Convert International table BTU per hour per square foot to Microwatt per square metre
Convert International table BTU per hour per square foot (BTU(IT)/(h·ft²)) to Microwatt per square metre (µW/m²) instantly and accurately.
Conversion Formula
µW/m² = BTU(IT)/(h·ft²) × 3154590.745
About International table BTU per hour per square foot
The international table BTU per hour per square foot (BTU(IT)/(h·ft²)) equals 1055.05585262/(3600×0.09290304) ≈ 3.15459 W/m². The standard US heat flux unit in ASHRAE, ASTM, and building codes for thermal resistance (R-value), boiler ratings, and heat exchanger design. 1 BTU(IT)/(h·ft²) ≈ 3.15459 W/m².
About Microwatt per square metre
The microwatt per square metre (µW/m²) equals 10⁻⁶ W/m². Encountered in geothermal science - deep crustal heat flux measurements in stable shield regions can reach a few µW/m² - and in bio-electromagnetic research for very low intensity radiation fields. 1 µW/m² = 10⁻⁶ W/m² = 10³ nW/m².
Quick Reference Table
| International table BTU per hour per square foot (BTU(IT)/(h·ft²)) | Microwatt per square metre (µW/m²) |
|---|---|
| 1 BTU(IT)/(h·ft²) | 3154590 µW/m² |
| 2 BTU(IT)/(h·ft²) | 6309180 µW/m² |
| 5 BTU(IT)/(h·ft²) | 15773000 µW/m² |
| 10 BTU(IT)/(h·ft²) | 31545900 µW/m² |
| 25 BTU(IT)/(h·ft²) | 78864800 µW/m² |
| 50 BTU(IT)/(h·ft²) | 157730000 µW/m² |
| 100 BTU(IT)/(h·ft²) | 315459000 µW/m² |