Convert Thermochemical kilocalorie per hour per square metre to Watt per square metre
Convert Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) to Watt per square metre (W/m²) instantly and accurately.
Conversion Formula
W/m² = kcal(th)/(h·m²) × 1.162222222
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 Watt per square metre
The watt per square metre (W/m²) is the SI coherent unit for heat flux density and irradiance. Solar irradiance at Earth's surface ≈ 1000 W/m²; solar constant ≈ 1361 W/m²; human skin radiative emission ≈ 100 W/m²; global average geothermal flux ≈ 0.087 W/m². Referenced in ISO 80000-4. 1 W/m² = 1 J/(s·m²) = 10⁻³ kW/m².
Quick Reference Table
| Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) | Watt per square metre (W/m²) |
|---|---|
| 1 kcal(th)/(h·m²) | 1.16222 W/m² |
| 2 kcal(th)/(h·m²) | 2.32444 W/m² |
| 5 kcal(th)/(h·m²) | 5.81111 W/m² |
| 10 kcal(th)/(h·m²) | 11.6222 W/m² |
| 25 kcal(th)/(h·m²) | 29.0556 W/m² |
| 50 kcal(th)/(h·m²) | 58.1111 W/m² |
| 100 kcal(th)/(h·m²) | 116.222 W/m² |