Convert International table BTU per hour per square inch to Milliwatt per square metre
Convert International table BTU per hour per square inch (BTU(IT)/(h·in²)) to Milliwatt per square metre (mW/m²) instantly and accurately.
Conversion Formula
mW/m² = BTU(IT)/(h·in²) × 454261.0673
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 Milliwatt per square metre
The milliwatt per square metre (mW/m²) equals 10⁻³ W/m². Relevant in geothermal surveys: global average continental heat flux ≈ 65 mW/m², oceanic ≈ 101 mW/m². Used in building physics for quantifying very small heat leakage through ultra-high-performance insulation. 1 mW/m² = 10⁻³ W/m² = 1 erg/(s·cm²).
Quick Reference Table
| International table BTU per hour per square inch (BTU(IT)/(h·in²)) | Milliwatt per square metre (mW/m²) |
|---|---|
| 1 BTU(IT)/(h·in²) | 454261 mW/m² |
| 2 BTU(IT)/(h·in²) | 908522 mW/m² |
| 5 BTU(IT)/(h·in²) | 2271310 mW/m² |
| 10 BTU(IT)/(h·in²) | 4542610 mW/m² |
| 25 BTU(IT)/(h·in²) | 11356500 mW/m² |
| 50 BTU(IT)/(h·in²) | 22713100 mW/m² |
| 100 BTU(IT)/(h·in²) | 45426100 mW/m² |