Convert International table BTU per hour per square foot per degree Fahrenheit to International table BTU per hour per square inch 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 hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·in²·°F) = BTU(IT)/(h·ft²·°F) × 0.006944444444
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 hour per square inch per degree Fahrenheit
The international table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) equals ≈ 817.67 W/(m²·K) (1 in² = 6.4516×10⁻⁴ m²; 1 °F = 5/9 K). Encountered in US electronics thermal management, semiconductor package datasheets, and heat sink characterisation where contact areas are measured in square inches. 1 BTU(IT)/(h·in²·°F) ≈ 817.67 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 hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) |
|---|---|
| 1 BTU(IT)/(h·ft²·°F) | 0.00694444 BTU(IT)/(h·in²·°F) |
| 2 BTU(IT)/(h·ft²·°F) | 0.0138889 BTU(IT)/(h·in²·°F) |
| 5 BTU(IT)/(h·ft²·°F) | 0.0347222 BTU(IT)/(h·in²·°F) |
| 10 BTU(IT)/(h·ft²·°F) | 0.0694444 BTU(IT)/(h·in²·°F) |
| 25 BTU(IT)/(h·ft²·°F) | 0.173611 BTU(IT)/(h·in²·°F) |
| 50 BTU(IT)/(h·ft²·°F) | 0.347222 BTU(IT)/(h·in²·°F) |
| 100 BTU(IT)/(h·ft²·°F) | 0.694444 BTU(IT)/(h·in²·°F) |