Convert Erg per second per square centimetre to International table BTU per hour per square foot
Convert Erg per second per square centimetre (erg/(s·cm²)) to International table BTU per hour per square foot (BTU(IT)/(h·ft²)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·ft²) = erg/(s·cm²) × 0.0003169983306
About Erg per second per square centimetre
The erg per second per square centimetre (erg/(s·cm²)) equals exactly 10⁻³ W/m² in SI (1 erg = 10⁻⁷ J; 1 cm² = 10⁻⁴ m²). The CGS irradiance unit used in classical electromagnetic theory, astrophysics, and older radiation physics literature. Numerically equal to the milliwatt per square metre. 1 erg/(s·cm²) = 10⁻³ W/m² = 1 mW/m².
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.
Quick Reference Table
| Erg per second per square centimetre (erg/(s·cm²)) | International table BTU per hour per square foot (BTU(IT)/(h·ft²)) |
|---|---|
| 1 erg/(s·cm²) | 0.000316998 BTU(IT)/(h·ft²) |
| 2 erg/(s·cm²) | 0.000633997 BTU(IT)/(h·ft²) |
| 5 erg/(s·cm²) | 0.00158499 BTU(IT)/(h·ft²) |
| 10 erg/(s·cm²) | 0.00316998 BTU(IT)/(h·ft²) |
| 25 erg/(s·cm²) | 0.00792496 BTU(IT)/(h·ft²) |
| 50 erg/(s·cm²) | 0.0158499 BTU(IT)/(h·ft²) |
| 100 erg/(s·cm²) | 0.0316998 BTU(IT)/(h·ft²) |