Convert International table BTU per hour per square foot per degree Fahrenheit to Thermochemical calorie per hour per square centimetre per degree Celsius
Convert International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) to Thermochemical calorie per hour per square centimetre per degree Celsius (cal(th)/(h·cm²·°C)) instantly and accurately.
Conversion Formula
cal(th)/(h·cm²·°C) = BTU(IT)/(h·ft²·°F) × 0.4885695035
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 Thermochemical calorie per hour per square centimetre per degree Celsius
The thermochemical calorie per hour per square centimetre per degree Celsius (cal(th)/(h·cm²·°C)) equals 4.184/0.36 ≈ 11.622 W/(m²·K) (1 cal(th) = 4.184 J; 1 cm² = 10⁻⁴ m²). A CGS-derived unit found in older heat transfer textbooks and chemical engineering publications, especially in Eastern European and Japanese technical literature. 1 cal(th)/(h·cm²·°C) ≈ 11.622 W/(m²·K).
Quick Reference Table
| International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) | Thermochemical calorie per hour per square centimetre per degree Celsius (cal(th)/(h·cm²·°C)) |
|---|---|
| 1 BTU(IT)/(h·ft²·°F) | 0.48857 cal(th)/(h·cm²·°C) |
| 2 BTU(IT)/(h·ft²·°F) | 0.977139 cal(th)/(h·cm²·°C) |
| 5 BTU(IT)/(h·ft²·°F) | 2.44285 cal(th)/(h·cm²·°C) |
| 10 BTU(IT)/(h·ft²·°F) | 4.8857 cal(th)/(h·cm²·°C) |
| 25 BTU(IT)/(h·ft²·°F) | 12.2142 cal(th)/(h·cm²·°C) |
| 50 BTU(IT)/(h·ft²·°F) | 24.4285 cal(th)/(h·cm²·°C) |
| 100 BTU(IT)/(h·ft²·°F) | 48.857 cal(th)/(h·cm²·°C) |