Convert Milliwatt per square metre to International table BTU per hour per square inch
Convert Milliwatt per square metre (mW/m²) to International table BTU per hour per square inch (BTU(IT)/(h·in²)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·in²) = mW/m² × 2.201377296e-6
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).
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.
Quick Reference Table
| Milliwatt per square metre (mW/m²) | International table BTU per hour per square inch (BTU(IT)/(h·in²)) |
|---|---|
| 1 mW/m² | 2.201 × 10-6 BTU(IT)/(h·in²) |
| 2 mW/m² | 4.403 × 10-6 BTU(IT)/(h·in²) |
| 5 mW/m² | 1.101 × 10-5 BTU(IT)/(h·in²) |
| 10 mW/m² | 2.201 × 10-5 BTU(IT)/(h·in²) |
| 25 mW/m² | 5.503 × 10-5 BTU(IT)/(h·in²) |
| 50 mW/m² | 0.000110069 BTU(IT)/(h·in²) |
| 100 mW/m² | 0.000220138 BTU(IT)/(h·in²) |