Convert International table BTU per second per square foot per degree Fahrenheit to Thermochemical kilocalorie per hour per square metre per degree Celsius
Convert International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) to Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) instantly and accurately.
Conversion Formula
kcal(th)/(h·m²·°C) = BTU(IT)/(s·ft²·°F) × 17588.50213
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).
About Thermochemical kilocalorie per hour per square metre per degree Celsius
The thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) equals 4184/3600 ≈ 1.1622 W/(m²·K) (1 kcal(th) = 4184 J; 1 °C = 1 K). Widely used in continental European and Soviet-era building physics, HVAC standards, and heat exchanger design manuals where wall U-values were tabulated in this unit. 1 kcal(th)/(h·m²·°C) ≈ 1.1622 W/(m²·K).
Quick Reference Table
| International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) | Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) |
|---|---|
| 1 BTU(IT)/(s·ft²·°F) | 17588.5 kcal(th)/(h·m²·°C) |
| 2 BTU(IT)/(s·ft²·°F) | 35177 kcal(th)/(h·m²·°C) |
| 5 BTU(IT)/(s·ft²·°F) | 87942.5 kcal(th)/(h·m²·°C) |
| 10 BTU(IT)/(s·ft²·°F) | 175885 kcal(th)/(h·m²·°C) |
| 25 BTU(IT)/(s·ft²·°F) | 439713 kcal(th)/(h·m²·°C) |
| 50 BTU(IT)/(s·ft²·°F) | 879425 kcal(th)/(h·m²·°C) |
| 100 BTU(IT)/(s·ft²·°F) | 1758850 kcal(th)/(h·m²·°C) |