Convert Watt per square metre to Milliwatt per square metre
Convert Watt per square metre (W/m²) to Milliwatt per square metre (mW/m²) instantly and accurately.
Conversion Formula
mW/m² = W/m² × 1000
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 Milliwatt per square metre
The milliwatt per square metre (mW/m²) equals 10⁻³ W/m². Relevant in geothermal surveys: global average continental heat flux ≈ 65 mW/m², oceanic ≈ 101 mW/m². Used in building physics for quantifying very small heat leakage through ultra-high-performance insulation. 1 mW/m² = 10⁻³ W/m² = 1 erg/(s·cm²).
Quick Reference Table
| Watt per square metre (W/m²) | Milliwatt per square metre (mW/m²) |
|---|---|
| 1 W/m² | 1000 mW/m² |
| 2 W/m² | 2000 mW/m² |
| 5 W/m² | 5000 mW/m² |
| 10 W/m² | 10000 mW/m² |
| 25 W/m² | 25000 mW/m² |
| 50 W/m² | 50000 mW/m² |
| 100 W/m² | 100000 mW/m² |