Convert Watt per Square Meter Kelvin to IT BTU per Hour Square Foot Degree Fahrenheit
Live bidirectional calculator for Watts per Square Meter Kelvin (W/(m²·K)) and IT BTUs per Hour Square Foot Degree Fahrenheit (Btu_IT/(h·ft²·°F)) with verified formula and conversion charts.
Heat Transfer Coefficient6 units
How the Calculation Works (Linear Scaling)
Since 1 IT BTU per Hour Square Foot Degree Fahrenheit = 5.678263 Watts per Square Meter Kelvin, divide the value in Watts per Square Meter Kelvin by 5.678263.
Watt per Square Meter Kelvin to IT BTU per Hour Square Foot Degree Fahrenheit Conversion Table
Precomputed values for quick reference and printing.
| Watt per Square Meter Kelvin | IT BTU per Hour Square Foot Degree Fahrenheit |
|---|---|
| 1 W/(m²·K) | 0.1761 Btu_IT/(h·ft²·°F) |
| 2 W/(m²·K) | 0.3522 Btu_IT/(h·ft²·°F) |
| 3 W/(m²·K) | 0.5283 Btu_IT/(h·ft²·°F) |
| 4 W/(m²·K) | 0.7044 Btu_IT/(h·ft²·°F) |
| 5 W/(m²·K) | 0.8806 Btu_IT/(h·ft²·°F) |
| 6 W/(m²·K) | 1.0567 Btu_IT/(h·ft²·°F) |
| 7 W/(m²·K) | 1.2328 Btu_IT/(h·ft²·°F) |
| 8 W/(m²·K) | 1.4089 Btu_IT/(h·ft²·°F) |
| 9 W/(m²·K) | 1.585 Btu_IT/(h·ft²·°F) |
| 10 W/(m²·K) | 1.7611 Btu_IT/(h·ft²·°F) |
| 15 W/(m²·K) | 2.6417 Btu_IT/(h·ft²·°F) |
| 20 W/(m²·K) | 3.5222 Btu_IT/(h·ft²·°F) |
| 25 W/(m²·K) | 4.4028 Btu_IT/(h·ft²·°F) |
| 30 W/(m²·K) | 5.2833 Btu_IT/(h·ft²·°F) |
| 40 W/(m²·K) | 7.0444 Btu_IT/(h·ft²·°F) |
| 50 W/(m²·K) | 8.8055 Btu_IT/(h·ft²·°F) |
| 75 W/(m²·K) | 13.2083 Btu_IT/(h·ft²·°F) |
| 100 W/(m²·K) | 17.611 Btu_IT/(h·ft²·°F) |
| IT BTU per Hour Square Foot Degree Fahrenheit | Watt per Square Meter Kelvin |
|---|---|
| 1 Btu_IT/(h·ft²·°F) | 5.6783 W/(m²·K) |
| 2 Btu_IT/(h·ft²·°F) | 11.3565 W/(m²·K) |
| 3 Btu_IT/(h·ft²·°F) | 17.0348 W/(m²·K) |
| 4 Btu_IT/(h·ft²·°F) | 22.7131 W/(m²·K) |
| 5 Btu_IT/(h·ft²·°F) | 28.3913 W/(m²·K) |
| 6 Btu_IT/(h·ft²·°F) | 34.0696 W/(m²·K) |
| 7 Btu_IT/(h·ft²·°F) | 39.7478 W/(m²·K) |
| 8 Btu_IT/(h·ft²·°F) | 45.4261 W/(m²·K) |
| 9 Btu_IT/(h·ft²·°F) | 51.1044 W/(m²·K) |
| 10 Btu_IT/(h·ft²·°F) | 56.7826 W/(m²·K) |
| 15 Btu_IT/(h·ft²·°F) | 85.174 W/(m²·K) |
| 20 Btu_IT/(h·ft²·°F) | 113.5653 W/(m²·K) |
| 25 Btu_IT/(h·ft²·°F) | 141.9566 W/(m²·K) |
| 30 Btu_IT/(h·ft²·°F) | 170.3479 W/(m²·K) |
| 40 Btu_IT/(h·ft²·°F) | 227.1305 W/(m²·K) |
| 50 Btu_IT/(h·ft²·°F) | 283.9132 W/(m²·K) |
| 75 Btu_IT/(h·ft²·°F) | 425.8698 W/(m²·K) |
| 100 Btu_IT/(h·ft²·°F) | 567.8263 W/(m²·K) |
About Watt per Square Meter Kelvin (W/(m²·K))
The SI unit of convective heat transfer coefficient (h) and overall thermal transmittance (U-factor), defined as the thermal power in watts conducted per square meter of surface per kelvin temperature difference.
History: Formulated in Newton’s law of cooling (q" = h ΔT) and standardized in international building energy codes.
Common Uses: Building window and wall U-values, heat exchanger design, convective cooling calculations.
About IT BTU per Hour Square Foot Degree Fahrenheit (Btu_IT/(h·ft²·°F))
The standard US customary unit of heat transfer coefficient and architectural U-factor, equal to ≈ 5.678263 W/(m²·K).
History: Standardized by ASHRAE and NFRC for North American fenestration and insulation ratings.
Common Uses: NFRC window energy ratings, ASHRAE 90.1 building envelope U-factors, HVAC heat exchanger sizing.
❓ Frequently Asked Questions
How many IT BTUs per Hour Square Foot Degree Fahrenheit are in 1 Watt per Square Meter Kelvin?
There are exactly 0.17611 IT BTUs per Hour Square Foot Degree Fahrenheit in 1 Watt per Square Meter Kelvin (1 W/(m²·K) = 0.17611 Btu_IT/(h·ft²·°F)).
What is the formula to convert Watt per Square Meter Kelvin to IT BTU per Hour Square Foot Degree Fahrenheit?
The formula is: IT BTU per Hour Square Foot Degree Fahrenheit = Watt per Square Meter Kelvin / 5.678263. Since 1 IT BTU per Hour Square Foot Degree Fahrenheit = 5.678263 Watts per Square Meter Kelvin, divide the value in Watts per Square Meter Kelvin by 5.678263.
How do I convert 1 W/(m²·K) to Btu_IT/(h·ft²·°F) manually?
To convert 1 W/(m²·K) to Btu_IT/(h·ft²·°F): apply the formula IT BTU per Hour Square Foot Degree Fahrenheit = Watt per Square Meter Kelvin / 5.678263. Substituting gives: 1 / 5.678263 = 0.1761 Btu_IT/(h·ft²·°F).