Convert Celsius Heat Unit per hour per square foot per degree Celsius to International table BTU per hour per square inch per degree Fahrenheit
Convert Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) 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) = CHU/(h·ft²·°C) × 0.006944444444
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).
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
| Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) | International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) |
|---|---|
| 1 CHU/(h·ft²·°C) | 0.00694444 BTU(IT)/(h·in²·°F) |
| 2 CHU/(h·ft²·°C) | 0.0138889 BTU(IT)/(h·in²·°F) |
| 5 CHU/(h·ft²·°C) | 0.0347222 BTU(IT)/(h·in²·°F) |
| 10 CHU/(h·ft²·°C) | 0.0694444 BTU(IT)/(h·in²·°F) |
| 25 CHU/(h·ft²·°C) | 0.173611 BTU(IT)/(h·in²·°F) |
| 50 CHU/(h·ft²·°C) | 0.347222 BTU(IT)/(h·in²·°F) |
| 100 CHU/(h·ft²·°C) | 0.694444 BTU(IT)/(h·in²·°F) |