Convert Celsius Heat Unit per hour per square foot per degree Celsius to International table BTU per second per square foot per degree Fahrenheit
Convert Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) 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) = CHU/(h·ft²·°C) × 0.0002777777778
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 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
| Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) | International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) |
|---|---|
| 1 CHU/(h·ft²·°C) | 0.000277778 BTU(IT)/(s·ft²·°F) |
| 2 CHU/(h·ft²·°C) | 0.000555556 BTU(IT)/(s·ft²·°F) |
| 5 CHU/(h·ft²·°C) | 0.00138889 BTU(IT)/(s·ft²·°F) |
| 10 CHU/(h·ft²·°C) | 0.00277778 BTU(IT)/(s·ft²·°F) |
| 25 CHU/(h·ft²·°C) | 0.00694444 BTU(IT)/(s·ft²·°F) |
| 50 CHU/(h·ft²·°C) | 0.0138889 BTU(IT)/(s·ft²·°F) |
| 100 CHU/(h·ft²·°C) | 0.0277778 BTU(IT)/(s·ft²·°F) |