Convert Thermochemical kilocalorie per hour per square metre per degree Celsius to Watt per square metre kelvin
Convert Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) to Watt per square metre kelvin (W/(m²·K)) instantly and accurately.
Conversion Formula
W/(m²·K) = kcal(th)/(h·m²·°C) × 1.162222222
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 Watt per square metre kelvin
The watt per square metre kelvin (W/(m²·K)) is the SI coherent unit for heat transfer coefficient (ISO 80000-5). Typical values: free convection in still air 2-25 W/(m²·K), forced-air cooling 25-250 W/(m²·K), natural water convection 200-1000 W/(m²·K), forced water up to 10 000 W/(m²·K), nucleate boiling up to 100 000 W/(m²·K). 1 W/(m²·K) = 1 J/(s·m²·K).
Quick Reference Table
| Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) | Watt per square metre kelvin (W/(m²·K)) |
|---|---|
| 1 kcal(th)/(h·m²·°C) | 1.16222 W/(m²·K) |
| 2 kcal(th)/(h·m²·°C) | 2.32444 W/(m²·K) |
| 5 kcal(th)/(h·m²·°C) | 5.81111 W/(m²·K) |
| 10 kcal(th)/(h·m²·°C) | 11.6222 W/(m²·K) |
| 25 kcal(th)/(h·m²·°C) | 29.0556 W/(m²·K) |
| 50 kcal(th)/(h·m²·°C) | 58.1111 W/(m²·K) |
| 100 kcal(th)/(h·m²·°C) | 116.222 W/(m²·K) |