What Is This Tool?
This converter transforms thermal conductivity measurements from the Imperial unit Btu (IT) foot/hour/square foot/°F to the SI derived unit watt/meter/K [W/(m*K)]. It supports applications in construction, HVAC design, and material science by enabling conversions between measurement systems.
How to Use This Tool?
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Enter the thermal conductivity value in Btu (IT) foot/hour/sq. foot/°F.
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Select the source unit as Btu (IT) foot/hour/sq. foot/°F.
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Choose the target unit watt/meter/K [W/(m*K)].
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Click convert to get the equivalent value in watts per meter per kelvin.
Key Features
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Converts thermal conductivity between Imperial and metric units accurately.
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Supports building and HVAC material specification calculations.
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Browser-based and easy to use without software installation.
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Facilitates engineering analyses involving heat transfer properties.
Examples
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2 Btu/(h·ft·°F) converts to approximately 3.4615 W/(m·K).
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0.5 Btu/(h·ft·°F) converts to approximately 0.8654 W/(m·K).
Common Use Cases
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Specifying thermal conductivity for building materials like insulation and brick.
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Performing steady-state heat conduction calculations in building simulations.
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Translating thermal properties between Imperial and SI units for engineering analyses.
Tips & Best Practices
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Ensure consistent material thickness and temperature scale units to avoid conversion errors.
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Use the tool for steady-state conduction scenarios with uniform material properties.
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Verify converted values when working with international standards and regulations.
Limitations
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Unit differences in thickness (feet vs meters) and temperature (°F vs K) require caution.
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The tool assumes steady-state and isotropic conditions; transient or anisotropic cases need specialized methods.
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Imperial units are less common internationally, so careful verification is essential.
Frequently Asked Questions
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What does Btu (IT) foot/hour/sq. foot/°F measure?
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It measures thermal conductivity as heat flow in Btu per hour through a 1-foot-thick material with 1 ft² area and a 1°F temperature difference.
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Why convert to watt/meter/K [W/(m*K)]?
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Because it is the SI derived unit widely used in international engineering and scientific applications for thermal conductivity.
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Is the conversion valid for transient heat transfer?
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No, the conversion assumes steady-state conduction and uniform properties, not transient or varying conditions.
Key Terminology
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Btu (IT) foot/hour/sq. foot/°F
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An Imperial unit of thermal conductivity representing steady heat flow through a 1-foot thickness for a 1°F temperature difference.
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Watt/meter/K [W/(m*K)]
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The SI derived unit measuring thermal conductivity, indicating heat transfer rate per meter thickness and kelvin temperature difference.
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Thermal Conductivity
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A material property quantifying the rate at which heat passes through a material.