BTU per hour square foot degree Fahrenheit (BTU/(h·ft²·°F))
US unit of heat transfer coefficient and U-value, based on the BTU (IT).
What is a BTU per hour square foot degree Fahrenheit?
- Symbol
- BTU/(h·ft²·°F)
- Quantity
- Heat Transfer Coefficient
- Unit system
- US customary
- Definition
- US unit of heat transfer coefficient and U-value, based on the BTU (IT).
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used for U-factors on US window labels and in US HVAC and heat exchanger calculations.
BTU per hour square foot degree Fahrenheit in other heat transfer coefficient units
- 1 BTU/(h·ft²·°F) ≈ 5.678263341 W/(m²·K)BTU per hour square foot degree Fahrenheit to Watt per square meter kelvin converter
- 1 BTU/(h·ft²·°F) ≈ 0.005678263341 kW/(m²·K)Kilowatt per square meter kelvin
- 1 BTU/(h·ft²·°F) ≈ 4.882427636 kcal/(h·m²·°C)Kilocalorie (IT) per hour square meter degree Celsius
- 1 BTU/(h·ft²·°F) ≈ 0.000135713751 cal/(s·cm²·°C)Calorie (thermochemical) per second square centimeter degree Celsius
BTU per hour square foot degree Fahrenheit quick reference
| BTU per hour square foot degree Fahrenheit | Watt per square meter kelvin | Kilowatt per square meter kelvin | Kilocalorie (IT) per hour square meter degree Celsius |
|---|---|---|---|
| 1 BTU/(h·ft²·°F) | ≈ 5.678263341 W/(m²·K) | ≈ 0.005678263341 kW/(m²·K) | ≈ 4.882427636 kcal/(h·m²·°C) |
| 10 BTU/(h·ft²·°F) | ≈ 56.78263341 W/(m²·K) | ≈ 0.05678263341 kW/(m²·K) | ≈ 48.82427636 kcal/(h·m²·°C) |
| 100 BTU/(h·ft²·°F) | ≈ 567.8263341 W/(m²·K) | ≈ 0.5678263341 kW/(m²·K) | ≈ 488.2427636 kcal/(h·m²·°C) |
| 1000 BTU/(h·ft²·°F) | ≈ 5678.263341 W/(m²·K) | ≈ 5.678263341 kW/(m²·K) | ≈ 4882.427636 kcal/(h·m²·°C) |
Where the BTU per hour square foot degree Fahrenheit fits
The next smaller heat transfer coefficient unit is the kilocalorie (IT) per hour square meter degree Celsius (kcal/(h·m²·°C)). 1 BTU/(h·ft²·°F) ≈ 4.882427636 kcal/(h·m²·°C), and 1 kcal/(h·m²·°C) ≈ 0.2048161436 BTU/(h·ft²·°F).
The next larger heat transfer coefficient unit is the kilowatt per square meter kelvin (kW/(m²·K)). 1 BTU/(h·ft²·°F) ≈ 0.005678263341 kW/(m²·K), and 1 kW/(m²·K) ≈ 176.1101837 BTU/(h·ft²·°F).
Frequently asked questions
- How many watts per square meter kelvin are in one BTU per hour square foot degree Fahrenheit?
- One BTU per hour square foot degree Fahrenheit ≈ 5.678263341 W/(m²·K) (watts per square meter kelvin).
- How many kilowatts per square meter kelvin are in one BTU per hour square foot degree Fahrenheit?
- One BTU per hour square foot degree Fahrenheit ≈ 0.005678263341 kW/(m²·K) (kilowatts per square meter kelvin).
- How many kilocalories (IT) per hour square meter degree Celsius are in one BTU per hour square foot degree Fahrenheit?
- One BTU per hour square foot degree Fahrenheit ≈ 4.882427636 kcal/(h·m²·°C) (kilocalories (IT) per hour square meter degree Celsius).