Convert Thermochemical kilocalorie per hour per square metre to International table BTU per hour per square inch
Convert Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) to International table BTU per hour per square inch (BTU(IT)/(h·in²)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·in²) = kcal(th)/(h·m²) × 0.002558489613
About Thermochemical kilocalorie per hour per square metre
The thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) equals 4184/3600 ≈ 1.1622 W/m² (1 kcal(th) = 4184 J; 1 h = 3600 s). Used in older continental European and Soviet-era building physics standards for wall and roof heat loss calculations. 1 kcal(th)/(h·m²) ≈ 1.1622 W/m².
About International table BTU per hour per square inch
The international table BTU per hour per square inch (BTU(IT)/(h·in²)) equals 1055.05585262/(3600×6.4516×10⁻⁴) ≈ 454.26 W/m². Used for high heat flux applications such as electronic component cooling, jet engine combustor walls, and nuclear fuel assembly design in US customary units. 1 BTU(IT)/(h·in²) ≈ 454.26 W/m².
Quick Reference Table
| Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) | International table BTU per hour per square inch (BTU(IT)/(h·in²)) |
|---|---|
| 1 kcal(th)/(h·m²) | 0.00255849 BTU(IT)/(h·in²) |
| 2 kcal(th)/(h·m²) | 0.00511698 BTU(IT)/(h·in²) |
| 5 kcal(th)/(h·m²) | 0.0127924 BTU(IT)/(h·in²) |
| 10 kcal(th)/(h·m²) | 0.0255849 BTU(IT)/(h·in²) |
| 25 kcal(th)/(h·m²) | 0.0639622 BTU(IT)/(h·in²) |
| 50 kcal(th)/(h·m²) | 0.127924 BTU(IT)/(h·in²) |
| 100 kcal(th)/(h·m²) | 0.255849 BTU(IT)/(h·in²) |