Convert Milliwatt per square metre to Watt per square metre
Convert Milliwatt per square metre (mW/m²) to Watt per square metre (W/m²) instantly and accurately.
Conversion Formula
W/m² = mW/m² × 0.001
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).
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
| Milliwatt per square metre (mW/m²) | Watt per square metre (W/m²) |
|---|---|
| 1 mW/m² | 0.001 W/m² |
| 2 mW/m² | 0.002 W/m² |
| 5 mW/m² | 0.005 W/m² |
| 10 mW/m² | 0.01 W/m² |
| 25 mW/m² | 0.025 W/m² |
| 50 mW/m² | 0.05 W/m² |
| 100 mW/m² | 0.1 W/m² |