Convert Watt per square metre to Watt per square inch
Convert Watt per square metre (W/m²) to Watt per square inch (W/in²) instantly and accurately.
Conversion Formula
W/in² = W/m² × 0.00064516
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.
About Watt per square inch
The watt per square inch (W/in²) equals 1/(6.4516×10⁻⁴) ≈ 1550.003 W/m² (1 in = 0.0254 m). Used in US electronics thermal management for PCB power density, semiconductor die heat flux, and power module ratings. 1 W/in² ≈ 1550 W/m² ≈ 0.155 W/cm².
Quick Reference Table
| Watt per square metre (W/m²) | Watt per square inch (W/in²) |
|---|---|
| 1 W/m² | 0.00064516 W/in² |
| 2 W/m² | 0.00129032 W/in² |
| 5 W/m² | 0.0032258 W/in² |
| 10 W/m² | 0.0064516 W/in² |
| 25 W/m² | 0.016129 W/in² |
| 50 W/m² | 0.032258 W/in² |
| 100 W/m² | 0.064516 W/in² |