Convert Thermochemical kilocalorie per hour per square metre per degree Celsius to International table BTU per hour per square inch per degree Fahrenheit
Convert Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°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) = kcal(th)/(h·m²·°C) × 0.001421383118
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 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
| Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) | International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) |
|---|---|
| 1 kcal(th)/(h·m²·°C) | 0.00142138 BTU(IT)/(h·in²·°F) |
| 2 kcal(th)/(h·m²·°C) | 0.00284277 BTU(IT)/(h·in²·°F) |
| 5 kcal(th)/(h·m²·°C) | 0.00710692 BTU(IT)/(h·in²·°F) |
| 10 kcal(th)/(h·m²·°C) | 0.0142138 BTU(IT)/(h·in²·°F) |
| 25 kcal(th)/(h·m²·°C) | 0.0355346 BTU(IT)/(h·in²·°F) |
| 50 kcal(th)/(h·m²·°C) | 0.0710692 BTU(IT)/(h·in²·°F) |
| 100 kcal(th)/(h·m²·°C) | 0.142138 BTU(IT)/(h·in²·°F) |