Convert Nanowatt per square metre to Watt per square metre
Convert Nanowatt per square metre (nW/m²) to Watt per square metre (W/m²) instantly and accurately.
Conversion Formula
W/m² = nW/m² × 1.000000000e-9
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 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
| Nanowatt per square metre (nW/m²) | Watt per square metre (W/m²) |
|---|---|
| 1 nW/m² | 1 × 10-9 W/m² |
| 2 nW/m² | 2 × 10-9 W/m² |
| 5 nW/m² | 5 × 10-9 W/m² |
| 10 nW/m² | 1 × 10-8 W/m² |
| 25 nW/m² | 2.5 × 10-8 W/m² |
| 50 nW/m² | 5 × 10-8 W/m² |
| 100 nW/m² | 1 × 10-7 W/m² |