Convert International table BTU per second per square foot to Watt per square inch
Convert International table BTU per second per square foot (BTU(IT)/(s·ft²)) to Watt per square inch (W/in²) instantly and accurately.
Conversion Formula
W/in² = BTU(IT)/(s·ft²) × 7.326776754
About International table BTU per second per square foot
The international table BTU per second per square foot (BTU(IT)/(s·ft²)) equals 1055.05585262/0.09290304 ≈ 11357 W/m² (= 3600 × BTU(IT)/(h·ft²)). Used for extreme heat flux: atmospheric re-entry aerodynamic heating, solid rocket nozzle throat, and nuclear reactor thermal hydraulics design. 1 BTU(IT)/(s·ft²) ≈ 11357 W/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
| International table BTU per second per square foot (BTU(IT)/(s·ft²)) | Watt per square inch (W/in²) |
|---|---|
| 1 BTU(IT)/(s·ft²) | 7.32678 W/in² |
| 2 BTU(IT)/(s·ft²) | 14.6536 W/in² |
| 5 BTU(IT)/(s·ft²) | 36.6339 W/in² |
| 10 BTU(IT)/(s·ft²) | 73.2678 W/in² |
| 25 BTU(IT)/(s·ft²) | 183.169 W/in² |
| 50 BTU(IT)/(s·ft²) | 366.339 W/in² |
| 100 BTU(IT)/(s·ft²) | 732.678 W/in² |