Convert Milliwatt per square metre to Watt per square millimetre
Convert Milliwatt per square metre (mW/m²) to Watt per square millimetre (W/mm²) instantly and accurately.
Conversion Formula
W/mm² = mW/m² × 1.000000000e-9
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 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.
Quick Reference Table
| Milliwatt per square metre (mW/m²) | Watt per square millimetre (W/mm²) |
|---|---|
| 1 mW/m² | 1 × 10-9 W/mm² |
| 2 mW/m² | 2 × 10-9 W/mm² |
| 5 mW/m² | 5 × 10-9 W/mm² |
| 10 mW/m² | 1 × 10-8 W/mm² |
| 25 mW/m² | 2.5 × 10-8 W/mm² |
| 50 mW/m² | 5 × 10-8 W/mm² |
| 100 mW/m² | 1 × 10-7 W/mm² |