Convert International table BTU per second per square foot to Milliwatt per square metre
Convert International table BTU per second per square foot (BTU(IT)/(s·ft²)) to Milliwatt per square metre (mW/m²) instantly and accurately.
Conversion Formula
mW/m² = BTU(IT)/(s·ft²) × 11356526.68
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 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 second per square foot (BTU(IT)/(s·ft²)) | Milliwatt per square metre (mW/m²) |
|---|---|
| 1 BTU(IT)/(s·ft²) | 11356500 mW/m² |
| 2 BTU(IT)/(s·ft²) | 22713100 mW/m² |
| 5 BTU(IT)/(s·ft²) | 56782600 mW/m² |
| 10 BTU(IT)/(s·ft²) | 113565000 mW/m² |
| 25 BTU(IT)/(s·ft²) | 283913000 mW/m² |
| 50 BTU(IT)/(s·ft²) | 567826000 mW/m² |
| 100 BTU(IT)/(s·ft²) | 1.136 × 109 mW/m² |