Thermal Resistance Converter
Convert between various units of thermal resistance (e.g., K/W, °F·h/Btu).
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Understanding Thermal Resistance
Thermal resistance (Rth) is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow. Thermal resistance is the reciprocal of thermal conductance.
Formula: Rth = ΔT / q, where ΔT is the temperature difference across the material and q is the heat flow rate (power).
The SI unit for thermal resistance is Kelvin per Watt (K/W) or equivalently degrees Celsius per Watt (°C/W).
| Unit Name | Symbol | Relation to K/W (Approx.) |
|---|---|---|
| Kelvin/watt | K/W | Base unit (1 K/W) |
| degree Celsius/watt | °C/W | 1 °C/W = 1 K/W |
| degree Fahrenheit/watt | °F/W | 1 °F/W ≈ 0.5556 K/W |
| degree Fahrenheit hour/Btu (IT) | °F·h/BtuIT | 1 °F·h/BtuIT ≈ 1.8956 K/W |
| degree Fahrenheit hour/Btu (th) | °F·h/Btuth | 1 °F·h/Btuth ≈ 1.8969 K/W |
| degree Fahrenheit second/Btu (IT) | °F·s/BtuIT | 1 °F·s/BtuIT ≈ 0.0005266 K/W |