Convert Thermochemical calorie per second per square centimetre to International table BTU per second per square foot
Convert Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) to International table BTU per second per square foot (BTU(IT)/(s·ft²)) instantly and accurately.
Conversion Formula
BTU(IT)/(s·ft²) = cal(th)/(s·cm²) × 3.684225043
About Thermochemical calorie per second per square centimetre
The thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) equals exactly 41840 W/m² (1 cal(th) = 4.184 J; 1 cm² = 10⁻⁴ m²). The CGS unit for very high heat flux: ablation heat flux during atmospheric re-entry ≈ 1-100 cal/(s·cm²). Used in plasma physics and aerospace thermal protection. 1 cal(th)/(s·cm²) = 41840 W/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
| Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) | International table BTU per second per square foot (BTU(IT)/(s·ft²)) |
|---|---|
| 1 cal(th)/(s·cm²) | 3.68423 BTU(IT)/(s·ft²) |
| 2 cal(th)/(s·cm²) | 7.36845 BTU(IT)/(s·ft²) |
| 5 cal(th)/(s·cm²) | 18.4211 BTU(IT)/(s·ft²) |
| 10 cal(th)/(s·cm²) | 36.8423 BTU(IT)/(s·ft²) |
| 25 cal(th)/(s·cm²) | 92.1056 BTU(IT)/(s·ft²) |
| 50 cal(th)/(s·cm²) | 184.211 BTU(IT)/(s·ft²) |
| 100 cal(th)/(s·cm²) | 368.423 BTU(IT)/(s·ft²) |