Convert Erg per second per square centimetre to International table BTU per second per square foot
Convert Erg per second per square centimetre (erg/(s·cm²)) to International table BTU per second per square foot (BTU(IT)/(s·ft²)) instantly and accurately.
Conversion Formula
BTU(IT)/(s·ft²) = erg/(s·cm²) × 8.805509184e-8
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 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.
Quick Reference Table
| Erg per second per square centimetre (erg/(s·cm²)) | International table BTU per second per square foot (BTU(IT)/(s·ft²)) |
|---|---|
| 1 erg/(s·cm²) | 8.806 × 10-8 BTU(IT)/(s·ft²) |
| 2 erg/(s·cm²) | 1.761 × 10-7 BTU(IT)/(s·ft²) |
| 5 erg/(s·cm²) | 4.403 × 10-7 BTU(IT)/(s·ft²) |
| 10 erg/(s·cm²) | 8.806 × 10-7 BTU(IT)/(s·ft²) |
| 25 erg/(s·cm²) | 2.201 × 10-6 BTU(IT)/(s·ft²) |
| 50 erg/(s·cm²) | 4.403 × 10-6 BTU(IT)/(s·ft²) |
| 100 erg/(s·cm²) | 8.806 × 10-6 BTU(IT)/(s·ft²) |