Convert International table BTU per hour per square inch per degree Fahrenheit to Thermochemical kilocalorie per hour per square metre per degree Celsius
Convert International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°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)/(h·in²·°F) × 703.5400851
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).
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 hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) | Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) |
|---|---|
| 1 BTU(IT)/(h·in²·°F) | 703.54 kcal(th)/(h·m²·°C) |
| 2 BTU(IT)/(h·in²·°F) | 1407.08 kcal(th)/(h·m²·°C) |
| 5 BTU(IT)/(h·in²·°F) | 3517.7 kcal(th)/(h·m²·°C) |
| 10 BTU(IT)/(h·in²·°F) | 7035.4 kcal(th)/(h·m²·°C) |
| 25 BTU(IT)/(h·in²·°F) | 17588.5 kcal(th)/(h·m²·°C) |
| 50 BTU(IT)/(h·in²·°F) | 35177 kcal(th)/(h·m²·°C) |
| 100 BTU(IT)/(h·in²·°F) | 70354 kcal(th)/(h·m²·°C) |