Convert Watt per square millimetre to Thermochemical kilocalorie per hour per square metre
Convert Watt per square millimetre (W/mm²) to Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) instantly and accurately.
Conversion Formula
kcal(th)/(h·m²) = W/mm² × 860420.6501
About Watt per square millimetre
The watt per square millimetre (W/mm²) equals exactly 10⁶ W/m². Used in high-power laser material processing - cutting, welding, and additive manufacturing - and electron beam applications. A 1 kW laser focused to 1 mm² achieves 1 W/mm². Numerically equal to MW/m². 1 W/mm² = 10⁶ W/m² = 100 W/cm².
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 millimetre (W/mm²) | Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) |
|---|---|
| 1 W/mm² | 860421 kcal(th)/(h·m²) |
| 2 W/mm² | 1720840 kcal(th)/(h·m²) |
| 5 W/mm² | 4302100 kcal(th)/(h·m²) |
| 10 W/mm² | 8604210 kcal(th)/(h·m²) |
| 25 W/mm² | 21510500 kcal(th)/(h·m²) |
| 50 W/mm² | 43021000 kcal(th)/(h·m²) |
| 100 W/mm² | 86042100 kcal(th)/(h·m²) |