Convert International table BTU per hour per square inch to Watt per square metre
Convert International table BTU per hour per square inch (BTU(IT)/(h·in²)) to Watt per square metre (W/m²) instantly and accurately.
Conversion Formula
W/m² = BTU(IT)/(h·in²) × 454.2610673
About International table BTU per hour per square inch
The international table BTU per hour per square inch (BTU(IT)/(h·in²)) equals 1055.05585262/(3600×6.4516×10⁻⁴) ≈ 454.26 W/m². Used for high heat flux applications such as electronic component cooling, jet engine combustor walls, and nuclear fuel assembly design in US customary units. 1 BTU(IT)/(h·in²) ≈ 454.26 W/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
| International table BTU per hour per square inch (BTU(IT)/(h·in²)) | Watt per square metre (W/m²) |
|---|---|
| 1 BTU(IT)/(h·in²) | 454.261 W/m² |
| 2 BTU(IT)/(h·in²) | 908.522 W/m² |
| 5 BTU(IT)/(h·in²) | 2271.31 W/m² |
| 10 BTU(IT)/(h·in²) | 4542.61 W/m² |
| 25 BTU(IT)/(h·in²) | 11356.5 W/m² |
| 50 BTU(IT)/(h·in²) | 22713.1 W/m² |
| 100 BTU(IT)/(h·in²) | 45426.1 W/m² |