Convert Nanowatt per square metre to Watt per square millimetre
Convert Nanowatt per square metre (nW/m²) to Watt per square millimetre (W/mm²) instantly and accurately.
Conversion Formula
W/mm² = nW/m² × 1.000000000e-15
About Nanowatt per square metre
The nanowatt per square metre (nW/m²) equals 10⁻⁹ W/m². Used in astrophysics and cosmology for quantifying extremely weak radiation fields, such as cosmic microwave background intensity and residual thermal emission from near-absolute-zero objects. Relevant in precision cryogenic sensor calibration. 1 nW/m² = 10⁻⁹ W/m² = 10³ pW/m².
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
| Nanowatt per square metre (nW/m²) | Watt per square millimetre (W/mm²) |
|---|---|
| 1 nW/m² | 1 × 10-15 W/mm² |
| 2 nW/m² | 2 × 10-15 W/mm² |
| 5 nW/m² | 5 × 10-15 W/mm² |
| 10 nW/m² | 1 × 10-14 W/mm² |
| 25 nW/m² | 2.5 × 10-14 W/mm² |
| 50 nW/m² | 5 × 10-14 W/mm² |
| 100 nW/m² | 1 × 10-13 W/mm² |