
The distance heat travels through the material, in metres.
m
The surface area perpendicular to the direction of heat flow, in square metres.
m²
Temperature difference across the resistance (hot side minus cold side). Used to compute heat flow rate.
K
Thermal resistance (R)Very low resistance (excellent conductor)
0K/W

Total thermal resistance of the object or network

Thermal conductance (U)40,100W/K
Heat flow rate (Q)2,005,000W
Thermal resistance (K/W)0
Thermal conductance (W/K)40,100

Thermal resistance is 0.0000 K/W.

  • Thermal conductance is 40100.0000 W/K - every 1 K of temperature difference drives 40100.0000 W of heat transfer.
  • With a 50 K temperature difference, 2005000.000 W flows through the resistance.
  • For flat plates: doubling material thickness doubles resistance; halving area also doubles resistance.

Next stepCombine this result with convection boundary resistances (1/hA) in a series network to find total wall-to-fluid resistance.

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