Convert Watt per square metre to Thermochemical kilocalorie per hour per square metre
Convert Watt per square metre (W/m²) to Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) instantly and accurately.
Conversion Formula
kcal(th)/(h·m²) = W/m² × 0.8604206501
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.
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.
Quick Reference Table
| Watt per square metre (W/m²) | Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) |
|---|---|
| 1 W/m² | 0.860421 kcal(th)/(h·m²) |
| 2 W/m² | 1.72084 kcal(th)/(h·m²) |
| 5 W/m² | 4.3021 kcal(th)/(h·m²) |
| 10 W/m² | 8.60421 kcal(th)/(h·m²) |
| 25 W/m² | 21.5105 kcal(th)/(h·m²) |
| 50 W/m² | 43.021 kcal(th)/(h·m²) |
| 100 W/m² | 86.0421 kcal(th)/(h·m²) |