BTU inch per hour square foot degree Fahrenheit (BTU·in/(h·ft²·°F))
US unit of thermal conductivity used for insulation materials (the "k-value").
What is a BTU inch per hour square foot degree Fahrenheit?
- Symbol
- BTU·in/(h·ft²·°F)
- Quantity
- Thermal Conductivity
- Unit system
- US customary
- Definition
- US unit of thermal conductivity used for insulation materials (the "k-value").
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
The "k-value" on US insulation data sheets. Dividing thickness in inches by it gives the R-value.
BTU inch per hour square foot degree Fahrenheit in other thermal conductivity units
- 1 BTU·in/(h·ft²·°F) ≈ 0.1442278889 W/(m·K)BTU inch per hour square foot degree Fahrenheit to Watt per meter kelvin converter
- 1 BTU·in/(h·ft²·°F) ≈ 0.001442278889 W/(cm·K)Watt per centimeter kelvin
- 1 BTU·in/(h·ft²·°F) ≈ 0.08333333333 BTU/(h·ft·°F)BTU per hour foot degree Fahrenheit
- 1 BTU·in/(h·ft²·°F) ≈ 0.124013662 kcal/(h·m·°C)Kilocalorie (IT) per hour meter degree Celsius
- 1 BTU·in/(h·ft²·°F) ≈ 0.0003447129275 cal/(s·cm·°C)Calorie (thermochemical) per second centimeter degree Celsius
BTU inch per hour square foot degree Fahrenheit quick reference
| BTU inch per hour square foot degree Fahrenheit | Watt per meter kelvin | BTU per hour foot degree Fahrenheit | Watt per centimeter kelvin |
|---|---|---|---|
| 1 BTU·in/(h·ft²·°F) | ≈ 0.1442278889 W/(m·K) | ≈ 0.08333333333 BTU/(h·ft·°F) | ≈ 0.001442278889 W/(cm·K) |
| 10 BTU·in/(h·ft²·°F) | ≈ 1.442278889 W/(m·K) | ≈ 0.8333333333 BTU/(h·ft·°F) | ≈ 0.01442278889 W/(cm·K) |
| 100 BTU·in/(h·ft²·°F) | ≈ 14.42278889 W/(m·K) | ≈ 8.333333333 BTU/(h·ft·°F) | ≈ 0.1442278889 W/(cm·K) |
| 1000 BTU·in/(h·ft²·°F) | ≈ 144.2278889 W/(m·K) | ≈ 83.33333333 BTU/(h·ft·°F) | ≈ 1.442278889 W/(cm·K) |
Where the BTU inch per hour square foot degree Fahrenheit fits
The next larger thermal conductivity unit is the watt per meter kelvin (W/(m·K)). 1 BTU·in/(h·ft²·°F) ≈ 0.1442278889 W/(m·K), and 1 W/(m·K) ≈ 6.933471799 BTU·in/(h·ft²·°F).
Frequently asked questions
- How many watts per meter kelvin are in one BTU inch per hour square foot degree Fahrenheit?
- One BTU inch per hour square foot degree Fahrenheit ≈ 0.1442278889 W/(m·K) (watts per meter kelvin).
- How many BTUs per hour foot degree Fahrenheit are in one BTU inch per hour square foot degree Fahrenheit?
- One BTU inch per hour square foot degree Fahrenheit ≈ 0.08333333333 BTU/(h·ft·°F) (BTUs per hour foot degree Fahrenheit).
- How many watts per centimeter kelvin are in one BTU inch per hour square foot degree Fahrenheit?
- One BTU inch per hour square foot degree Fahrenheit ≈ 0.001442278889 W/(cm·K) (watts per centimeter kelvin).