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BTU/(hr·ft·°F)
0.5778 BTU/(hr·ft·°F)
Formula
How to Convert Thermal Conductivity Units
Formula
BTU/(hr·ft·°F) = W/(m·K) x 0.5778
Thermal conductivity describes how well a material conducts heat. The SI unit is Watts per meter-Kelvin. The imperial unit is BTU per hour-foot-degree Fahrenheit. The conversion factor of 0.5778 combines the energy conversion (W to BTU/hr), length conversion (m to ft), and temperature conversion (K to °F interval).
Reference Values
Exemplo Resolvido
Convert 1 W/(m·K) to BTU/(hr·ft·°F).
- 01Apply the conversion factor: 1 W/(m·K) = 0.5778 BTU/(hr·ft·°F)
- 02BTU/(hr·ft·°F) = 1 * 0.5778 = 0.5778
- 03Also: 1 W/(m·K) = 0.002388 cal/(s·cm·°C)
Perguntas Frequentes
What does thermal conductivity measure?
It measures the rate at which heat passes through a material per unit area per unit temperature gradient. High values mean the material is a good heat conductor; low values indicate an insulator.
Why are there different unit systems for thermal conductivity?
The SI system (W/(m·K)) is used internationally, while the imperial system (BTU/(hr·ft·°F)) is common in US HVAC and building codes. Conversion is necessary when working across systems.
How does thermal conductivity relate to R-value?
R-value (thermal resistance) is the inverse of conductance. For a slab of material, R = thickness / thermal conductivity. Higher R-values indicate better insulation.
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