Convert International table BTU per hour per square foot per degree Fahrenheit to International table BTU per second per square foot per degree Fahrenheit
Convert International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) to International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(s·ft²·°F) = BTU(IT)/(h·ft²·°F) × 0.0002777777778
About International table BTU per hour per square foot per degree Fahrenheit
The international table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) equals 1055.05585262/(3600×0.09290304×5/9) ≈ 5.6783 W/(m²·K). The dominant heat transfer coefficient unit in US engineering: ASHRAE handbooks, ASTM standards, boiler and heat exchanger design, and building envelope U-values are all commonly tabulated in this unit. 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
About International table BTU per second per square foot per degree Fahrenheit
The international table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) equals ≈ 20442 W/(m²·K) (= 3600 × BTU(IT)/(h·ft²·°F)). Encountered in atmospheric re-entry aerodynamic heating analysis, solid rocket motor nozzle throat design, and nuclear reactor thermal-hydraulics with peak surface heat transfer rates. 1 BTU(IT)/(s·ft²·°F) ≈ 20442 W/(m²·K).
Quick Reference Table
| International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) | International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) |
|---|---|
| 1 BTU(IT)/(h·ft²·°F) | 0.000277778 BTU(IT)/(s·ft²·°F) |
| 2 BTU(IT)/(h·ft²·°F) | 0.000555556 BTU(IT)/(s·ft²·°F) |
| 5 BTU(IT)/(h·ft²·°F) | 0.00138889 BTU(IT)/(s·ft²·°F) |
| 10 BTU(IT)/(h·ft²·°F) | 0.00277778 BTU(IT)/(s·ft²·°F) |
| 25 BTU(IT)/(h·ft²·°F) | 0.00694444 BTU(IT)/(s·ft²·°F) |
| 50 BTU(IT)/(h·ft²·°F) | 0.0138889 BTU(IT)/(s·ft²·°F) |
| 100 BTU(IT)/(h·ft²·°F) | 0.0277778 BTU(IT)/(s·ft²·°F) |