What Is the Thermal Conductivity Converter?
Thermal conductivity (k or λ) quantifies a material’s intrinsic ability to conduct heat energy.
Materials with high thermal conductivity (e.g., metals) dissipate heat rapidly, whereas low-conductivity materials (insulation, foam) resist heat flow.
How Does the Thermal Conductivity Converter Work?
Input values are normalized to SI Watts per meter-Kelvin: 1 BTU/(hr·ft·°F) ≈ 1.730735 W/(m·K).
The engine simultaneously calculates Imperial BTU and metric kcal thermal transfer equivalents.
Thermal Conductivity Converter Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Thermal conductivity defines the heat transfer rate per unit thickness per degree temperature gradient across a material.
How to Use the Thermal Conductivity Converter
- Enter the numerical thermal conductivity rating.
- Select whether your input is in W/(m·K), BTU/(hr·ft·°F), or kcal/(hr·m·°C).
- Review converted engineering metrics across all units.
Step-by-Step Example Calculation
Copper (401 W/(m·K))
Input Values:
Understanding Your Result
Values below 0.1 W/(m·K) denote high-performance thermal insulators.
Values above 100 W/(m·K) denote high-performance heat conductors used for heatsinks and exchangers.
Factors That Affect the Result
- Temperature: Thermal conductivity of gases increases with temperature, while for many solids it decreases.
- Moisture: Water content severely elevates the thermal conductivity of porous insulation materials.
When Should You Use This Calculator?
- Sizing HVAC ductwork and building envelope insulation (R-value estimation).
- Designing electronics heatsinks and heat pipes.
Assumptions & Limitations
- Assumes steady-state 1-dimensional conductive heat conduction without phase change.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Conversion constants are derived from ASTM C168 and NIST engineering benchmarks.