Thermal Conductivity Converter - Free Online Tool

Free online thermal conductivity unit converter. Support for 5+ units with accurate Free calculator with accurate conversions, formula, and table.

🌡️ Thermal Conductivity Converter

Select your units from the lists below

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From Unit

  • Watt per Meter-kelvin

    Symbol: W/(m·K)

  • Milliwatt per Meter-kelvin

    Symbol: mW/(m·K)

  • Btu (IT) per Hour-foot-°F

    Symbol: Btu_IT/(h·ft·°F)

  • Btu (thermochemical) per Hour-foot-°F

    Symbol: Btu_th/(h·ft·°F)

  • Thermochemical Calorie per Centimeter-second-°C

    Symbol: cal_th/(cm·s·°C)
To Unit

  • Watt per Meter-kelvin

    Symbol: W/(m·K)

  • Milliwatt per Meter-kelvin

    Symbol: mW/(m·K)

  • Btu (IT) per Hour-foot-°F

    Symbol: Btu_IT/(h·ft·°F)

  • Btu (thermochemical) per Hour-foot-°F

    Symbol: Btu_th/(h·ft·°F)

  • Thermochemical Calorie per Centimeter-second-°C

    Symbol: cal_th/(cm·s·°C)

🌡️ Thermal Conductivity Converter

Thermal conductivity measures how readily a material transfers heat. Convert SI values to clearly identified Btu-based or thermochemical units for engineering and building calculations.

🌡️About Thermal Conductivity

Thermal conductivity is a material property commonly represented by k or λ. Its SI unit is watt per metre-kelvin. Imperial engineering references may use Btu per hour-foot-degree Fahrenheit, but the Btu has multiple definitions; this converter labels International Table and thermochemical Btu units separately. Conductivity is not the same as thermal resistance or insulation R-value.

Understanding Thermal Conductivity Measurement

Convert W/(m·K), mW/(m·K), International Table and thermochemical Btu conductivity units, and thermochemical calorie conductivity units. Btu variants are kept explicit because their joule values differ.

📜History & Context

Early heat-transfer studies developed practical ways to compare how materials conduct heat. The watt, metre, and kelvin provide the coherent SI expression. Building and mechanical engineering also retain Btu-based units, so conversion requires specifying which Btu convention is meant.

✨Fun Facts

  • •Higher thermal conductivity means heat flows more readily for the same temperature gradient and geometry.
  • •The International Table and thermochemical Btu are distinct energy units.
  • •Thermal conductivity is a material property; thermal resistance also depends on thickness and area.

💡Real-World Examples

  • •Compare insulation data published in SI and US customary units.
  • •Convert a metal datasheet value from Btu_IT/(h·ft·°F) to W/(m·K).
  • •Normalize material measurements before comparing them.
  • •Convert a laboratory result reported in cal_th/(cm·s·°C).
  • •Distinguish conductivity from a wall or layer R-value.

🔧Common Applications

  • •Building insulation and construction
  • •Heat exchangers and mechanical design
  • •Materials testing and thermal analysis

❓Frequently Asked Questions

+What is the SI unit for thermal conductivity?

The SI unit is watt per metre-kelvin, written W/(m·K).

+Why does the converter distinguish Btu_IT and Btu_th?

They are different Btu definitions with different energy values, so their conductivity conversion factors are not identical.

+Is thermal conductivity the same as R-value?

No. Conductivity describes a material; thermal resistance also depends on the material layer’s thickness and area.

⭐Popular Thermal Conductivity Conversions

🌡️
W/(m·K) to mW/(m·K)
🌡️
W/(m·K) to Btu_IT/(h·ft·°F)
🌡️
W/(m·K) to Btu_th/(h·ft·°F)
🌡️
W/(m·K) to cal_th/(cm·s·°C)
🌡️
mW/(m·K) to W/(m·K)
🌡️
mW/(m·K) to Btu_IT/(h·ft·°F)
🌡️
mW/(m·K) to Btu_th/(h·ft·°F)
🌡️
mW/(m·K) to cal_th/(cm·s·°C)
🌡️
Btu_IT/(h·ft·°F) to W/(m·K)
🌡️
Btu_IT/(h·ft·°F) to mW/(m·K)

📊
Full Thermal Conductivity Conversion Matrix

Complete list of supported thermal conductivity units for precision conversions.

🌡️Watt per Meter-kelvin(W/(m·K))

→ Milliwatt per Meter-kelvinmW/(m·K)→ Btu (IT) per Hour-foot-°FBtu_IT/(h·ft·°F)→ Btu (thermochemical) per Hour-foot-°FBtu_th/(h·ft·°F)→ Thermochemical Calorie per Centimeter-second-°Ccal_th/(cm·s·°C)

🌡️Milliwatt per Meter-kelvin(mW/(m·K))

→ Watt per Meter-kelvinW/(m·K)→ Btu (IT) per Hour-foot-°FBtu_IT/(h·ft·°F)→ Btu (thermochemical) per Hour-foot-°FBtu_th/(h·ft·°F)→ Thermochemical Calorie per Centimeter-second-°Ccal_th/(cm·s·°C)

🌡️Btu (IT) per Hour-foot-°F(Btu_IT/(h·ft·°F))

→ Watt per Meter-kelvinW/(m·K)→ Milliwatt per Meter-kelvinmW/(m·K)→ Btu (thermochemical) per Hour-foot-°FBtu_th/(h·ft·°F)→ Thermochemical Calorie per Centimeter-second-°Ccal_th/(cm·s·°C)

🌡️Btu (thermochemical) per Hour-foot-°F(Btu_th/(h·ft·°F))

→ Watt per Meter-kelvinW/(m·K)→ Milliwatt per Meter-kelvinmW/(m·K)→ Btu (IT) per Hour-foot-°FBtu_IT/(h·ft·°F)→ Thermochemical Calorie per Centimeter-second-°Ccal_th/(cm·s·°C)

🌡️Thermochemical Calorie per Centimeter-second-°C(cal_th/(cm·s·°C))

→ Watt per Meter-kelvinW/(m·K)→ Milliwatt per Meter-kelvinmW/(m·K)→ Btu (IT) per Hour-foot-°FBtu_IT/(h·ft·°F)→ Btu (thermochemical) per Hour-foot-°FBtu_th/(h·ft·°F)