Convert International table BTU per hour per square inch per degree Fahrenheit to Thermochemical calorie per hour per square centimetre per degree Celsius
Convert International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°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·in²·°F) × 70.35400851
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 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 inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) | Thermochemical calorie per hour per square centimetre per degree Celsius (cal(th)/(h·cm²·°C)) |
|---|---|
| 1 BTU(IT)/(h·in²·°F) | 70.354 cal(th)/(h·cm²·°C) |
| 2 BTU(IT)/(h·in²·°F) | 140.708 cal(th)/(h·cm²·°C) |
| 5 BTU(IT)/(h·in²·°F) | 351.77 cal(th)/(h·cm²·°C) |
| 10 BTU(IT)/(h·in²·°F) | 703.54 cal(th)/(h·cm²·°C) |
| 25 BTU(IT)/(h·in²·°F) | 1758.85 cal(th)/(h·cm²·°C) |
| 50 BTU(IT)/(h·in²·°F) | 3517.7 cal(th)/(h·cm²·°C) |
| 100 BTU(IT)/(h·in²·°F) | 7035.4 cal(th)/(h·cm²·°C) |