Convert Thermochemical kilocalorie per hour per square metre per degree Celsius to International table BTU per second per square foot per degree Fahrenheit
Convert Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°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) = kcal(th)/(h·m²·°C) × 5.685532473e-5
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).
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
| Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) | International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) |
|---|---|
| 1 kcal(th)/(h·m²·°C) | 5.686 × 10-5 BTU(IT)/(s·ft²·°F) |
| 2 kcal(th)/(h·m²·°C) | 0.000113711 BTU(IT)/(s·ft²·°F) |
| 5 kcal(th)/(h·m²·°C) | 0.000284277 BTU(IT)/(s·ft²·°F) |
| 10 kcal(th)/(h·m²·°C) | 0.000568553 BTU(IT)/(s·ft²·°F) |
| 25 kcal(th)/(h·m²·°C) | 0.00142138 BTU(IT)/(s·ft²·°F) |
| 50 kcal(th)/(h·m²·°C) | 0.00284277 BTU(IT)/(s·ft²·°F) |
| 100 kcal(th)/(h·m²·°C) | 0.00568553 BTU(IT)/(s·ft²·°F) |