Thermal Conductivity Converter
Thermal Conductivity Converter: convert between 7 thermal conductivity units, for example 1 BTU/(h·ft·°F) = 1.730734666 W/(m·K).
From unit
To unit
1 BTU/(h·ft·°F) = 1.730734666 W/(m·K)
| Unit | Value |
|---|---|
| BTU per hour foot degree Fahrenheit to watt per metre kelvin | 1.730734666 W/(m·K) |
| BTU per hour foot degree Fahrenheit to milliwatt per metre kelvin | 1730.734666 mW/(m·K) |
| BTU per hour foot degree Fahrenheit to watt per centimetre kelvin | 0.01730734666 W/(cm·K) |
| BTU per hour foot degree Fahrenheit (BTU/(h·ft·°F)) | 1 BTU/(h·ft·°F) |
| BTU per hour foot degree Fahrenheit to BTU inch per hour square foot degree Fahrenheit | 12 BTU·in/(h·ft²·°F) |
| BTU per hour foot degree Fahrenheit to kilocalorie per hour metre degree Celsius | 1.488163944 kcal/(h·m·°C) |
| BTU per hour foot degree Fahrenheit to calorie per second centimetre degree Celsius | 0.00413655513 cal/(s·cm·°C) |
Convert thermal conductivity between W/(m·K), mW/(m·K), W/(cm·K), BTU/(h·ft·°F), BTU·in/(h·ft²·°F), kcal/(h·m·°C) and cal/(s·cm·°C). All factors are exact: 1 BTU/(h·ft·°F) = 1.730734666 W/(m·K).
Two US units: per foot and per inch
BTU/(h·ft·°F) is used in heat transfer texts; BTU·in/(h·ft²·°F) is the insulation "k-value" (thickness in inches). They differ by a factor of 12: 1 BTU/(h·ft·°F) = 12 BTU·in/(h·ft²·°F).
Conductivity, U-value and R-value
Thermal conductivity k is a material property. A layer of thickness L has a thermal resistance R = L/k and transmittance U = k/L, which is a heat transfer coefficient in W/(m²·K).
Thermal Conductivity unit definitions
- watt per metre kelvin (W/(m·K))
- The watt per metre kelvin is the SI unit of thermal conductivity (k or λ): the heat flow through 1 m² of a 1 m thick layer for each kelvin of temperature difference. Copper is about 400 W/(m·K), mineral wool about 0.035.
- BTU per hour foot degree Fahrenheit (BTU/(h·ft·°F))
- The BTU per hour foot degree Fahrenheit is the US customary unit of thermal conductivity, exactly 1.730734666 W/(m·K). Carbon steel is about 26–30, copper about 230 BTU/(h·ft·°F).
- BTU inch per hour square foot degree Fahrenheit (BTU·in/(h·ft²·°F))
- The BTU inch per hour square foot degree Fahrenheit is the US "k-value" unit for insulation: the heat flow through one inch of material. 1 BTU·in/(h·ft²·°F) = 0.1442 W/(m·K); fibreglass is about 0.25–0.27.
- milliwatt per metre kelvin (mW/(m·K))
- The milliwatt per metre kelvin is 0.001 W/(m·K). Insulation manufacturers use it for low conductivities: PIR boards about 22, mineral wool 32–40, still air about 26 mW/(m·K).
- kilocalorie per hour metre degree Celsius (kcal/(h·m·°C))
- The kilocalorie per hour metre degree Celsius is an older metric engineering unit, exactly 1.163 W/(m·K) with the International Table kilocalorie. It still appears in Asian, Russian and older European tables. Reference: International Table kilocalorie (4186.8 J), as used in engineering heat transfer data
- watt per centimetre kelvin (W/(cm·K))
- The watt per centimetre kelvin is 100 W/(m·K). Physics and semiconductor references use it: silicon is about 1.5 W/(cm·K) and copper about 4 W/(cm·K).
Show 1 more units
- calorie per second centimetre degree Celsius (cal/(s·cm·°C))
- The calorie per second centimetre degree Celsius is the CGS unit of thermal conductivity, 418.4 W/(m·K) with the thermochemical calorie. Older chemistry and geology literature uses it. Reference: Thermochemical calorie (4.184 J)
Popular thermal conductivity conversions
- watt per metre kelvin to BTU per hour foot degree Fahrenheit
- watt per metre kelvin to BTU inch per hour square foot degree Fahrenheit
- milliwatt per metre kelvin to watt per metre kelvin
- BTU per hour foot degree Fahrenheit to watt per metre kelvin
- BTU inch per hour square foot degree Fahrenheit to watt per metre kelvin
- kilocalorie per hour metre degree Celsius to watt per metre kelvin
Show all 42 thermal conductivity conversions
From watts per metre kelvin
- watt per metre kelvin to milliwatt per metre kelvin
- watt per metre kelvin to watt per centimetre kelvin
- watt per metre kelvin to BTU per hour foot degree Fahrenheit
- watt per metre kelvin to BTU inch per hour square foot degree Fahrenheit
- watt per metre kelvin to kilocalorie per hour metre degree Celsius
- watt per metre kelvin to calorie per second centimetre degree Celsius
From milliwatts per metre kelvin
- milliwatt per metre kelvin to watt per metre kelvin
- milliwatt per metre kelvin to watt per centimetre kelvin
- milliwatt per metre kelvin to BTU per hour foot degree Fahrenheit
- milliwatt per metre kelvin to BTU inch per hour square foot degree Fahrenheit
- milliwatt per metre kelvin to kilocalorie per hour metre degree Celsius
- milliwatt per metre kelvin to calorie per second centimetre degree Celsius
From watts per centimetre kelvin
- watt per centimetre kelvin to watt per metre kelvin
- watt per centimetre kelvin to milliwatt per metre kelvin
- watt per centimetre kelvin to BTU per hour foot degree Fahrenheit
- watt per centimetre kelvin to BTU inch per hour square foot degree Fahrenheit
- watt per centimetre kelvin to kilocalorie per hour metre degree Celsius
- watt per centimetre kelvin to calorie per second centimetre degree Celsius
From BTU per hour foot degree Fahrenheit
- BTU per hour foot degree Fahrenheit to watt per metre kelvin
- BTU per hour foot degree Fahrenheit to milliwatt per metre kelvin
- BTU per hour foot degree Fahrenheit to watt per centimetre kelvin
- BTU per hour foot degree Fahrenheit to BTU inch per hour square foot degree Fahrenheit
- BTU per hour foot degree Fahrenheit to kilocalorie per hour metre degree Celsius
- BTU per hour foot degree Fahrenheit to calorie per second centimetre degree Celsius
From BTU inch per hour square foot degree Fahrenheit
- BTU inch per hour square foot degree Fahrenheit to watt per metre kelvin
- BTU inch per hour square foot degree Fahrenheit to milliwatt per metre kelvin
- BTU inch per hour square foot degree Fahrenheit to watt per centimetre kelvin
- BTU inch per hour square foot degree Fahrenheit to BTU per hour foot degree Fahrenheit
- BTU inch per hour square foot degree Fahrenheit to kilocalorie per hour metre degree Celsius
- BTU inch per hour square foot degree Fahrenheit to calorie per second centimetre degree Celsius
From kilocalories per hour metre degree Celsius
- kilocalorie per hour metre degree Celsius to watt per metre kelvin
- kilocalorie per hour metre degree Celsius to milliwatt per metre kelvin
- kilocalorie per hour metre degree Celsius to watt per centimetre kelvin
- kilocalorie per hour metre degree Celsius to BTU per hour foot degree Fahrenheit
- kilocalorie per hour metre degree Celsius to BTU inch per hour square foot degree Fahrenheit
- kilocalorie per hour metre degree Celsius to calorie per second centimetre degree Celsius
From calories per second centimetre degree Celsius
- calorie per second centimetre degree Celsius to watt per metre kelvin
- calorie per second centimetre degree Celsius to milliwatt per metre kelvin
- calorie per second centimetre degree Celsius to watt per centimetre kelvin
- calorie per second centimetre degree Celsius to BTU per hour foot degree Fahrenheit
- calorie per second centimetre degree Celsius to BTU inch per hour square foot degree Fahrenheit
- calorie per second centimetre degree Celsius to kilocalorie per hour metre degree Celsius
Related converters
- Heat Transfer Coefficient Converter – W/(m²·K), BTU/(h·ft²·°F), kcal/(h·m²·°C), U-value
- Thermal Expansion Coefficient Converter – 1/K, 1/°C, 1/°F, ppm/K, ppm/°F
- Temperature Converter – °C, °F, K, °R
- Power Converter – W, kW, MW, hp, PS, BTU/h, TR, kcal/h
- Printable thermal conductivity conversion chart – print, PDF or PNG
- heat transfer coefficient (U-value) converter
- watts to BTU/h (heat flow)
Add this thermal conductivity converter to your site
Free for blogs, labs, schools and company intranets. Paste this code into your page; the converter stays up to date and the credit line must remain visible.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology.
Last reviewed: .