Convert Watt per square millimetre to Nanowatt per square metre
Convert Watt per square millimetre (W/mm²) to Nanowatt per square metre (nW/m²) instantly and accurately.
Conversion Formula
nW/m² = W/mm² × 1000000000000000
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 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.
Quick Reference Table
| Watt per square millimetre (W/mm²) | Nanowatt per square metre (nW/m²) |
|---|---|
| 1 W/mm² | 1 × 1015 nW/m² |
| 2 W/mm² | 2 × 1015 nW/m² |
| 5 W/mm² | 5 × 1015 nW/m² |
| 10 W/mm² | 1 × 1016 nW/m² |
| 25 W/mm² | 2.5 × 1016 nW/m² |
| 50 W/mm² | 5 × 1016 nW/m² |
| 100 W/mm² | 1 × 1017 nW/m² |