Convert International table BTU per hour per square inch per degree Fahrenheit to Celsius Heat Unit per hour per square foot per degree Celsius
Convert International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) to Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) instantly and accurately.
Conversion Formula
CHU/(h·ft²·°C) = BTU(IT)/(h·in²·°F) × 144
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).
About Celsius Heat Unit per hour per square foot per degree Celsius
The Celsius heat unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) equals ≈ 5.6783 W/(m²·K) - numerically identical to BTU(IT)/(h·ft²·°F). Used in UK and Canadian steam and process engineering; the temperature-interval ratio °F/°C = 5/9 is exactly compensated by the energy ratio CHU/BTU(IT) = 9/5, making both units numerically equal. 1 CHU/(h·ft²·°C) = 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
Quick Reference Table
| International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) | Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) |
|---|---|
| 1 BTU(IT)/(h·in²·°F) | 144 CHU/(h·ft²·°C) |
| 2 BTU(IT)/(h·in²·°F) | 288 CHU/(h·ft²·°C) |
| 5 BTU(IT)/(h·in²·°F) | 720 CHU/(h·ft²·°C) |
| 10 BTU(IT)/(h·in²·°F) | 1440 CHU/(h·ft²·°C) |
| 25 BTU(IT)/(h·in²·°F) | 3600 CHU/(h·ft²·°C) |
| 50 BTU(IT)/(h·in²·°F) | 7200 CHU/(h·ft²·°C) |
| 100 BTU(IT)/(h·in²·°F) | 14400 CHU/(h·ft²·°C) |