Heat Transfer Coefficient Converter
Heat Transfer Coefficient Converter: convert between 6 heat transfer coefficient units, for example 1 BTU/(h·ft²·°F) = 5.678263341 W/(m²·K).
From unit
To unit
1 BTU/(h·ft²·°F) = 5.678263341 W/(m²·K)
| Unit | Value |
|---|---|
| BTU per hour square foot degree Fahrenheit to watt per square metre kelvin | 5.678263341 W/(m²·K) |
| BTU per hour square foot degree Fahrenheit to kilowatt per square metre kelvin | 0.005678263341 kW/(m²·K) |
| BTU per hour square foot degree Fahrenheit to watt per square centimetre kelvin | 0.0005678263341 W/(cm²·K) |
| BTU per hour square foot degree Fahrenheit (BTU/(h·ft²·°F)) | 1 BTU/(h·ft²·°F) |
| BTU per hour square foot degree Fahrenheit to kilocalorie per hour square metre degree Celsius | 4.882427636 kcal/(h·m²·°C) |
| BTU per hour square foot degree Fahrenheit to calorie per second square centimetre degree Celsius | 0.000135713751 cal/(s·cm²·°C) |
Convert heat transfer coefficients and U-values between W/(m²·K), kW/(m²·K), W/(cm²·K), BTU/(h·ft²·°F), kcal/(h·m²·°C) and cal/(s·cm²·°C). 1 BTU/(h·ft²·°F) = 5.678263341 W/(m²·K) exactly.
U-value and R-value
A U-value is an overall heat transfer coefficient. Its reciprocal is the thermal resistance (R-value): R = 1/U. A US R-value in h·ft²·°F/BTU is 0.1761 m²·K/W, so R-19 insulation is about RSI 3.35.
Heat Transfer Coefficient unit definitions
- watt per square metre kelvin (W/(m²·K))
- The watt per square metre kelvin is the SI unit of the heat transfer coefficient h and the overall coefficient (U-value): heat flow per square metre for each kelvin of temperature difference. Free convection in air is about 5–25 W/(m²·K).
- BTU per hour square foot degree Fahrenheit (BTU/(h·ft²·°F))
- The BTU per hour square foot degree Fahrenheit is the US unit of heat transfer coefficient and U-factor, exactly 5.678263341 W/(m²·K). A double-glazed window has a U-factor of about 0.3–0.5.
- kilowatt per square metre kelvin (kW/(m²·K))
- The kilowatt per square metre kelvin is 1000 W/(m²·K), convenient for boiling, condensation and liquid heat exchangers where h reaches thousands of W/(m²·K).
- kilocalorie per hour square metre degree Celsius (kcal/(h·m²·°C))
- The kilocalorie per hour square metre degree Celsius is an older metric unit of heat transfer coefficient, exactly 1.163 W/(m²·K) with the International Table kilocalorie. Reference: International Table kilocalorie (4186.8 J), as used in engineering heat transfer data
- watt per square centimetre kelvin (W/(cm²·K))
- The watt per square centimetre kelvin is 10 000 W/(m²·K). Electronics cooling and thermal interface data sometimes use it.
- calorie per second square centimetre degree Celsius (cal/(s·cm²·°C))
- The calorie per second square centimetre degree Celsius is the CGS unit of heat transfer coefficient, 41 840 W/(m²·K) with the thermochemical calorie. Reference: Thermochemical calorie (4.184 J)
Popular heat transfer coefficient conversions
- watt per square metre kelvin to BTU per hour square foot degree Fahrenheit
- watt per square metre kelvin to kilocalorie per hour square metre degree Celsius
- BTU per hour square foot degree Fahrenheit to watt per square metre kelvin
- kilocalorie per hour square metre degree Celsius to watt per square metre kelvin
Show all 30 heat transfer coefficient conversions
From watts per square metre kelvin
- watt per square metre kelvin to kilowatt per square metre kelvin
- watt per square metre kelvin to watt per square centimetre kelvin
- watt per square metre kelvin to BTU per hour square foot degree Fahrenheit
- watt per square metre kelvin to kilocalorie per hour square metre degree Celsius
- watt per square metre kelvin to calorie per second square centimetre degree Celsius
From kilowatts per square metre kelvin
- kilowatt per square metre kelvin to watt per square metre kelvin
- kilowatt per square metre kelvin to watt per square centimetre kelvin
- kilowatt per square metre kelvin to BTU per hour square foot degree Fahrenheit
- kilowatt per square metre kelvin to kilocalorie per hour square metre degree Celsius
- kilowatt per square metre kelvin to calorie per second square centimetre degree Celsius
From watts per square centimetre kelvin
- watt per square centimetre kelvin to watt per square metre kelvin
- watt per square centimetre kelvin to kilowatt per square metre kelvin
- watt per square centimetre kelvin to BTU per hour square foot degree Fahrenheit
- watt per square centimetre kelvin to kilocalorie per hour square metre degree Celsius
- watt per square centimetre kelvin to calorie per second square centimetre degree Celsius
From BTU per hour square foot degree Fahrenheit
- BTU per hour square foot degree Fahrenheit to watt per square metre kelvin
- BTU per hour square foot degree Fahrenheit to kilowatt per square metre kelvin
- BTU per hour square foot degree Fahrenheit to watt per square centimetre kelvin
- BTU per hour square foot degree Fahrenheit to kilocalorie per hour square metre degree Celsius
- BTU per hour square foot degree Fahrenheit to calorie per second square centimetre degree Celsius
From kilocalories per hour square metre degree Celsius
- kilocalorie per hour square metre degree Celsius to watt per square metre kelvin
- kilocalorie per hour square metre degree Celsius to kilowatt per square metre kelvin
- kilocalorie per hour square metre degree Celsius to watt per square centimetre kelvin
- kilocalorie per hour square metre degree Celsius to BTU per hour square foot degree Fahrenheit
- kilocalorie per hour square metre degree Celsius to calorie per second square centimetre degree Celsius
From calories per second square centimetre degree Celsius
- calorie per second square centimetre degree Celsius to watt per square metre kelvin
- calorie per second square centimetre degree Celsius to kilowatt per square metre kelvin
- calorie per second square centimetre degree Celsius to watt per square centimetre kelvin
- calorie per second square centimetre degree Celsius to BTU per hour square foot degree Fahrenheit
- calorie per second square centimetre degree Celsius to kilocalorie per hour square metre degree Celsius
Related converters
- Thermal Conductivity Converter – W/(m·K), mW/(m·K), BTU/(h·ft·°F), k-value, kcal/(h·m·°C)
- Temperature Converter – °C, °F, K, °R
- Power Converter – W, kW, MW, hp, PS, BTU/h, TR, kcal/h
- Area Converter – m², cm², mm², ft², in², test areas
- Printable heat transfer coefficient conversion chart – print, PDF or PNG
- thermal conductivity (k, λ) converter
- watts to BTU/h (heat flow)
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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: .