Convert International table BTU per hour per square inch to Nanowatt per square metre
Convert International table BTU per hour per square inch (BTU(IT)/(h·in²)) to Nanowatt per square metre (nW/m²) instantly and accurately.
Conversion Formula
nW/m² = BTU(IT)/(h·in²) × 454261067300
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 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
| International table BTU per hour per square inch (BTU(IT)/(h·in²)) | Nanowatt per square metre (nW/m²) |
|---|---|
| 1 BTU(IT)/(h·in²) | 4.543 × 1011 nW/m² |
| 2 BTU(IT)/(h·in²) | 9.085 × 1011 nW/m² |
| 5 BTU(IT)/(h·in²) | 2.271 × 1012 nW/m² |
| 10 BTU(IT)/(h·in²) | 4.543 × 1012 nW/m² |
| 25 BTU(IT)/(h·in²) | 1.136 × 1013 nW/m² |
| 50 BTU(IT)/(h·in²) | 2.271 × 1013 nW/m² |
| 100 BTU(IT)/(h·in²) | 4.543 × 1013 nW/m² |